Goodwill and Intangible Assets (Details 1) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 73,989	$ 73,989
Finite-Lived Intangible Assets, Accumulated Amortization	(53,601)	(48,047)
Finite-Lived Intangible Assets, Net	20,388	25,942
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	(10,926)	(7,917)
Finite-Lived Intangible Assets, Net	13,941	16,950
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	45,234	45,234
Finite-Lived Intangible Assets, Accumulated Amortization	(39,455)	(37,370)
Finite-Lived Intangible Assets, Net	5,779	7,864
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	510	510
Finite-Lived Intangible Assets, Accumulated Amortization	(510)	(276)
Finite-Lived Intangible Assets, Net	0	234
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	(1,180)	(954)
Finite-Lived Intangible Assets, Net	$ 668	$ 894