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Note 8 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | For the Year Ended December 31, |
|  | 2021 |  |  | 2020 |
Stock options and restricted stock units, net of forfeited |  | $ | 82 |  |  | $ | 290 |
After-tax effect of stock based compensation |  | $ | 82 |  |  | $ | 290 |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | 2021 |  |  | 2020 |
|  | Number of Options |  |  | Weighted-Average Exercise Price |  |  | Number of Options |  |  | Weighted-Average Exercise Price |
Outstanding at beginning of year |  |  | 484,500 |  |  | $ | 3.57 |  |  |  | 747,500 |  |  | $ | 3.33 |
Granted |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | (183,000 | ) |  |  | 1.61 |
Expired or forfeited |  |  | (50,000 | ) |  |  | 8.16 |  |  |  | (80,000 | ) |  |  | 5.79 |
Outstanding at end of year |  |  | 434,500 |  |  | $ | 3.05 |  |  |  | 484,500 |  |  | $ | 3.57 |
Exercisable at end of year |  |  | 434,500 |  |  | $ | 3.05 |  |  |  | 484,500 |  |  | $ | 3.57 |
Weighted-Average Remaining Contractual Life (years) |  |  |  |  |  |  | 3.08 |  |  |  |  |  |  |  | 3.70 |
Aggregate Intrinsic Value |  |  |  |  |  | $ | 38 |  |  |  |  |  |  | $ | 488 |
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block] |
Options Outstanding and Exercisable |
Range of Exercise Prices |  | Number of Options |  |  | Weighted-Average Remaining Contractual Life (years) |  |  | Weighted-Average Exercise Price |
$0.96 - $1.27 |  |  | 88,000 |  |  |  | 5.9 |  |  | $ | 0.97 |
$1.28 - $3.00 |  |  | 132,000 |  |  |  | 3.6 |  |  |  | 2.26 |
$3.01 - $4.54 |  |  | 120,000 |  |  |  | 1.0 |  |  |  | 3.72 |
$4.55 - $5.22 |  |  | 94,500 |  |  |  | 2.4 |  |  |  | 5.22 |
|  |  | 434,500 |  |  |  | 3.1 |  |  | $ | 3.05 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Unvested restricted stock units at December 31, 2019 |  |  | 775,635 |  |  | $ | 1.47 |
Forfeited |  |  | (70,000 | ) |  |  | 1.03 |
Vested |  |  | (605,630 | ) |  |  | 1.09 |
Unvested restricted stock units at December 31, 2020 |  |  | 100,005 |  |  |  | 1.50 |
Forfeited |  |  | (5,000 | ) |  |  | 0.97 |
Vested |  |  | (50,002 | ) |  |  | 1.50 |
Unvested restricted stock units at December 31, 2021 |  |  | 45,003 |  |  | $ | 1.51 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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