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Note 15 - Share-based Compensation - Stock Options Outstanding (Details) - $ / shares	3 Months Ended		12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022
Lower Exercise Price (in dollars per share)	$ 1.31
Upper Exercise Price (in dollars per share)		$ 8.03
Number Outstanding (in shares)			4,814,537
Weighted Average Remaining Contractual Life (Year)			4 years 6 months 10 days
Weighted Average Exercise Price, Outstanding (in dollars per share)			$ 3.10
Number Exercisable (in shares)			1,871,879
Weighted Average Exercise Price, Exercisable (in dollars per share)			$ 2.83
Weighted average exercise price, outstanding balance (in dollars per share)			3.10
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in dollars per share)			2.83
Range One [Member]
Lower Exercise Price (in dollars per share)			1.31
Upper Exercise Price (in dollars per share)			$ 1.86
Number Outstanding (in shares)			223,922
Weighted Average Remaining Contractual Life (Year)			1 year 1 month 13 days
Weighted Average Exercise Price, Outstanding (in dollars per share)			$ 1.69
Number Exercisable (in shares)			223,922
Weighted Average Exercise Price, Exercisable (in dollars per share)			$ 1.69
Weighted average exercise price, outstanding balance (in dollars per share)			1.69
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in dollars per share)			1.69
Range Two [Member]
Lower Exercise Price (in dollars per share)			1.99
Upper Exercise Price (in dollars per share)			$ 1.99
Number Outstanding (in shares)			937,500
Weighted Average Remaining Contractual Life (Year)			1 year 2 months 4 days
Weighted Average Exercise Price, Outstanding (in dollars per share)			$ 1.99
Number Exercisable (in shares)			937,500
Weighted Average Exercise Price, Exercisable (in dollars per share)			$ 1.99
Weighted average exercise price, outstanding balance (in dollars per share)			1.99
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in dollars per share)			1.99
Range Three [Member]
Lower Exercise Price (in dollars per share)			2.69
Upper Exercise Price (in dollars per share)			$ 3.21
Number Outstanding (in shares)			1,224,000
Weighted Average Remaining Contractual Life (Year)			6 years 9 months 10 days
Weighted Average Exercise Price, Outstanding (in dollars per share)			$ 2.74
Number Exercisable (in shares)			0
Weighted Average Exercise Price, Exercisable (in dollars per share)			$ 0
Weighted average exercise price, outstanding balance (in dollars per share)			2.74
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in dollars per share)			0
Range Four [Member]
Lower Exercise Price (in dollars per share)			3.39
Upper Exercise Price (in dollars per share)			$ 3.48
Number Outstanding (in shares)			1,965,865
Weighted Average Remaining Contractual Life (Year)			5 years 3 months 7 days
Weighted Average Exercise Price, Outstanding (in dollars per share)			$ 3.44
Number Exercisable (in shares)			458,291
Weighted Average Exercise Price, Exercisable (in dollars per share)			$ 3.40
Weighted average exercise price, outstanding balance (in dollars per share)			3.44
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in dollars per share)			3.40
Range Five [Member]
Lower Exercise Price (in dollars per share)			3.95
Upper Exercise Price (in dollars per share)			$ 8.03
Number Outstanding (in shares)			463,250
Weighted Average Remaining Contractual Life (Year)			3 years 10 months 24 days
Weighted Average Exercise Price, Outstanding (in dollars per share)			$ 5.50
Number Exercisable (in shares)			252,166
Weighted Average Exercise Price, Exercisable (in dollars per share)			$ 5.90
Weighted average exercise price, outstanding balance (in dollars per share)			5.50
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price (in dollars per share)			$ 5.90

X

- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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