Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 32,851	$ 31,551
Trade accounts receivable, net of allowances of $377 in 2022 and $289 in 2021	103,461	91,202
Inventories	64,649	69,098
Prepaid expenses and other current assets	16,286	18,539
Total current assets	217,247	210,390
Property, plant, and equipment:
Land and building	25,143	26,380
Machinery and equipment	347,336	345,454
Automobiles and trucks	15,630	16,174
Chemical plants	61,084	61,565
Construction in progress	8,298	5,349
Total property, plant, and equipment	457,491	454,922
Less accumulated depreciation	(368,100)	(365,946)
Net property, plant, and equipment	89,391	88,976
Other assets:
Patents, trademarks and other intangible assets, net of accumulated amortization of $45,020 in 2022 and $44,323 in 2021	35,846	36,958
Operating lease right-of-use assets	37,313	36,973
Investments	12,333	11,233
Other assets	14,638	13,736
Total other assets	100,130	98,900
Total assets	406,768	398,266
Current liabilities:
Trade accounts payable	39,826	37,943
Current portion of long-term debt	1,533	0
Compensation and employee benefits	18,421	20,811
Operating lease liabilities, current portion	8,502	8,108
Accrued taxes	6,252	7,085
Accrued liabilities and other	21,125	21,810
Current liabilities associated with discontinued operations	1,379	1,385
Total current liabilities	97,038	97,142
Long-term debt, net	152,531	151,936
Operating lease liabilities	31,266	31,429
Asset retirement obligations	13,120	12,984
Deferred income taxes	1,635	1,669
Other liabilities	4,276	4,543
Total long-term liabilities	202,828	202,561
Commitments and contingencies
Equity:
Common stock, par value 0.01 per share; 250,000,000 shares authorized at March 31, 2022 and December 31, 2021; 130,829,770 shares issued at March 31, 2022 and 130,075,838 shares issued at December 31, 2021	1,308	1,301
Additional paid-in capital	476,055	475,624
Treasury stock, at cost; 3,138,675 shares held at March 31, 2022, and 3,138,675 shares held at December 31, 2021	(19,957)	(19,957)
Accumulated other comprehensive loss	(46,740)	(46,932)
Retained deficit	(302,612)	(310,332)
Total TETRA stockholders’ equity	108,054	99,704
Noncontrolling interests	(1,152)	(1,141)
Total equity	106,902	98,563
Total liabilities and equity	$ 406,768	$ 398,266