Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2013
Allowance for Doubtful Accounts
Balance at Beginning of Year	$ 466		$ 327		$ 140
Additions Charged to Costs and Expenses	279		571		639
Deductions	(329)	[1]	(432)	[1]	(452)	[1]
Balance At End of Year	$ 416		$ 466		$ 327

[1] The deductions related to allowance for doubtful accounts represent accounts receivable which are written off.