SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NARRATIVE (Details) - USD ($)	3 Months Ended				12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Mar. 31, 2017	Mar. 31, 2016
Deferred Revenue Arrangement [Line Items]
Loss on disposal of property and equipment		$ 89,000			$ 0
Goodwill, Impairment Loss	$ 0	(18,000,000)			$ 0	$ (18,000,000)
Fair Value Inputs, Federal and State Tax Rate					40.00%
Activation Fee Revenue, Per Screen			$ 2,000
Activation fee revenue, lower range			1,000
Activation fee revenue, upper range			$ 2,000
Advertising costs		$ 300,000			$ 100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 7.94
Cashless exercise of stock options (in shares)		2,500				2,500
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		2,710,866			1,416,677,000
Up-front Payment Arrangement [Member]
Deferred Revenue Arrangement [Line Items]
Administrative Fee VPFs			10.00%
Services
Deferred Revenue Arrangement [Line Items]
Goodwill, Impairment Loss	$ 0					$ 0
Administrative Fee VPFs	5.00%				5.00%
Incentive Fees, Percentage of VPF Phase I			2.50%
Content & Entertainment
Deferred Revenue Arrangement [Line Items]
Goodwill, Impairment Loss	$ 0			$ 18,000,000	$ (18,000,000)	(18,000,000)
Discount rate					17.00%
Class A common stock | Forward Contracts [Member]
Deferred Revenue Arrangement [Line Items]
Forward Contracts Indexed to Issuer's Equity, Indexed Shares	1,179,138				1,179,138
Prepaid Expense and Other Assets, Current [Member]
Deferred Revenue Arrangement [Line Items]
Loss on disposal of property and equipment					$ 3,600,000	$ 2,500,000