Condensed Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,318)		$ (366)		$ (3,762)		$ (2,220)
Other comprehensive income (loss):
Foreign currency translation adjustments	(246)		77		(631)		372
Unrealized holding gains (losses) which arose during the period on available-for-sale securities	(122)	[1]	19	[1]	(157)	[1]	(74)	[1]
Recognition of previously unrealized losses on available-for-sale securities included in net loss	4	[2]	0	[2]	4	[2]	2	[2]
Other comprehensive income (loss)	(364)		96		(784)		300
Comprehensive loss	(2,682)		(270)		(4,546)		(1,920)
Comprehensive loss attributable to noncontrolling interest	(31)		(23)		(135)		(52)
Comprehensive loss attributable to Rentrak Corporation	$ (2,651)		$ (247)		$ (4,411)		$ (1,868)

[1] For the three and nine months ended both December 31, 2014 and 2013, the amounts are net of zero deferred taxes

[2] For the three and nine months ended both December 31, 2014 and 2013, the amounts are net of zero deferred tax benefits.