STOCKHOLDERS' EQUITY (Details Textual) - USD ($)
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 11, 2017
Dec. 02, 2016
Feb. 04, 2016
Apr. 30, 2018
Jan. 31, 2018
Dec. 19, 2017
Oct. 31, 2017
Apr. 30, 2017
Mar. 31, 2017
Feb. 28, 2017
Dec. 31, 2016
Jun. 30, 2016
Jun. 24, 2016
May 31, 2016
Mar. 31, 2016
Mar. 28, 2016
Feb. 29, 2016
Feb. 25, 2016
Mar. 31, 2017
Jun. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Feb. 28, 2018
Dec. 31, 2015
Jun. 17, 2015
Jun. 16, 2015
Class of Stock [Line Items]                                                        
Stock authorized, shares                     50,000,000                 50,000,000 50,000,000   50,000,000 50,000,000        
Par value of preferred stock authorized (in dollars per share)                     $ 0.0001                 $ 0.0001 $ 0.0001   $ 0.0001 $ 0.0001        
Preferred stock, Outstanding (in shares)                                   9,374                    
Stock-based compensation expense                                             $ 520,000          
Share Price $ 2.468       $ 2.36                 $ 4.12 $ 3.70                          
Common Stock, Shares Authorized                     200,000,000                 200,000,000 200,000,000   200,000,000 200,000,000        
Shares Issued, Price Per Share         $ 1.19                                              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period             8,621                                          
Deferred Compensation Liability, Current                                             $ 73,000          
Deferred Compensation Liability, Current and Noncurrent                                       $ 388,000 $ 388,000   520,000          
Accrued Bonus Reduction Related To Vesting Of Restricted Stock                                         $ 73,035 $ 427,320 $ 511,526 $ 0        
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period         436,000                                              
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         10 years                                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price         $ 2.80           $ 7.21                 $ 6.35 $ 6.35   $ 7.21 $ 7.21   $ 7.20    
Sale of Stock, Price Per Share         $ 2.80                                              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate         41.00%                                              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term         10 years                                              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate         2.70%                                              
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures       12,377                               17,497                
Initial Board Retainer Fees       $ 25,000                                                
Retainer And Meeting Fees                                       $ 34,000                
Reduction of accrued bonuses in connection with vested stock options                                         $ 132,527 0            
Adjusted Conversion Price                                   3.40                    
Conversion of Stock, Amount Issued                                   $ 990.00                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 972,000         1,117,800       100,000               304.615                    
Common Stock Prior To Adjustment                                   2,729,489                    
Additional Collateral, Aggregate Fair Value                                   $ 580,000                    
Conversion of Stock, Shares Converted               15,995                   2,855,469                    
Stock Issued During Period, Shares, New Issues 2,430,000                         4,843                            
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right                               925,000                        
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 2.80         $ 3.40       $ 3.45           $ 4.35                        
Proceeds from Issuance of Common Stock                                             $ 13,193,831 $ 19,795,476        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                                         436,000   0 0        
Stock Issued During Period, Shares, Issued for Services                             9,480                          
Stock Issued During Period, Value, Issued for Services                           $ 20,000 $ 35,599               $ 0 $ 55,599        
Stock Issued During Period, Value, Restricted Stock Award, Gross                     $ 1,000                       68,002          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period                     1,000                                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period                     2,000                                  
Stock Issued During Period, Value, Restricted Stock Award, Forfeitures                     $ 11,111                                  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Total Fair Value             $ 25,000                                          
Share-based Compensation                                         $ 326,434 838,378 1,260,179 2,311,410        
Stock Issued During Period, Shares, Conversion of Units               15,995                                        
Underwriting Agreement [Member]                                                        
Class of Stock [Line Items]                                                        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights           145,800                                            
Stock Issued During Period, Shares, New Issues           2,794,500                                            
Proceeds From Sale Of Units Gross           $ 7,800,000                                            
Legal Fees           $ 6,500,000                                            
Accounts Payable and Accrued Liabilities [Member]                                                        
Class of Stock [Line Items]                                                        
Stock-based compensation expense                                             59,000 530,000        
Deferred Compensation Liability, Current                     530,000                       $ 59,000 530,000        
Share-based Compensation                                               530,000        
Consultant Agreement [Member]                                                        
Class of Stock [Line Items]                                                        
Stock Issued During Period, Value, Restricted Stock Award, Forfeitures                     12,964                                  
Laidlaw Company Uk Ltd [Member]                                                        
Class of Stock [Line Items]                                                        
Shares Issued, Price Per Share   $ 3.40                                                    
Stock Issued During Period, Shares, New Issues   2,205,883                                                    
Payments of Stock Issuance Costs   $ 859,000                                                    
Proceeds from Issuance of Common Stock   $ 6,600,000                                                    
Amendment [Member]                                                        
Class of Stock [Line Items]                                                        
Common Stock, Shares Authorized                                                     200,000,000 800,000,000
Private Placement [Member]                                                        
Class of Stock [Line Items]                                                        
Share Price                               $ 4.35   $ 5.06                    
Common Stock, Shares Authorized                               1,850,000   2,120,882                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights                               0.5   0.5                    
Common Stock Prior To Adjustment                                             938,891          
Stock Issued During Period, Shares, New Issues     367,647     2,347,236                   1,850,000   2,120,882                    
Proceeds From Sale Of Units Gross     $ 1,250,000     $ 6,800,000                       $ 6,900,000                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right           0.40                   925,000   1,060,429                    
Legal Fees                               $ 6,000,000 $ 229,000 $ 6,100,000                    
Payments Of Stock Issuance Costs Commissions                               695,000                        
Payments of Stock Issuance Costs                               $ 25,000                        
Convertible Preferred Stock, Shares Issued upon Conversion                               261,590                        
Class of Warrant or Right, Exercise Price of Warrants or Rights           $ 3.40                   $ 5.06                        
Stock Issued During Period, Shares, Issued for Services           2,347,236                                            
Warrant [Member]                                                        
Class of Stock [Line Items]                                                        
Stock-based compensation expense                   $ 86,899                                    
Share Price                   $ 3.32                                    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                   100,000                                    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period           2,056,691 2,033,590                                          
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Options Granted In Period Total Fair Value                   $ 87,000                                    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value                   $ 0.87                                    
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Volatility Rate                   48.00%                                    
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Term                   10 years                                    
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Risk Free Interest Rate                   1.17%                                    
Warrant [Member] | Underwriting Agreement [Member]                                                        
Class of Stock [Line Items]                                                        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 145,800                                                      
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.136                                                      
Units Shares [Member]                                                        
Class of Stock [Line Items]                                                        
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right                                   1,060,429                    
Class of Warrant or Right, Exercise Price of Warrants or Rights                                   $ 5.06                    
Number Of Common Stock Per Unit                                   5.06                    
Preferred Stock Convertible Conversion Price                                   $ 261,590                    
Warrants Expiration Date                                   Aug. 25, 2018                    
Subsequent Event [Member]                                                        
Class of Stock [Line Items]                                                        
Share Price         $ 2.36                                              
Shares Issued, Price Per Share         $ 1.19                                              
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period         436,000                                              
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period         10 years                                              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price         $ 2.80                                              
Sale of Stock, Price Per Share         $ 2.80                                              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate         41.00%                                              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term         10 years                                              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate         2.70%                                              
Maximum [Member]                                                        
Class of Stock [Line Items]                                                        
Share Price                             $ 3.90                          
Adjusted Conversion Price     5.04                                                  
Minimum [Member]                                                        
Class of Stock [Line Items]                                                        
Adjusted Conversion Price     3.40                                                  
Minimum [Member] | Private Placement [Member]                                                        
Class of Stock [Line Items]                                                        
Adjusted Conversion Price                                   3.25                    
Restricted Stock                                                        
Class of Stock [Line Items]                                                        
Stock-based compensation expense                                         292,433 $ 734,692 $ 1,110,111 $ 2,255,811        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options                                       $ 1,594,089 $ 1,594,089   $ 1,861,521          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         25,000                                              
Employee Stock Option [Member] | Underwriting Agreement [Member]                                                        
Class of Stock [Line Items]                                                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 364,500                                                      
Incentive Rsu [Member]                                                        
Class of Stock [Line Items]                                                        
Stock-based compensation expense                       $ 702,000                                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period                       120,000                                
Restricted Stock Units (RSUs) [Member]                                                        
Class of Stock [Line Items]                                                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                   25,000     5,995               54,874   241,051 5,995        
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures                                     5,591                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period                                     5,591   85,135   21,586 1,000        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period                                     3,759   0   3,759 2,000        
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Total Fair Value                   $ 80,000     $ 25,239                              
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited                                     10,926                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value                                         $ 2.16   $ 3.19 $ 4.21        
Employee And Directors [Member] | Restricted Stock Units (RSUs) [Member]                                                        
Class of Stock [Line Items]                                                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                   116,229                                    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Total Fair Value                   $ 382,000                                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage                   50.00%                                    
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member]                                                        
Class of Stock [Line Items]                                                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                 50,000                                      
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Options Granted In Period Total Fair Value                 $ 149,500                                      
Board of Directors Chairman [Member]                                                        
Class of Stock [Line Items]                                                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                                             41,201          
Deferred Compensation Liability, Current and Noncurrent                     $ 73,250                       $ 68,000 $ 73,250   $ 73,250    
Stock Issued During Period, Shares, Share-based Compensation, Gross                                             2,351          
Convertible Series A Preferred Stock                                                        
Class of Stock [Line Items]                                                        
Stock authorized, shares                     2,250,000                 2,250,000 2,250,000   2,250,000 2,250,000        
Par value of preferred stock authorized (in dollars per share)                     $ 0.0001                 $ 0.0001 $ 0.0001   $ 0.0001 $ 0.0001        
Preferred stock, Outstanding (in shares)                     0                 0 0   0 0        
Stock Issued During Period, Shares, New Issues                                             0 0        
Stock Issued During Period, Shares, Issued for Services                                             0 0        
Stock Issued During Period, Value, Issued for Services                                             $ 0 $ 0        
Stock Issued During Period, Value, Restricted Stock Award, Gross                                             $ 0          
Convertible Series B Preferred Stock                                                        
Class of Stock [Line Items]                                                        
Stock authorized, shares                     8,000,000                 8,000,000 8,000,000   8,000,000 8,000,000        
Par value of preferred stock authorized (in dollars per share)                     $ 0.0001                 $ 0.0001 $ 0.0001   $ 0.0001 $ 0.0001        
Preferred stock, Outstanding (in shares)                     0                 0 0   0 0        
Stock Issued During Period, Shares, New Issues                                             0 0        
Stock Issued During Period, Shares, Issued for Services                                             0 0        
Stock Issued During Period, Value, Issued for Services                                             $ 0 $ 0        
Stock Issued During Period, Value, Restricted Stock Award, Gross                                             $ 0          
Convertible Series C Preferred Stock                                                        
Class of Stock [Line Items]                                                        
Stock authorized, shares                     3,284,396                 3,284,396 3,284,396   3,284,396 3,284,396        
Par value of preferred stock authorized (in dollars per share)                     $ 0.0001                 $ 0.0001 $ 0.0001   $ 0.0001 $ 0.0001        
Preferred stock, Outstanding (in shares)                     0                 0 0   0 0 0      
Stock Issued During Period, Shares, New Issues                                             0 0        
Stock Issued During Period, Shares, Issued for Services                                             0 0        
Stock Issued During Period, Value, Issued for Services                                             $ 0 $ 0        
Stock Issued During Period, Value, Restricted Stock Award, Gross                                             $ 0          
Convertible Series E Preferred Stock                                                        
Class of Stock [Line Items]                                                        
Stock authorized, shares                     15,151 328     100         15,151 15,151   15,151 15,151        
Par value of preferred stock authorized (in dollars per share)                     $ 0.0001                 $ 0.0001 $ 0.0001   $ 0.0001 $ 0.0001        
Preferred stock, Outstanding (in shares)           8,946         8,946                 8,946 8,946   8,946 8,946        
Stock Issued During Period, Shares, Conversion of Convertible Securities     2,729,780                                                  
Conversion of Stock, Shares Issued                       99,916     30,461   292                      
Conversion of Stock, Amount Issued     $ 990.00     $ 990.00                                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     291.176     353.571                                            
Common Stock Units Sold     9,375                                                  
Common Stock Prior To Adjustment     1,841,528     2,725,089                                            
Additional Collateral, Aggregate Fair Value     $ 3,020,000                                       $ 1,070,000          
Conversion of Stock, Shares Converted           3,163,051                                            
Stock Issued During Period, Shares, New Issues                                             0 0        
Stock Issued During Period, Shares, Issued for Services                                             0 0        
Stock Issued During Period, Value, Issued for Services                                             $ 0 $ 0        
Stock Issued During Period, Value, Restricted Stock Award, Gross                                             $ 0          
Convertible Series E Preferred Stock | Maximum [Member]                                                        
Class of Stock [Line Items]                                                        
Adjusted Conversion Price           3.25                                            
Convertible Series E Preferred Stock | Minimum [Member]                                                        
Class of Stock [Line Items]                                                        
Adjusted Conversion Price           2.80                                            
9% Series D Cumulative Preferred Stock                                                        
Class of Stock [Line Items]                                                        
Stock authorized, shares                     7,500,000                 7,500,000 7,500,000   7,500,000 7,500,000        
Par value of preferred stock authorized (in dollars per share)                     $ 0.0001                 $ 0.0001 $ 0.0001   $ 0.0001 $ 0.0001        
Preferred stock, Outstanding (in shares)                     0                 0 0   0 0