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STOCK OPTIONS (Tables) | 12 Months Ended
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Dec. 31, 2023
STOCK OPTIONS |
Summary of stock option activity | A summary of Director, officer, and employee options granted and outstanding under the 2008 Stock Option Plan is presented below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ | ​ | 2023 | ​ | 2022 | ​ | 2021
​ |  | ​ |  | Weighted |  | ​ |  | Weighted |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Exercise | ​ | ​ | ​ | Exercise | ​ | ​ | ​ | Exercise
​ | ​ | Shares | ​ | Price | ​ | Shares | ​ | Price | ​ | Shares | ​ | Price
Outstanding at beginning of period |  | 147,150 | ​ | $ | 2.06 |  | 173,050 | ​ | $ | 2.06 |  | 199,450 | ​ | $ | 2.05
Granted |  | — | ​ | $ | — |  | — | ​ | $ | — |  | — | ​ | $ | —
Exercised |  | — | ​ | $ | — |  | (11,200) | ​ | $ | 1.23 |  | (25,400) | ​ | $ | 1.91
Forfeited |  | — | ​ | $ | — |  | (14,700) | ​ | $ | 2.75 |  | (1,000) | ​ | $ | 2.75
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at end of period |  | 147,150 | ​ | $ | 2.06 |  | 147,150 | ​ | $ | 2.06 |  | 173,050 | ​ | $ | 2.06
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at end of period |  | 147,150 | ​ | $ | 2.06 |  | 147,150 | ​ | $ | 2.06 |  | 173,050 | ​ | $ | 2.06
​
Summary of stock options by exercise price | The following table summarizes information about Director, officer, and employee options outstanding under the 2008 Stock Option Plan at December 31, 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average | ​ | ​
Exercise Prices |  | Shares Outstanding |  | Remaining Contractual Life |  | Shares Exercisable
$ | 1.05 |  | 60,000 |  | 2.99 |  | 60,000
$ | 2.75 |  | 87,150 |  | 2.69 |  | 87,150
​

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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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