Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Details)

v3.7.0.1
Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross $ 73,989 $ 73,989
Finite-Lived Intangible Assets, Accumulated Amortization (58,365) (53,601)
Finite-Lived Intangible Assets, Net 15,624 20,388
Backlog [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,530 1,530
Finite-Lived Intangible Assets, Accumulated Amortization (1,530) (1,530)
Finite-Lived Intangible Assets, Net 0 0
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 24,867 24,867
Finite-Lived Intangible Assets, Accumulated Amortization (13,547) (10,926)
Finite-Lived Intangible Assets, Net 11,320 13,941
Product Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 45,234 45,234
Finite-Lived Intangible Assets, Accumulated Amortization (41,431) (39,455)
Finite-Lived Intangible Assets, Net 3,803 5,779
Noncompete Agreements [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 510 510
Finite-Lived Intangible Assets, Accumulated Amortization (510) (510)
Finite-Lived Intangible Assets, Net 0 0
Trademarks and Trade Names [Member]    
Finite-Lived Intangible Assets [Line Items]    
Finite-Lived Intangible Assets, Gross 1,848 1,848
Finite-Lived Intangible Assets, Accumulated Amortization (1,347) (1,180)
Finite-Lived Intangible Assets, Net $ 501 $ 668