Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts [Line Items]
Balance at Beginning of Year	$ 2,921		$ 2,554		$ 2,219
Gross Amount Charged to Cost and Expenses	699		831		1,082
Other Charges/ (Deductions)	(363)		(464)		(747)
Balance at End of Year	2,471		2,921		2,554
Charged to Other Accounts	(786)
Allowance for Doubtful Accounts [Member]
Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts [Line Items]
Balance at Beginning of Year	793		781		804
Gross Amount Charged to Cost and Expenses	(292)		12		72
Other Charges/ (Deductions)					(95)	[1]
Balance at End of Year	501		793		781
Inventory Valuation Reserve [Member]
Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts [Line Items]
Balance at Beginning of Year	1,091		1,015		1,415
Gross Amount Charged to Cost and Expenses	1,011		540		252
Other Charges/ (Deductions)	(363)	[2]	(464)	[2]	(652)	[2]
Balance at End of Year	953		1,091		1,015
Charged to Other Accounts	(786)	[3]
Valuation Allowance of Deferred Tax Assets [Member]
Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts [Line Items]
Balance at Beginning of Year	1,037		758
Gross Amount Charged to Cost and Expenses	(20)		279		758
Balance at End of Year	$ 1,017		$ 1,037		$ 758

[1] Write off of uncollected accounts

[2] Disposal of slow moving and obsolete inventory

[3] Represents amounts related to assets held for sale