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Note 5 - Leases - Lease Cost and Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Operating lease cost	$ 103,000	$ 101,000	$ 206,000	$ 202,000
Sublease income	(49,000)	(43,000)	(99,000)	(86,000)
Total lease cost	54,000	58,000	107,000	116,000
Cash paid for amounts included in the measurement of lease liabilities - Operating leases	$ 103,000	$ 101,000	$ 206,000	$ 202,000
Weighted-average remaining lease term - Operating leases in years (Year)	11 months 1 day	1 year 6 months 7 days	11 months 1 day	1 year 6 months 7 days
Weighted-average discount rate - Operating leases	5.28%	5.75%	5.28%	5.75%

X

- Definition

Amount of lease cost recognized by lessee for lease contract.

+ References

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-Name Accounting Standards Codification
-Section 55
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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

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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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X

- Definition

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

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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.

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X

- Definition

Amount of sublease income excluding finance and operating lease expense.

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