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Note 19 - Contract Balances, Performance Obligations and Contract Costs - Changes in Deferred Revenue and Contract Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 01, 2018
Jan. 31, 2020
Jan. 31, 2019
Balance $ 32,113 $ 35,091 $ 32,113
Recognition of previously deferred revenue   (30,580) (27,252)
Deferral of revenue   37,408 29,423
Increases from business combinations, net   551 1,789
Effect of movements in foreign exchange   (407) (982)
Balance   42,063 35,091
Current   41,143 34,236
Long-term   920  
Balance  
Adjustment for adoption of ASC 606 495    
Balance at February 1, 2018 $ 495 812 495
Transfers to trade receivables from contract assets   (490) (266)
Increases as a result of delivered term licenses recognized as revenue during the period, net of amounts transferred to trade receivables   791 606
Effect of movements in foreign exchange   (6) (23)
Balance   $ 1,107 $ 812