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Business Segments (Income Statement by Segment) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]    
Revenues $ 541,068 $ 512,476
Operating income (loss) (44,493) (231,623)
Impairments of intangible assets, property and equipment 0 20,394
Loss (gain) on disposal of assets and other (1,052) 2,531
Depreciation and amortization 42,176 51,000
Capital expenditures 2,399 2,246
Operating Segments    
Segment Reporting Information [Line Items]    
Operating income (loss) (45,545) (208,698)
Operating Segments | Drilling & Downhole    
Segment Reporting Information [Line Items]    
Revenues 239,895 216,836
Operating income (loss) 4,749 (47,964)
Depreciation and amortization 14,536 17,895
Capital expenditures 1,476 462
Operating Segments | Completions    
Segment Reporting Information [Line Items]    
Revenues 185,018 118,685
Operating income (loss) (4,532) (97,304)
Depreciation and amortization 22,568 24,831
Capital expenditures 512 275
Operating Segments | Production    
Segment Reporting Information [Line Items]    
Revenues 116,710 177,510
Operating income (loss) (14,354) (33,418)
Depreciation and amortization 4,769 7,755
Capital expenditures 411 287
Intersegment Eliminations    
Segment Reporting Information [Line Items]    
Revenues (555) (555)
Corporate    
Segment Reporting Information [Line Items]    
Operating income (loss) (31,408) (30,012)
Depreciation and amortization 303 519
Capital expenditures $ 0 $ 1,222