Quarterly report pursuant to Section 13 or 15(d)

REVENUE RECOGNITION - Schedule of Effect of New Accounting Pronouncements (Details)

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REVENUE RECOGNITION - Schedule of Effect of New Accounting Pronouncements (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Jan. 01, 2018
Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]            
Revenues $ 115,000 $ 106,000 $ 396,000 $ 482,000    
Prepaid expenses and other current assets 397,000   397,000   $ 603,000 $ 536,000
Deferred revenue 187,000   187,000   146,000 143,000
Accumulated deficit (85,691,000)   (85,691,000)   $ (67,748,000) (67,812,000)
Net loss (6,275,000) $ (4,184,000) (17,943,000) $ (13,341,000)    
Calculated under Revenue Guidance in Effect before Topic 606            
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]            
Revenues 155,000   484,000      
Prepaid expenses and other current assets 394,000   394,000     536,000
Deferred revenue 160,000   160,000     143,000
Accumulated deficit (85,667,000)   (85,667,000)     (67,812,000)
Net loss (6,235,000)   (17,855,000)      
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606            
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]            
Revenues (40,000)   (88,000)      
Prepaid expenses and other current assets 3,000   3,000     67,000
Deferred revenue 27,000   27,000     3,000
Accumulated deficit (24,000)   (24,000)     $ 64,000
Net loss $ 40,000   $ 88,000