Condensed Consolidated Statements of Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (3,471)	$ (1,900)
Other comprehensive (loss) income:
Net unrealized gains (losses) on investments, net of tax	64	(66)
Change in foreign currency translation adjustment	(2,168)	232
Reclassification of cumulative translation adjustment to net loss upon liquidation of subsidiaries, net of tax		188
Total other comprehensive (loss) income	(2,104)	354
Comprehensive loss	$ (5,575)	$ (1,546)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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