Summary of Significant Accounting Policies - Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2016	Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	6 years 2 months 5 days
Gross Carrying Amount	$ 9,204	$ 8,991
Accumulated Amortization	(4,425)	(3,943)
Net	4,779	5,048
Finite-Lived Intangible Assets, Estimated Amortization Expense
Fiscal 2017	415
Fiscal 2018	616
Fiscal 2019	440
Fiscal 2020	354
Fiscal 2021	280
Fiscal 2022	162
Thereafter	547
Total	2,814
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,581	2,377
Accumulated Amortization	(1,135)	(1,053)
Net	1,446	1,324
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	58	58
Accumulated Amortization	(58)	(58)
Net	0	0
Trade name and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,965	1,956
Accumulated Amortization	0	0
Net	1,965	1,956
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,600	3,600
Accumulated Amortization	(2,821)	(2,512)
Net	$ 779	1,088
Developed technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	8 years
Gross Carrying Amount	$ 900	900
Accumulated Amortization	(346)	(265)
Net	$ 554	635
Non-competition agreement
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	5 years
Gross Carrying Amount	$ 100	100
Accumulated Amortization	(65)	(55)
Net	$ 35	$ 45
Minimum | Patents
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	10 years
Minimum | Licenses
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	7 years
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	5 years
Maximum | Patents
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	17 years
Maximum | Licenses
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	13 years
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, estimated economic useful life (years)	8 years