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Supplemental Financial Information (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013
Inventories
Materials and supplies	$ 1,307	$ 1,504
Work in process	139	105
Finished goods	627	856
Total inventories	$ 2,073	$ 2,465

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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