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Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Allowance for obsolescence	$ 37	$ 64	$ 221
Raw materials - current	16,213	17,528
Work-in-process	1,118	1,801
Inventory - current	17,331	19,329
Raw materials - long term (net of allowances of $37 and $64, respectively)	1,495	1,582
Inventory - total	$ 18,826	$ 20,911

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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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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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