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Sale of Subsidiaries (Details)
$ in Thousands
1 Months Ended 12 Months Ended 15 Months Ended
Feb. 28, 2019
USD ($)
Aug. 31, 2018
USD ($)
payment
Jan. 31, 2020
USD ($)
Jan. 31, 2019
USD ($)
Jan. 31, 2018
USD ($)
Oct. 31, 2019
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Loss on sale of subsidiary     $ 0 $ 5,405 $ 0  
Cumulative translation loss     $ 0 $ 5,355 $ 0  
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 subsidiaries $ 660          
Proceeds in cash from sale of subsidiary $ 240          
Note receivable term (in years) 2 years          
Proceeds in note receivable from sale of subsidiary $ 420          
Working capital adjustment $ 114          
Mitcham Seismic Eurasia LLC | 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 subsidiaries   $ 1,200        
Proceeds in cash from sale of subsidiary           $ 705
Number of payments | payment   8        
Interest rate on payments due from sale of subsidiary   9.00%        
Loss on sale of subsidiary   $ 4,900        
Cumulative translation loss   $ 5,400