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Note 12 - Leases (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Lease, Weighted Average Remaining Lease Term (Year)	3 years 11 months 15 days
Operating Lease, Weighted Average Discount Rate, Percent	5.87%
Operating Lease, Payments	$ 100	$ 300
General and Administrative Expense [Member]
Operating Lease, Cost	100	200
Variable Lease, Cost	100	100
Short-Term Lease, Cost	$ 100	$ 0

X

- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 4
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-Publisher FASB
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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

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-Topic 842
-SubTopic 20
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X

- Definition

Weighted average discount rate for operating lease calculated at point in time.

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-Section 55
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-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

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X

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
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-Section 55
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-URI https://asc.fasb.org//1943274/2147479589/842-20-55-53

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X

- Definition

Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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X

- Definition

Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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