CONSOLIDATED BALANCE SHEET COMPONENTS - INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 43,594	$ 43,600
Intangible assets, accumulated amortization	(23,367)	(28,947)
Total	20,227	14,653
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	116	121
Intangible assets, accumulated amortization	(107)	(112)
Total	$ 9	$ 9
Intangible assets useful life	3 years	3 years
Customer relationships and contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 21,968	$ 21,969
Intangible assets, accumulated amortization	(9,154)	(11,260)
Total	$ 12,814	$ 10,709
Customer relationships and contracts [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	3 years	3 years
Customer relationships and contracts [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	15 years	15 years
Theatre relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 550	$ 550
Intangible assets, accumulated amortization	(390)	(435)
Total	$ 160	$ 115
Theatre relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	10 years	10 years
Theatre relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	12 years	12 years
Content library [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 19,767	$ 19,767
Intangible assets, accumulated amortization	(12,523)	(15,947)
Total	$ 7,244	$ 3,820
Content library [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	5 years	5 years
Content library [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life	6 years	6 years
Favorable lease agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 1,193	$ 1,193
Intangible assets, accumulated amortization	(1,193)	(1,193)
Total	$ 0	$ 0
Intangible assets useful life	4 years	4 years