Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 31,551	$ 67,252
Restricted cash	0	65
Trade accounts receivable, net of allowance for doubtful accounts of $289 in 2021 and $6,824 in 2020	91,202	64,078
Inventories	69,098	76,658
Current assets associated with discontinued operations	0	710,006
Prepaid expenses and other current assets	18,539	13,487
Total current assets	210,390	931,546
Property, plant, and equipment:
Land and building	26,380	26,506
Machinery and equipment	345,454	365,296
Automobiles and trucks	16,174	18,446
Chemical plants	61,565	62,714
Construction in progress	5,349	1,526
Total property, plant, and equipment	454,922	474,488
Less accumulated depreciation	(365,946)	(377,632)
Net property, plant, and equipment	88,976	96,856
Other assets:
Other intangibles, net	36,958	41,487
Operating lease right-of-use assets	36,973	43,448
Investments	11,233	2,675
Other assets	13,736	16,827
Total other assets	98,900	104,437
Total assets	398,266	1,132,839
Current liabilities:
Trade accounts payable	37,943	22,573
Compensation and employee benefits	20,811	14,336
Operating lease liabilities, current portion	8,108	8,795
Accrued taxes	7,085	4,323
Accrued liabilities and other	21,810	14,012
Current liabilities associated with discontinued operations	1,385	734,039
Total current liabilities	97,142	798,078
Long-term debt, net	151,936	199,894
Operating lease liabilities	31,429	37,569
Asset retirement obligations	12,984	12,484
Deferred income taxes	1,669	1,942
Other liabilities	4,543	11,810
Total long-term liabilities	202,561	263,699
Commitments and contingencies (Note 11)
Equity:
Common stock, par value $0.01 per share; 250,000,000 shares authorized at December 31, 2021 and December 31, 2020; 130,075,838 shares issued at December 31, 2021, and 128,304,354 shares issued at December 31, 2020	1,301	1,289
Additional paid-in capital	475,624	472,134
Treasury stock, at cost; 3,138,675 shares held at December 31, 2021, and 2,953,976 shares held at December 31, 2020	(19,957)	(19,484)
Accumulated other comprehensive income (loss)	(46,932)	(49,914)
Retained deficit	(310,332)	(413,665)
Total TETRA stockholders’ equity	99,704	(9,640)
Noncontrolling interests	(1,141)	80,702
Total equity	98,563	71,062
Total liabilities and equity	$ 398,266	$ 1,132,839