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Note 13 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
2021 |  | $ | 342,000 |
2022 |  | $ | 375,000 |
2023 |  | $ | 310,000 |
2024 |  | $ | 297,000 |
2025 |  | $ | 354,000 |
2026 |  | $ | 288,000 |
2027 |  | $ | 111,000 |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Shares Under Option |  |  | Weighted- Average Exercise Price |
Outstanding—January 1, 2018: |  |  | 45,068 |  |  | $ | 10.79 |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | (45,005 | ) |  |  | 10.79 |
Canceled |  |  | (63 | ) |  |  | 11.22 |
Outstanding—December 31, 2018: |  |  | - |  |  | $ | - |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |
Canceled |  |  | - |  |  |  | - |
Outstanding—December 31, 2019: |  |  | - |  |  | $ | - |
Granted |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | - |
Canceled |  |  | - |  |  |  | - |
Outstanding—December 31, 2020: |  |  | - |  |  | $ | - |
Options exercisable—December 31, 2020: |  |  | - |  |  | $ | - |
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | Restricted Stock |
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value |
Nonvested—January 1, 2020 |  |  | 55,459 |  |  | $ | 24.35 |
Granted |  |  | 63,182 |  |  |  | 36.46 |
Canceled/forfeited/expired |  |  | (18,047 | ) |  |  | 38.25 |
Vested |  |  | (39,559 | ) |  |  | 19.18 |
Nonvested—December 31, 2020: |  |  | 61,035 |  |  | $ | 36.12 |

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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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