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Note 8 - Stock-based Compensation Expense (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | Restricted Stock Units |  |  | Grant Date Weighted- Average Fair Value |
Outstanding at January 1, 2021 |  |  | 13,000 |  |  | $ | 1.97 |
Granted |  |  | 165,000 |  |  | $ | 2.61 |
Vested |  |  | (168,000 | ) |  | $ | 2.57 |
Outstanding at December 31, 2021 |  |  | 10,000 |  |  | $ | 2.57 |
Granted |  |  | 131,000 |  |  | $ | 2.40 |
Vested |  |  | (132,000 | ) |  | $ | 2.40 |
Forfeited |  |  | (3,000 | ) |  | $ | 2.92 |
Outstanding at December 31, 2022 |  |  | 6,000 |  |  | $ | 2.33 |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
|  |  |  |  |  | Stock-Based |
|  | Awards Issued |  |  | Compensation |
|  | and Vested |  |  | Expense |
Options |  |  | — |  |  | $ | 10,000 |
Options Exercised |  |  | 3,000 |  |  |  | — |
Management Bonus Program - vested and issued |  |  | 11,000 |  |  |  | — |
Management Bonus Program |  |  | — |  |  |  | 92,000 |
Annual RSU Awards |  |  | 1,000 |  |  |  | 6,000 |
Board RSU Awards - other |  |  | — |  |  |  | 3,000 |
Executive Compensation |  |  | 120,000 |  |  |  | 288,000 |
|  |  | 135,000 |  |  | $ | 399,000 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
Options |  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value |
Balance at December 31, 2020 |  |  | 417,000 |  |  | $ | 2.79 |  |  |  | 1.61 |  |  | $ | 2,000 |
Granted |  |  | 6,000 |  |  | $ | 2.92 |  |  |  | 7.00 |  |  | $ | — |
Exercised |  |  | (22,000 | ) |  | $ | 2.65 |  |  |  | — |  |  | $ | — |
Forfeited |  |  | (334,000 | ) |  | $ | 2.81 |  |  |  | — |  |  | $ | — |
Balance at December 31, 2021 |  |  | 67,000 |  |  | $ | 2.72 |  |  |  | 3.33 |  |  | $ | — |
Granted |  |  | 50,000 |  |  | $ | 2.72 |  |  |  | 7.00 |  |  | $ | — |
Exercised |  |  | (4,000 | ) |  | $ | 2.29 |  |  |  | — |  |  | $ | — |
Forfeited |  |  | (18,000 | ) |  | $ | 2.64 |  |  |  | — |  |  | $ | — |
Balance at December 31, 2022 |  |  | 95,000 |  |  | $ | 2.76 |  |  |  | 4.83 |  |  | $ | 25,000 |
Exercisable at December 31, 2021 |  |  | 58,000 |  |  | $ | 2.72 |  |  |  | 2.96 |  |  | $ | — |
Exercisable at December 31, 2022 |  |  | 38,000 |  |  | $ | 2.79 |  |  |  | 2.38 |  |  | $ | — |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2022 |  |  | 2021 |
Expected life (years) |  |  | 7.0 |  |  |  | 7.0 |
Expected forfeiture rate |  |  | 0.0 | % |  |  | 0.0 | %
Expected volatility |  |  | 50 | % |  |  | 40 | %
Dividend yield |  |  | 0 | % |  |  | 0 | %
Risk-free interest rate |  |  | 3.3 | % |  |  | 1.2 | %
The following summarizes the assumption inputs used for the Company’s Black-Scholes calculation: Expected life (years): The expected term represents the weighted average period that the Company’s stock options are expected to be outstanding.

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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