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Sale of Subsidiary (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Feb. 28, 2019
Jan. 31, 2021
Sep. 09, 2021
Aug. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from sale of subsidiary     $ 4,500  
Seismic Asia Pacific Pty Ltd | Disposal Group, Disposed of by Sale, Not Discontinued Operations        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from sale of subsidiary $ 660,000      
Proceeds in cash from sale of subsidiary $ 240,000      
Note receivable term (in years) 2 years      
Proceeds in note receivable from sale of subsidiary $ 420,000      
Working capital adjustment       $ 114,000
Proceeds from note receivable   $ 124,000