Segment and geographic information Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 50,373	$ 32,571	$ 142,394	$ 135,558
Domestic Segment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	26,470	12,341
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,650	4,413
Rest Of The World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	19,253	15,817
Consumer [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	0	0	0	0
Cinema [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 50,373	$ 32,571	142,394	135,558
Cinema [Member] | Domestic Segment [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			72,265	59,413
Cinema [Member] | CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			16,350	13,683
Cinema [Member] | Rest Of The World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			$ 53,779	$ 62,462