Summary of Significant Accounting Policies (Goodwill and Other Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 4,409	$ 4,409
Impairments	(4,409)	0
Goodwill, ending balance	0	4,409	$ 4,409
Gross Carrying Amount	8,991	9,063
Accumulated Amortization	(3,943)	(2,728)
Intangible Assets, Net	$ 5,048	6,335
Intangible assets, useful life	6 years 1 month 24 days
Finite-Lived Intangible Assets, Estimated Amortization Expense
Fiscal 2017	$ 877
Fiscal 2018	602
Fiscal 2019	426
Fiscal 2020	340
Fiscal 2021	266
Thereafter	581
Total	3,092
Amortization expense	1,215	1,327	704
Cost of Sales
Finite-Lived Intangible Assets, Estimated Amortization Expense
Amortization expense	139	132	135
Operating Expenses
Finite-Lived Intangible Assets, Estimated Amortization Expense
Amortization expense	1,076	1,195	569
Patents
Goodwill [Roll Forward]
Gross Carrying Amount	2,377	2,447
Accumulated Amortization	(1,053)	(906)
Intangible Assets, Net	1,324	1,541
Patents | Cost of Sales
Finite-Lived Intangible Assets, Estimated Amortization Expense
Amortization expense	139	132	135
Patents | Operating Expenses
Finite-Lived Intangible Assets, Estimated Amortization Expense
Amortization expense	$ 9	0	0
Patents | Minimum
Goodwill [Roll Forward]
Intangible assets, useful life	10 years
Patents | Maximum
Goodwill [Roll Forward]
Intangible assets, useful life	17 years
Licenses
Goodwill [Roll Forward]
Gross Carrying Amount	$ 58	58
Accumulated Amortization	(58)	(58)
Intangible Assets, Net	$ 0	0
Licenses | Minimum
Goodwill [Roll Forward]
Intangible assets, useful life	7 years
Licenses | Maximum
Goodwill [Roll Forward]
Intangible assets, useful life	13 years
Trade name and trademarks
Goodwill [Roll Forward]
Gross Carrying Amount	$ 1,956	1,958
Accumulated Amortization	0	0
Intangible Assets, Net	1,956	1,958
Customer relationships
Goodwill [Roll Forward]
Gross Carrying Amount	3,600	3,600
Accumulated Amortization	(2,512)	(1,620)
Intangible Assets, Net	1,088	1,980
Customer relationships | Operating Expenses
Finite-Lived Intangible Assets, Estimated Amortization Expense
Amortization expense	$ 891	1,085	535
Customer relationships | Minimum
Goodwill [Roll Forward]
Intangible assets, useful life	5 years
Customer relationships | Maximum
Goodwill [Roll Forward]
Intangible assets, useful life	8 years
Developed technology
Goodwill [Roll Forward]
Gross Carrying Amount	$ 900	900
Accumulated Amortization	(265)	(109)
Intangible Assets, Net	$ 635	791
Intangible assets, useful life	8 years
Developed technology | Operating Expenses
Finite-Lived Intangible Assets, Estimated Amortization Expense
Amortization expense	$ 156	90	19
Non-competition agreements
Goodwill [Roll Forward]
Gross Carrying Amount	100	100
Accumulated Amortization	(55)	(35)
Intangible Assets, Net	$ 45	65
Intangible assets, useful life	5 years
Non-competition agreements | Operating Expenses
Finite-Lived Intangible Assets, Estimated Amortization Expense
Amortization expense	$ 20	$ 20	$ 15