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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
Jan. 31, 2021
Jan. 31, 2020
Balance $ 42,063 $ 35,091
Recognition of previously deferred revenue (37,843) (30,580)
Deferral of revenue 46,386 37,408
Increases from business combinations, net 39 551
Effect of movements in foreign exchange 646 (407)
Balance 51,291 42,063
Current 49,878 41,143
Long-term 1,413  
Balance   812
Transfers to trade receivables from contract assets (563) (490)
Increases as a result of delivered term licenses recognized as revenue during the period, net of amounts transferred to trade receivables 783 791
Effect of movements in foreign exchange 26 (6)
Balance $ 1,353 $ 1,107