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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance balance $ (2,518,000) $ (877,000)
Other comprehensive (loss) income, net of tax (2,334,000) (1,639,000)
Amounts reclassified from other comprehensive income (loss), net of tax 0 (2,000)
Ending balance (4,852,000) (2,518,000)
Unrealized Gain (Loss) on Short-Term Investments [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance balance 345,000 321,000
Other comprehensive (loss) income, net of tax (13,000) 26,000
Amounts reclassified from other comprehensive income (loss), net of tax 0 (2,000)
Ending balance 332,000 345,000
Foreign Currency Translation [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Balance balance (2,863,000) (1,198,000)
Other comprehensive (loss) income, net of tax (2,321,000) (1,665,000)
Amounts reclassified from other comprehensive income (loss), net of tax 0 0
Ending balance $ (5,184,000) $ (2,863,000)