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Note 3 - Inventories (Details) - Summary of Inventories - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015
Summary of Inventories [Abstract]
Raw materials	$ 10,381	$ 10,366
Work-in-process	995	530
Finished goods	1,962	1,913
Less: reserve	(467)	(389)
	$ 12,871	$ 12,420

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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