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Note 5 - Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Raw materials	$ 5,755	$ 4,738
Work in process	426	329
Finished goods	4,997	9,163
Inventories, net	$ 11,178	$ 14,230

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

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

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