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Note 6 - Balance Sheet - Continuing Operations (Tables) | 9 Months Ended
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Oct. 31, 2021
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
|  | As of October 31, 2021 |  |  | As of January 31, 2021 |
|  | (in thousands) |
Accounts receivable |  | $ | 9,959 |  |  | $ | 5,695 |
Less allowance for doubtful accounts |  |  | (481 | ) |  |  | (948 | )
Accounts receivable net of allowance for doubtful accounts |  | $ | 9,478 |  |  | $ | 4,747 |
Schedule of Inventory, Current [Table Text Block] |
|  | October 31, 2021 |  |  | January 31, 2021 |
|  | (in thousands) |
Inventories: |  |  |  |  |  |  |  |
Raw materials |  | $ | 6,796 |  |  | $ | 6,905 |
Finished goods |  |  | 3,561 |  |  |  | 3,466 |
Work in progress |  |  | 2,478 |  |  |  | 2,445 |
|  |  | 12,835 |  |  |  | 12,816 |
Less allowance for obsolescence |  |  | (1,337 | ) |  |  | (1,363 | )
Total inventories, net |  | $ | 11,498 |  |  | $ | 11,453 |
Property, Plant and Equipment [Table Text Block] |
|  | October 31, 2021 |  |  | January 31, 2021 |
|  | (in thousands) |
Property and equipment: |  |  |  |  |  |  |  |
Marine seismic service equipment |  | $ | 3,912 |  |  | $ | 5,969 |
Land and buildings |  |  | 4,479 |  |  |  | 4,354 |
Furniture and fixtures |  |  | 9,962 |  |  |  | 9,750 |
Autos and trucks |  |  | 495 |  |  |  | 491 |
|  |  | 18,848 |  |  |  | 20,564 |
Accumulated depreciation and amortization |  |  | (14,502 | ) |  |  | (15,813 | )
Total property and equipment, net |  | $ | 4,346 |  |  | $ | 4,751 |

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