Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements of Comprehensive Income (Loss) (Unaudited) [Abstract]
Net (loss) income	$ (3,102,000)	$ (2,527,000)	$ (5,084,000)	$ 10,888,000
Other comprehensive (loss) income, net of tax:
Unrealized gain on short-term investments (net of tax of $0, $55,000, $0 and $133,000)	0	83,000	0	199,000
Foreign currency translation (loss) gain	(302,000)	247,000	(1,019,000)	1,084,000
Total other comprehensive (loss) gain, net of tax	(302,000)	330,000	(1,019,000)	1,283,000
Comprehensive (loss) income	$ (3,404,000)	$ (2,197,000)	$ (6,103,000)	$ 12,171,000