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Note 9 - Share-based Compensation and Employee Benefit Plan (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended | 33 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Dec. 31, 2020
Labor and Related Expense | $ 4,330,000 | $ 2,843,000 | $ 11,439,000 | $ 7,506,000 |  |
Payments of Ordinary Dividends, Common Stock |  |  |  |  | $ 0 |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  |  | 50.00% |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |  |  | 6.00% |  |  |
Defined Contribution Plan, Cost | 64,000 | 46,000 | $ 205,000 | 157,000 |  |
Restricted Stock [Member] |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount | $ 184,000 |  | $ 184,000 |  | $ 184,000 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  | 2 years 10 months 13 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) | 2,832,121 |  | 2,832,121 |  | 2,832,121 |
Share-Based Payment Arrangement, Expense | $ 22,000 | 30,000 | $ 63,000 | 110,000 |  |
2012 Stock Plan [Member] | Share-Based Payment Arrangement, Employee [Member] |  |  |  |  |  |
Share-Based Payment Arrangement, Expense | 8,000 | 25,000 | 14,000 | 65,000 |  |
2012 Stock Plan [Member] | Share-Based Payment Arrangement, Nonemployee [Member] |  |  |  |  |  |
Share-Based Payment Arrangement, Expense | 14,000 | 5,000 | 39,000 | 45,000 |  |
Labor and Related Expense | $ 82,000 | $ 68,000 | $ 182,000 | $ 252,000 |  |
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 |  |  |

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- 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) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(4)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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