SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NARRATIVE (Details)		3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 29, 2015 shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) system shares	Dec. 31, 2015 USD ($) $ / shares shares	Mar. 31, 2015 USD ($)
Deferred Revenue Arrangement [Line Items]
Net cash used in by investing activities				$ (380,000)	$ (1,416,000)
Net cash used in financing activities				(32,882,000)	(6,424,000)
Goodwill impairment		$ 0	$ 0	$ 0	$ (18,000,000)
Number of systems that have ceased to earn VPF | system				1,892
Percent of systems expected to cease earning VPF				50.00%
Percent of active systems expected to cease earning VPF				47.00%
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
Options grants in period, weighted average grant date fair value (in dollars per share) | $ / shares			$ 3.48		$ 4.67
Shares under option, granted (shares) | shares		0	5,500	0	18,500
Shares under option, exercised (shares) | shares			2,500		2,500
Antidilutive securities excluded from computation of earnings per share (shares) | shares				1,420,227	2,729,712
Convertible Debt | Convertible Notes
Deferred Revenue Arrangement [Line Items]
Treasury stock, shares acquired (shares) | shares	272,100
Convertible Debt | Convertible Notes | Forward Stock Purchase Transaction
Deferred Revenue Arrangement [Line Items]
Treasury stock, shares acquired (shares) | shares		1,200,000	1,200,000.0	1,200,000.0	1,200,000.0
Services
Deferred Revenue Arrangement [Line Items]
Goodwill impairment					$ 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%
Restatement Adjustment [Member]
Deferred Revenue Arrangement [Line Items]
Net cash used in by investing activities					$ (1,100,000)
Net cash used in financing activities						$ 1,100,000