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Fair Value Measurements (Details) - USD ($)
 3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2017
Forward Foreign Currency Exchange Contracts [Member]      
Other liabilities [Abstract]      
Net gain (loss) on forward foreign currency exchange contracts $ 1,052,000 $ (679,000)  
Supplier Warrant [Member]      
Fair value assumptions of warrants [Abstract]      
Risk free interest rate 1.03%    
Expected life in years 3 months    
Expected volatility 27.20%    
Dividend yield 0.00%    
Probability of future financing 0.00%    
Change in warrant liability measured at fair value recurring basis using significant unobservable inputs (Level 3) [Rollforward]      
Beginning balance $ 11,879,000 15,643,000  
Newly issued 0 0  
Total (gain) loss included in net income (loss) (1,293,000) (5,589,000)  
Exercises/settlements 0 0  
Net transfers in (out) of Level 3 0 0  
Ending balance 10,586,000 10,054,000  
Contingent Consideration [Member]      
Change in warrant liability measured at fair value recurring basis using significant unobservable inputs (Level 3) [Rollforward]      
Beginning balance 0 330,000  
Newly issued 0 0  
Total (gain) loss included in net income (loss) 0 (16,000)  
Exercises/settlements 0 0  
Net transfers in (out) of Level 3 0 0  
Ending balance 0 $ 314,000  
Recurring [Member]      
Short-term investments [Abstract]      
Mutual funds 2,407,000   $ 2,140,000
Prepaid expenses and other current assets [Abstract]      
Forward foreign currency exchange contracts 1,479,000   427,000
Other current liabilities [Abstract]      
Deferred compensation 2,407,000   2,140,000
Other liabilities [Abstract]      
Warrant liability 10,586,000   11,879,000
Recurring [Member] | Level 1 [Member]      
Short-term investments [Abstract]      
Mutual funds 2,407,000   2,140,000
Prepaid expenses and other current assets [Abstract]      
Forward foreign currency exchange contracts 0   0
Other current liabilities [Abstract]      
Deferred compensation 2,407,000   2,140,000
Other liabilities [Abstract]      
Warrant liability 0   0
Recurring [Member] | Level 2 [Member]      
Short-term investments [Abstract]      
Mutual funds 0   0
Prepaid expenses and other current assets [Abstract]      
Forward foreign currency exchange contracts 1,479,000   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 expenses 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 $ 10,586,000   $ 11,879,000