Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (Parenthetical) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on short-term investments, tax	$ (36,000)	$ (2,000)	$ (40,000)	$ 5,000