Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Total Allowance for Doubtful Accounts
Balance at Beginning of Year		$ 586	$ 416	$ 466
Additions Charged to Expenses		941	509	279
Deductions	[1]	(573)	(339)	(329)
Balance At End of Year		$ 954	$ 586	$ 416

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