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Supplemental Financial Information (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2014	Mar. 31, 2014
Inventories
Materials and supplies	1,597	$ 1,320
Work in process	191	175
Finished goods	985	1,051
Total inventories	2,773us-gaap_InventoryNet	$ 2,546us-gaap_InventoryNet
Minimum \| Property and equipment
Property and Equipment
Useful life	3 years
Maximum \| Property and equipment
Property and Equipment
Useful life	8 years

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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