Condensed Consolidated Statements of Comprehensive Loss (unaudited) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss		$ (10,539)	$ (7,404)
Other comprehensive loss, net of tax:
Unrealized gain (loss) on investments	[1]	147	(1,653)
Loss on foreign currency translation		(145)	(137)
Other comprehensive loss, net of tax		2	(1,790)
Total comprehensive loss		$ (10,537)	$ (9,194)

[1] The amounts reclassified from accumulated other comprehensive loss and recorded in realized gain on short-term investments and interest income, net in the Condensed Consolidated Statement of Operations related to the sale of short-term investments were $27,000 and $1.4 million for the three months ended June 30, 2016 and 2015, respectively. Refer to Note 2, Certain Financial Statement Information, to the Condensed Consolidated Financial Statements for additional details.