Note 3 - Correction of Immaterial Errors - Reconciliation of the Effects of the Adjustments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Other long-term liabilities $ 575 $ 1,347  
Total long-term liabilities 23,757 13,416  
Retained Earnings (Accumulated Deficit), Ending Balance (715) (4,291) $ (3,741)
Total stockholders' equity 55,629 51,701 51,174
Cost of Sales 98,617 105,647  
Gross profit 29,046 23,318  
Income from operations 5,940 2,722  
Income from operations before income taxes 5,035 1,600  
Net loss 3,576 (550)  
Comprehensive loss 2,696 (1,964)  
Other assets and liabilities (143) 529  
Accumulated deficit $ (715) (4,291) (3,741)
Stockholders' equity - revised     51,174
Previously Reported [Member]      
Other long-term liabilities   688  
Total long-term liabilities   12,757  
Retained Earnings (Accumulated Deficit), Ending Balance   (3,632) (3,103)
Total stockholders' equity   52,360 51,812
Cost of Sales   105,626  
Gross profit   23,339  
Income from operations   2,743  
Income from operations before income taxes   1,621  
Net loss   (529)  
Comprehensive loss   (1,943)  
Other assets and liabilities   508  
Accumulated deficit   (3,632) (3,103)
Revision of Prior Period, Adjustment [Member]      
Other long-term liabilities   659  
Total long-term liabilities   659  
Retained Earnings (Accumulated Deficit), Ending Balance   (659) (638)
Total stockholders' equity   (659) (638)
Cost of Sales   21  
Gross profit   (21)  
Income from operations   (21)  
Income from operations before income taxes   (21)  
Net loss   (21)  
Comprehensive loss   (21)  
Other assets and liabilities   21  
Accumulated deficit   $ (659) $ (638)