Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements of Comprehensive (Loss) Income (Unaudited) [Abstract]
Net (loss) income	$ (1,392,000)	$ 1,475,000	$ 518,000	$ 5,424,000
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on short-term investments (net of tax of $(36,000), $(2,000), $(40,000), and $5,000)	(53,000)	(3,000)	(59,000)	7,000
Foreign currency translation loss	(1,424,000)	(513,000)	(1,773,000)	(468,000)
Total other comprehensive loss, net of tax	(1,477,000)	(516,000)	(1,832,000)	(461,000)
Comprehensive (loss) income	$ (2,869,000)	$ 959,000	$ (1,314,000)	$ 4,963,000