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Note 9 - Share-based Compensation and Employee Benefit Plan (Details Textual) - USD ($)	3 Months Ended		27 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2020
Labor and Related Expense	$ 3,346,000	$ 2,216,000
Payments of Ordinary Dividends, Common Stock			$ 0
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Cost	$ 74,000	48,000
Maximum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	9.00%
Restricted Stock [Member]
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount	$ 184,000		$ 184,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	3 years 1 month 20 days
2012 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)				3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	2,834,617		2,834,617
Share-Based Payment Arrangement, Expense	$ 21,000	34,000
2012 Stock Plan [Member] | Share-Based Payment Arrangement, Employee [Member]
Share-Based Payment Arrangement, Expense	8,000	15,000
2012 Stock Plan [Member] | Share-Based Payment Arrangement, Nonemployee [Member]
Share-Based Payment Arrangement, Expense	13,000	19,000
Labor and Related Expense	$ 63,000	$ 94,000
2012 Stock Plan [Member] | Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	4 years
2012 Stock Plan [Member] | Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	5 years
2012 Stock Plan [Member] | Restricted Stock [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	3 years

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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