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Fair Value Measurements (Details) - USD ($)
 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Forward Foreign Currency Exchange Contracts [Member]    
Other liabilities [Abstract]    
Net gain on forward foreign currency exchange contracts $ 752,000 $ 843,000
Supplier Warrant [Member]    
Change in warrant liability measured at fair value recurring basis using significant unobservable inputs (Level 3) [Roll Forward]    
Beginning balance 11,879,000 15,643,000
Newly issued 0 0
Total (gain) loss included in net income (2,313,000) (3,764,000)
Exercises/settlements [1] (9,566,000) 0
Net transfers in (out) of Level 3 0 0
Ending balance 0 11,879,000
Contingent Consideration [Member]    
Change in warrant liability measured at fair value recurring basis using significant unobservable inputs (Level 3) [Roll Forward]    
Beginning balance 0 330,000
Newly issued 0 0
Total (gain) loss included in net income 0 (16,000)
Exercises/settlements 0 (314,000)
Net transfers in (out) of Level 3 0 0
Ending balance 0 0
Recurring [Member]    
Short-Term Investments [Abstract]    
Mutual funds 2,828,000 2,140,000
Prepaid Expense and Other Current Assets [Abstract]    
Forward foreign currency exchange contracts 1,179,000 427,000
Other current liabilities [Abstract]    
Deferred compensation 2,828,000 2,140,000
Other liabilities [Abstract]    
Warrant liability 0 11,879,000
Recurring [Member] | Level 1 [Member]    
Short-Term Investments [Abstract]    
Mutual funds 2,828,000 2,140,000
Prepaid Expense and Other Current Assets [Abstract]    
Forward foreign currency exchange contracts 0 0
Other current liabilities [Abstract]    
Deferred compensation 2,828,000 2,140,000
Other liabilities [Abstract]    
Warrant liability 0 0
Recurring [Member] | Level 2 [Member]    
Short-Term Investments [Abstract]    
Mutual funds 0 0
Prepaid Expense and Other Current Assets [Abstract]    
Forward foreign currency exchange contracts 1,179,000 427,000
Other current liabilities [Abstract]    
Deferred compensation 0 0
Other liabilities [Abstract]    
Warrant liability 0 0
Recurring [Member] | Level 3 [Member]    
Short-Term Investments [Abstract]    
Mutual funds 0 0
Prepaid Expense and Other Current Assets [Abstract]    
Forward foreign currency exchange contracts 0 0
Other current liabilities [Abstract]    
Deferred compensation 0 0
Other liabilities [Abstract]    
Warrant liability $ 0 $ 11,879,000
[1] Represents the fair value of the Supplier Warrant as of the exercise date (see Note 11).