Summary of Significant Accounting Policies - Concentration Risk (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($) customer supplier financial_instituion	Jun. 30, 2015 USD ($) customer supplier	Mar. 31, 2016 USD ($) customer	Mar. 31, 2015 USD ($)
Concentration Risk [Line Items]
Number of financial institutions (financial institution) | financial_instituion	3
Product warranty accrual | $	$ 1,038	$ 1,062	$ 864	$ 1,015
Cost of Sales | Supplier Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	10.00%
Concentration risk, number of entities involved in risk calculation | supplier	0	0
Sales Revenue, Services, Net | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	10.00%
Concentration risk, number of entities involved in risk calculation | customer	0	0
Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%		10.00%
Concentration risk, number of entities involved in risk calculation | customer	0		1
Orion Engineered Systems
Concentration Risk [Line Items]
Product warranty accrual | $	$ 310	$ 310