Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2011
Statement of Other Comprehensive Income [Abstract]
Net loss	$ (22,678)		$ (6,426)		$ (767)
Other comprehensive income (loss):
Foreign currency translation adjustments	(230)		(284)		474
Unrealized holding gains (losses) on available for sale securities	34	[1]	137	[1]	(26)	[1]
Recognition of previously unrealized gains on available for sale securities included in net loss	(114)	[2]	(42)	[2]	(7)	[2]
Other comprehensive income (loss)	(310)		(189)		441
Comprehensive loss	(22,988)		(6,615)		(326)
Comprehensive loss attributable to noncontrolling interest	(61)		0		0
Comprehensive loss attributable to Rentrak Corporation	$ (22,927)		$ (6,615)		$ (326)

[1] For the year ended March 31, 2013, 2012 and 2011, the amounts are net of deferred tax benefits (expenses) of $(30,000), $(101,000) and $19,000, respectively.

[2] For the year ended March 31, 2013, 2012 and 2011, the amounts are net of deferred tax benefits of $83,000, $31,000 and $5,000, respectively.