SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
3 Months Ended 9 Months Ended
Jan. 29, 2018
USD ($)
shares
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
shares
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2017
USD ($)
shares
Significant Accounting Policies Disclosure [Line Items]          
Exchange ratio in connection with merger 0.37686604        
Reverse stock split ratio one new share for every ten shares        
Decrease in fair value of non-employee option grants   $ 3,100,000      
General and administrative expense   $ 1,565,992 $ 1,973,256 $ 9,865,455 $ 6,115,088
Antidilutive securities excluded from computation of earnings per share | shares   9,391,284 6,509,824 9,391,284 6,509,824
Stockholders' Equity Note, Stock Split, Conversion Ratio 0.10        
Pantent Costs          
Significant Accounting Policies Disclosure [Line Items]          
General and administrative expense   $ 89,000 $ 75,000 $ 398,000 $ 310,000
Monster Digital, Inc          
Significant Accounting Policies Disclosure [Line Items]          
Equity interest issued or issuable (in shares) | shares 1,864,808        
Liabilities assumed $ 1,000,000        
Employee Stock Option          
Significant Accounting Policies Disclosure [Line Items]          
Antidilutive securities excluded from computation of earnings per share | shares   8,500,000 6,500,000 9,400,000 6,500,000