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Note 12 - Stock-based Compensation - Summary of Outstanding Options (Details)	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Time Vesting Options [Member]
Shares Outstanding (in shares) | shares	662,798
Outstanding, Weighted Average Remaining Contractual Term (Year)	5 years 11 months 15 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 10
Shares Exercisable (in shares) | shares	662,798
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 10
Time Vesting Options [Member] | Range One [Member]
Lower Range Limit (in dollars per share)	$ 4.01
Shares Outstanding (in shares) | shares	566,673
Upper Range Limit (in dollars per share)	$ 8
Outstanding, Weighted Average Remaining Contractual Term (Year)	6 years 7 months 17 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 7.42
Shares Exercisable (in shares) | shares	566,673
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 7.42
Time Vesting Options [Member] | Range Two [Member]
Lower Range Limit (in dollars per share)	$ 8.01
Shares Outstanding (in shares) | shares	96,125
Outstanding, Weighted Average Remaining Contractual Term (Year)	2 years 10 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 25.22
Shares Exercisable (in shares) | shares	96,125
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 25.22
Performance Vesting Options [Member]
Lower Range Limit (in dollars per share)	$ 4.01
Shares Outstanding (in shares) | shares	240,000
Upper Range Limit (in dollars per share)	$ 8
Outstanding, Weighted Average Remaining Contractual Term (Year)	6 years 5 months 1 day
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 7.59
Shares Exercisable (in shares) | shares	240,000
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 7.59
Market Vesting Options [Member] | Range One [Member]
Lower Range Limit (in dollars per share)	$ 0.01
Shares Outstanding (in shares) | shares	733,334
Upper Range Limit (in dollars per share)	$ 4
Outstanding, Weighted Average Remaining Contractual Term (Year)	1 year 1 month 17 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 3
Shares Exercisable (in shares) | shares	0
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 0

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

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.

+ References

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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+ References

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- Definition

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+ References

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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.

+ References

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- Definition

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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