Stock Options: (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 12, 2014
Nov. 19, 2015
Nov. 17, 2015
Mar. 19, 2015
Jul. 23, 2014
Jul. 16, 2014
Mar. 21, 2014
Jan. 23, 2014
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price                 $ 1.39   $ 1.39   $ 1.41  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate                     0.00%   0.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate                     89.34%   90.11%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate                     1.75%   2.23%  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value                     $ 0.35   $ 0.46 $ 0.86
Employee Benefits and Share-based Compensation                 $ 209,641 $ 183,193 $ 414,687 $ 245,015 $ 722,934 $ 1,203,663
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options                 $ 1,600,000   $ 1,600,000   $ 1,900,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition                     2 years 4 months 17 days   2 years 9 months 7 days  
Director [Member] | Non-Qualified Stock Options [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 300,000                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 0.60                          
Three Employee [Member] | Plan 2013 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period               300,000            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price               $ 1.76            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights               125,000 of these options vest 25% per year, with accelerated vesting of 25% upon a termination without cause or for good reason, with the remaining 175,000 vesting 20% per year.            
One Employee [Member] | Plan 2013 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period             30,000              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price             $ 2.30              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage             20.00%              
One Employee [Member] | Employee Stock Option [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period       20,000                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price       $ 1.17                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage       20.00%                    
Chief Executive Officer [Member] | Non-Qualified Stock Options [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 250,000                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price       $ 0.60                    
Chairman [Member] | Non-Qualified Stock Options [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 50,000                          
Equity Incentive Plan 2013 [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                 7,000,000   7,000,000   7,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   1,075,000                        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period   10 years                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price   $ 0.80                        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   25.00%                        
Share-based Compensation Arrangement by Share-based Payment Award, Description         Also, on July 23, 2014, the Board granted non-qualified stock options to three directors, each in the amount of 100,000 shares of common stock; 50,000 of which have an exercise price equal to $1.11 per share, which vested on the date of the grant hereof; and 50,000 of which have an exercise price equal to two times the value of the exercise price of the first 50,000 options, or $2.22 per share, which vest daily over four (4) years (assuming continued service on behalf of the Company), up to 25% per year, until the grant is fully vested on July 23, 2018.                  
Equity Incentive Plan 2013 [Member] | Maximum [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         10,000,000                  
Equity Incentive Plan 2013 [Member] | Minimum [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         3,000,000                  
Equity Incentive Plan 2013 [Member] | Director [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   50,000                        
Equity Incentive Plan 2013 [Member] | One Employee [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period           50,000                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price           $ 1.24                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage           20.00%                
Equity Incentive Plan 2013 [Member] | President and Chief Executive Officer [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   600,000 100,000                      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price     $ 0.60                      
Equity Incentive Plan 2013 [Member] | Chairman Employee [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   200,000                        
Equity Incentive Plan 2013 [Member] | Two Employees [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   75,000                        
Equity Incentive Plan 2013 [Member] | Chief Financial Officer [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   100,000                        
Equity Incentive Plan 2013 [Member] | Employee [Member]                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period       50,000                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period       10 years                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price       $ 1.17