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Segments and Related Information - Financial Information by Business Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Segment Reporting Information [Line Items]                
Revenues $ 140,528   $ 134,759     $ 411,841 $ 500,698  
Depreciation and amortization 19,657   24,251     62,086 75,306  
Operating income (loss) (16,139)   (30,840)     (53,519) (505,976)  
Capital expenditures 3,666   2,362     10,977 11,277  
Total assets 1,091,899   1,180,786     1,091,899 1,180,786 $ 1,152,260
Impairments of inventories 2,113   5,921   $ 25,230 2,113 31,151  
Fixed assets 0 $ 650 0 $ 2,992 5,198 3,444 8,190  
Impairments of goodwill 0   0   406,056 0 406,056  
Corporate                
Segment Reporting Information [Line Items]                
Revenues 0   0     0 0  
Depreciation and amortization 238   219     621 563  
Operating income (loss) (7,618)   (8,249)     (25,526) (25,633)  
Capital expenditures 408   19     977 (377)  
Total assets 80,309   90,476     80,309 90,476  
Impairments of inventories 0   0   0      
Fixed assets   0   0 0      
Impairments of goodwill         0      
Offshore/Manufactured Products                
Segment Reporting Information [Line Items]                
Revenues 69,003   78,674     206,520 264,782  
Impairments of inventories             16,200  
Impairments of goodwill             86,500  
Offshore/Manufactured Products | Operating Segments                
Segment Reporting Information [Line Items]                
Revenues 69,003   78,674     206,520 264,782  
Depreciation and amortization 5,662   5,401     16,688 16,505  
Operating income (loss) 1,764   3,875     7,645 (82,202)  
Capital expenditures 677   686     1,932 2,208  
Total assets 525,894   541,661     525,894 541,661  
Impairments of inventories 0   0   16,249      
Fixed assets   0   0 0      
Impairments of goodwill         86,500      
Downhole Technologies                
Segment Reporting Information [Line Items]                
Revenues 25,527   18,713     77,717 74,743  
Impairments of inventories 2,100   5,900     2,100 5,900  
Impairments of goodwill             192,500  
Downhole Technologies | Operating Segments                
Segment Reporting Information [Line Items]                
Revenues 25,527   18,713     77,717 74,743  
Depreciation and amortization 4,226   5,701     13,136 16,904  
Operating income (loss) (5,035)   (12,594)     (8,945) (216,395)  
Capital expenditures 378   78     658 2,892  
Total assets 275,095   294,768     275,095 294,768  
Impairments of inventories 2,113   5,921   0      
Fixed assets   0   0 0      
Impairments of goodwill         192,502      
Well Site Services                
Segment Reporting Information [Line Items]                
Revenues 45,998   37,372     127,604 161,173  
Impairments of inventories             9,000  
Fixed assets           3,400    
Impairments of goodwill             127,100  
Well Site Services | Well Site Services Drilling Services                
Segment Reporting Information [Line Items]                
Fixed assets         5,200   8,200  
Well Site Services | Operating Segments                
Segment Reporting Information [Line Items]                
Revenues 45,998   37,372     127,604 161,173  
Depreciation and amortization 9,531   12,930     31,641 41,334  
Operating income (loss) (5,250)   (13,872)     (26,693) (181,746)  
Capital expenditures 2,203   1,579     7,410 6,554  
Total assets 210,601   253,881     $ 210,601 $ 253,881  
Impairments of inventories $ 0   $ 0   8,981      
Fixed assets   $ 650   $ 2,992 5,198      
Impairments of goodwill         $ 127,054