Summary of Significant Accounting Policies (Details 1) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Summary of Significant Accounting Policies
Raw material	$ 20,308	$ 18,157
Work in process	11,339	8,525
Finished goods	18,651	15,411
Total inventories	$ 50,298	$ 42,093

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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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