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Note 4 - Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Raw materials	$ 7,485	$ 9,059
Work-in-process	379	380
Finished goods	3,154	3,152
Less: reserve	(3,412)	(3,363)
Inventories, net	$ 7,606	$ 9,228

X

- Definition

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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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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