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Note 2 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Property, Plant, and Equipment, Useful Lives [Table Text Block] |
Buildings (in years) |  | 25 |
Machinery and equipment (in years) | 5 | - | 15
Office furniture and equipment (in years) | 2 | - | 7
Leasehold improvements (in years) | 4 | - | 5
Software (in years) |  | 5 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Years Ended December 31, |
|  | 2021 |  |  | 2020 |
Net income (numerator) |  | $ | 6,756,000 |  |  | $ | 26,888,000 |
Shares (denominator): |  |  |  |  |  |  |  |
Basic weighted average common shares outstanding |  |  | 13,225,628 |  |  |  | 13,449,987 |
Add: Dilutive effect of common stock options |  |  | 273,814 |  |  |  | 522,158 |
Diluted weighted average common shares outstanding |  |  | 13,499,442 |  |  |  | 13,972,145 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.51 |  |  | $ | 2.00 |
Diluted |  | $ | 0.50 |  |  | $ | 1.92 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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