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Note 10 - Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  | Weighted |
|  |  |  |  |  | Average |
|  |  |  |  |  | Exercise Price |
|  | Shares |  |  | Per Option |
Options outstanding, December 31, 2017 |  |  | 884,998 |  |  | $ | 2.26 |
Granted to employees and directors |  |  | 349,750 |  |  |  | 3.27 |
Exercised |  |  | (211,835 | ) |  |  | 1.86 |
Canceled/expired/forfeited |  |  | - |  |  |  | - |
Options outstanding, December 31, 2018 |  |  | 1,022,913 |  |  |  | 2.69 |
Granted to employees and directors |  |  | 370,000 |  |  |  | 3.59 |
Exercised |  |  | (66,499 | ) |  |  | 1.96 |
Canceled/expired/forfeited |  |  | - |  |  |  | - |
Options outstanding, December 31, 2019 |  |  | 1,326,414 |  |  |  | 2.97 |
Options exercisable, December 31, 2019 |  |  | 694,914 |  |  |  | 2.51 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Stock Options |
|  | For the Years Ended December 31, |
|  | 2019 |  |  | 2018 |
Exercise price |  | $ | 3.59 |  |  | $ | 3.27 |
Risk-free interest rate |  |  | 2.23 | % |  |  | 2.73 | %
Expected volatility |  |  | 32.17 | % |  |  | 57.75 | %
Expected life in years |  |  | 4.25 |  |  |  | 4.25 |
Dividend rate |  |  | - |  |  |  | - |
Black-Scholes fair value |  | $ | 1.06 |  |  | $ | 1.57 |
Share-based Payment Arrangement, Activity [Table Text Block] |
|  |  |  |  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  |  | Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contract Life (in years) |  |  | Aggregate Intrinsic Value |  |  | Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contract Life (in years) |  |  | Aggregate Intrinsic Value |
$1.58 | - | $3.90 |  |  |  | 1,326,414 |  |  | $ | 2.97 |  |  |  | 2.84 |  |  | $ | 604,000 |  |  |  | 694,914 |  |  | $ | 2.51 |  |  |  | 2.16 |  |  | $ | 636,000 |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, 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 (e) -URI http://asc.fasb.org/extlink&oid=116856206&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 (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&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 (d) -URI http://asc.fasb.org/extlink&oid=116856206&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=116856206&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=116856206&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=116856206&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 http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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