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Note 14 - Commitments and Contingencies (Details Textual) $ / shares in Units, $ in Thousands, $ in Millions					6 Months Ended		12 Months Ended
	Oct. 02, 2020 USD ($) $ / shares	Oct. 02, 2020 CAD ($)	Oct. 02, 2020 USD ($) $ / shares shares	Oct. 02, 2020 CAD ($) shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Sep. 30, 2021 shares
Increase (Decrease) in Other Employee-Related Liabilities | $					$ 845	$ 898
Share Price (in dollars per share) | $ / shares	$ 5.98		$ 5.98		$ 2.75
Assets Acquisition of Amika Mobile Corporation [Member]
Asset Purchase Agreement, Deduction From Liability	$ 799	$ 1	$ 799	$ 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)			191,267	191,267
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)			573,801	573,801	139,128
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $			$ 3,431
Assets Acquisition of Amika Mobile Corporation [Member] | Former Owner of Amika Mobile [Member]
Stock Issued During Period, Shares, Acquisitions (in shares)					69,564		365,109

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