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Note 13 - Stock-based Compensation Plan (Tables) | 9 Months Ended
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Sep. 30, 2022
Notes Tables |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Cost of revenues |  | $ | 18 |  |  | $ | 10 |  |  | $ | 44 |  |  | $ | 17 |
Selling expense |  |  | 9 |  |  |  | 8 |  |  |  | 23 |  |  |  | 17 |
Engineering and product development expense |  |  | 6 |  |  |  | 17 |  |  |  | 43 |  |  |  | 43 |
General and administrative expense |  |  | 417 |  |  |  | 336 |  |  |  | 1,263 |  |  |  | 1,017 |
|  | $ | 450 |  |  | $ | 371 |  |  | $ | 1,373 |  |  | $ | 1,094 |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2022 |  |  | 2021 |
Risk-free interest rate |  |  | 2.05 | % |  |  | 1.03 | %
Dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Expected common stock market price volatility factor |  |  | .55 |  |  |  | .50 |
Weighted average expected life of stock options (years) |  |  | 6.25 |  |  |  | 6.25 |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Exercise Price |
Options outstanding, January 1, 2022 (59,195 exercisable) |  |  | 408,869 |  |  |  | 9.07 |
Granted |  |  | 202,540 |  |  |  | 8.45 |
Exercised |  |  | (8,060 | ) |  |  | 4.74 |
Canceled |  |  | (22,930 | ) |  |  | 9.10 |
Options outstanding, September 30, 2022 (167,886 exercisable) |  |  | 580,419 |  |  |  | 8.91 |
Nonvested Restricted Stock Shares Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Unvested shares outstanding, January 1, 2022 |  |  | 262,533 |  |  |  | 7.16 |
Granted |  |  | 123,533 |  |  |  | 9.21 |
Vested |  |  | (82,672 | ) |  |  | 7.85 |
Forfeited |  |  | (5,944 | ) |  |  | 9.16 |
Unvested shares outstanding, September 30, 2022 |  |  | 297,450 |  |  |  | 7.86 |

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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 https://asc.fasb.org/extlink&oid=128089324&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 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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