Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Inventories
Refrigerant and cylinders	$ 106,673	$ 99,828
Less: net realizable value adjustments	(5,359)	(5,684)
Total	$ 101,314	$ 94,144

Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods.

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- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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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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