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Fair Value Measurements (Details) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Mar. 31, 2016
Forward Foreign Currency Exchange Contracts [Member]          
Other liabilities [Abstract]          
Net loss on forward foreign currency exchange contracts $ (507,000) $ (527,000) $ (1,186,000) $ (349,000)  
Supplier Warrant [Member]          
Fair value assumptions of warrants [Abstract]          
Risk free interest rate     0.59%    
Expected life in years     1 year    
Expected volatility     39.00%    
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 10,054,000 11,648,000 $ 15,643,000 10,506,000  
Newly issued 0 0 0 0  
Total (gain) loss included in net income (loss) 824,000 600,000 (4,765,000) 1,742,000  
Exercises/settlements 0 0 0 0  
Net transfers in (out) of Level 3 0 0 0 0  
Ending balance 10,878,000 12,248,000 10,878,000 12,248,000  
Contingent Consideration [Member]          
Change in warrant liability measured at fair value recurring basis using significant unobservable inputs (Level 3) [Rollforward]          
Beginning balance 314,000 1,320,000 330,000 0  
Newly issued 0 0 0 1,320,000  
Total (gain) loss included in net income (loss) 0 20,000 (16,000) 20,000  
Exercises/settlements (314,000) 0 (314,000) 0  
Net transfers in (out) of Level 3 0 0 0 0  
Ending balance 0 $ 1,340,000 0 $ 1,340,000  
Recurring [Member]          
Short-term investments [Abstract]          
Mutual funds 2,233,000   2,233,000   $ 1,813,000
Accrued liabilities [Abstract]          
Contingent consideration 0   0   224,000
Other current liabilities [Abstract]          
Deferred compensation 2,233,000   2,233,000   1,813,000
Forward foreign currency exchange contracts 1,602,000   1,602,000   416,000
Other liabilities [Abstract]          
Warrant liability 10,878,000   10,878,000   15,643,000
Contingent consideration 0   0   106,000
Recurring [Member] | Level 1 [Member]          
Short-term investments [Abstract]          
Mutual funds 2,233,000   2,233,000   1,813,000
Accrued liabilities [Abstract]          
Contingent consideration 0   0   0
Other current liabilities [Abstract]          
Deferred compensation 2,233,000   2,233,000   1,813,000
Forward foreign currency exchange contracts 0   0   0
Other liabilities [Abstract]          
Warrant liability 0   0   0
Contingent consideration 0   0   0
Recurring [Member] | Level 2 [Member]          
Short-term investments [Abstract]          
Mutual funds 0   0   0
Accrued liabilities [Abstract]          
Contingent consideration 0   0   0
Other current liabilities [Abstract]          
Deferred compensation 0   0   0
Forward foreign currency exchange contracts 1,602,000   1,602,000   416,000
Other liabilities [Abstract]          
Warrant liability 0   0   0
Contingent consideration 0   0   0
Recurring [Member] | Level 3 [Member]          
Short-term investments [Abstract]          
Mutual funds 0   0   0
Accrued liabilities [Abstract]          
Contingent consideration 0   0   224,000
Other current liabilities [Abstract]          
Deferred compensation 0   0   0
Forward foreign currency exchange contracts 0   0   0
Other liabilities [Abstract]          
Warrant liability 10,878,000   10,878,000   15,643,000
Contingent consideration $ 0   $ 0   $ 106,000