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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NARRATIVE (Details) - USD ($)
 3 Months Ended 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Jun. 30, 2015
Sep. 30, 2017
Sep. 30, 2016
Deferred Revenue Arrangement [Line Items]          
Provision for doubtful accounts $ 949,000 $ 0   $ 949,000 $ 0
Asset Impairment Charges 0 0   0 $ 0
Goodwill impairment   $ 0   0  
Activation fee revenue, per screen     $ 2,000    
Activation fee revenue range, minimum 1,000     1,000  
Activation fee revenue range, maximum $ 2,000     $ 2,000  
Shares under option, granted (shares)   0   0 0
Shares under option, exercised (shares) 0 0   0 0
Antidilutive securities excluded from computation of earnings per share (shares)       1,481,127 2,899,259
Restricted Stock          
Deferred Revenue Arrangement [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 20,000 0      
Convertible Debt | Convertible Notes | Forward Stock Purchase Transaction          
Deferred Revenue Arrangement [Line Items]          
Treasury stock, shares acquired (shares) 900,000 900,000.0   900,000.0 900,000.0
Services          
Deferred Revenue Arrangement [Line Items]          
Provision for doubtful accounts $ 0     $ 0  
Administrative fee VPFs 5.00%     5.00%  
Incentive fees, percentage of VPF Phase I 2.50%     2.50%  
Up-front Payment Arrangement          
Deferred Revenue Arrangement [Line Items]          
Administrative fee VPFs 10.00%     10.00%  
Prepaid Expense and Other Assets, Current [Member]          
Deferred Revenue Arrangement [Line Items]          
Asset Impairment Charges $ 200,000 $ 500,000   $ 1,000,000 $ 800,000