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Financial Risk Management and Derivatives (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Mar. 31, 2019
Foreign Currency Exchange Contracts [Abstract]          
Forward foreign currency exchange contracts included in prepaid and other current assets $ 1,223,000   $ 1,223,000   $ 207,000
Forward Foreign Currency Exchange Contracts [Member]          
Foreign Currency Exchange Contracts [Abstract]          
Notional amount of foreign currency derivatives 40,645,000   40,645,000   $ 32,524,000
Forward Foreign Currency Exchange Contracts [Member] | General and Administrative Expenses [Member]          
Foreign Currency Exchange Contracts [Abstract]          
Forward foreign currency exchange contracts $ 1,644,000 $ (860,000) $ 1,016,000 $ (1,628,000)  
Forward Foreign Currency Exchange Contracts [Member] | Maximum [Member]          
Foreign Currency Exchange Contracts [Abstract]          
Derivative, term of contract     1 year