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Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Inventories
Raw materials	$ 1,363	$ 1,382
Work-in-progress	1,274	1,266
Finished goods	2,225	1,321
Total inventories	$ 4,862	$ 3,969

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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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