Condensed Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net loss	$ (425)		$ (656)		$ (1,444)		$ (1,854)
Other comprehensive income (loss):
Foreign currency translation adjustments	(411)		270		(385)		295
Unrealized holding losses which arose during the period on available-for-sale securities	(35)	[1]	(54)	[1]	(35)	[1]	(93)	[1]
Recognition of previously unrealized losses on available-for-sale securities included in net loss	0	[2]	2	[2]	0	[2]	2	[2]
Other comprehensive income (loss)	(446)		218		(420)		204
Comprehensive loss	(871)		(438)		(1,864)		(1,650)
Comprehensive loss attributable to noncontrolling interest	(51)		(22)		(104)		(29)
Comprehensive loss attributable to Rentrak Corporation	$ (820)		$ (416)		$ (1,760)		$ (1,621)

[1] For the three and six months ended both September 30, 2014 and 2013, the amounts are net of zero deferred taxes

[2] For the three and six months ended September 30, 2013, the amounts are net of zero deferred tax benefits.