Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues from external customers		$ 95,474	$ 73,484	$ 275,124	$ 302,257
Cost of Goods and Services Sold [Abstract]
Depreciation, amortization, and accretion		8,308	9,657	25,495	28,934
Impairment and other charges		0	97	449	97
Insurance recoveries associated with damaged equipment		0	52	110	126
Total cost of revenues		79,727	63,269	235,075	247,194
Gross profit		15,747	10,215	40,049	55,063
General and administrative expense		18,714	16,123	56,077	60,333
Interest expense, net		4,083	4,338	12,373	14,234
Warrants fair value adjustment expense (income)		(3,164)	0	(143)	(327)
Other income, net		(6,968)	(788)	(14,295)	(1,308)
Income (loss) before taxes and discontinued operations		3,082	(9,458)	(13,963)	(17,869)
Provision for income taxes		587	101	2,139	1,877
Income (loss) before discontinued operations		2,495	(9,559)	(16,102)	(19,746)
Total loss from discontinued operations		18	(12,039)	120,882	(49,195)
Net income (loss)		2,513	(21,598)	104,780	(68,941)
(Income) loss attributable to noncontrolling interest	[1]	0	8,296	(306)	32,833
Net income (loss) attributable to TETRA stockholders		$ 2,513	$ (13,302)	$ 104,474	$ (36,108)
Basic net income (loss) per common share:
Income (Loss) from Continuing Operations, Per Basic Share		$ 0.02	$ (0.08)	$ (0.13)	$ (0.16)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share		0	(0.02)	0.96	(0.13)
Net income (loss) attributable to TETRA stockholders, per basic share		$ 0.02	$ (0.10)	$ 0.83	$ (0.29)
Weighted Average Number of Shares Outstanding, Basic		126,733	125,893	126,489	125,789
Diluted net income (loss) per common share:
Income (Loss) from Continuing Operations, Per Diluted Share		$ 0.02	$ (0.08)	$ (0.13)	$ (0.16)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share		0	(0.02)	0.96	(0.13)
Net income (loss) attributable to TETRA stockholders, per diluted share		$ 0.02	$ (0.10)	$ 0.83	$ (0.29)
Weighted Average Number of Shares Outstanding, Diluted		128,694	125,893	126,489	125,789
Product sales
Revenues from external customers		$ 46,340	$ 50,009	$ 153,955	$ 187,475
Cost of Goods and Services Sold [Abstract]
Cost of product sales		31,805	32,342	106,265	122,661
Services
Revenues from external customers		49,134	23,475	121,169	114,782
Cost of Goods and Services Sold [Abstract]
Cost of product sales		$ 39,614	$ 21,225	$ 102,976	$ 95,628

[1] (Income) loss attributable to noncontrolling interest includes zero and $8,342 loss for the three-month periods ended September 30, 2021 and 2020, respectively, and $333 income and $32,957 loss for the nine-month periods ended September 30, 2021 and 2020, respectively, related to discontinued operations.