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Balance Sheet - Continuing Operations (Tables)
6 Months Ended
Jul. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Accounts Receivable
 As of July 31, 2021As of January 31, 2021
 (in thousands)
Accounts receivable$5,581 $5,695 
Less allowance for doubtful accounts(481)(948)
Accounts receivable net of allowance for doubtful accounts$5,100 $4,747 
Schedule of Inventories
July 31, 2021January 31, 2021
 (in thousands)
Inventories:
Raw materials$7,468 $6,905 
Finished goods3,455 3,466 
Work in progress2,404 2,445 
13,327 12,816 
Less allowance for obsolescence(1,399)(1,363)
Total inventories, net$11,928 $11,453 
Schedule of Seismic Equipment Lease Pool and Property and Equipment
July 31, 2021January 31, 2021
 (in thousands)
Property and equipment:
Marine seismic service equipment$4,157 $5,969 
Land and buildings4,422 4,354 
Furniture and fixtures9,899 9,750 
Autos and trucks491 491 
18,969 20,564 
Accumulated depreciation and amortization(14,529)(15,813)
Total property and equipment, net$4,440 $4,751