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Note 15 - Commitments and Contingencies (Details Textual)
$ / shares in Units, $ in Thousands, $ in Millions
 6 Months Ended
Oct. 02, 2020
USD ($)
$ / shares
shares
Oct. 02, 2020
CAD ($)
shares
Mar. 31, 2021
USD ($)
$ / shares
shares
Mar. 31, 2020
USD ($)
Increase (Decrease) in Other Employee-Related Liabilities     $ 898 $ 400
Share Price (in dollars per share) | $ / shares $ 5.98   $ 6.69  
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable     $ 3,431
Assets Acquisition of Amika Mobile Corporation [Member]        
Asset Purchase Agreement, Deduction From Liability $ 794 $ 1    
Asset Purchase Agreement, Deduction, Term (Year) 3 years 3 years    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Each Anniversaries (in shares) | shares 191,267 191,267 191,267  
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares 573,801 573,801 573,801  
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable $ 3,431   $ 3,431