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QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2019
QUARTERLY FINANCIAL DATA (UNAUDITED) |
Schedule of QUARTERLY FINANCIAL DATA (UNAUDITED) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2017
​ | ​ | Three Months Ended
​ |  | March 31 |  | June 30 |  | September 30 |  | December 31
Revenues |  | $ | 12,243,793 | ​ | $ | 14,503,309 | ​ | $ | 16,643,930 | ​ | $ | 23,308,668
Operating Income | ​ | ​ | 2,502,852 | ​ |  | 2,621,612 | ​ |  | 4,292,081 | ​ |  | 6,550,596
Net Income (Loss) | ​ | ​ | 1,279,281 | ​ |  | 1,910,763 | ​ |  | 3,073,760 | ​ |  | (4,509,935)
Basic Net Income (Loss) Per Share |  | $ | 0.03 | ​ | $ | 0.04 | ​ | $ | 0.06 | ​ | $ | (0.08)
Diluted Net Income (Loss) Per Share | ​ | ​ | 0.03 | ​ |  | 0.04 | ​ |  | 0.06 | ​ |  | (0.08)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2018
​ | ​ | Three Months Ended
​ |  | March 31 |  | June 30 |  | September 30 |  | December 31
Revenues | ​ | $ | 29,891,391 | ​ | $ | 29,924,883 | ​ | $ | 32,687,179 | ​ | $ | 27,561,908
Operating Income (Loss) | ​ |  | 10,935,120 | ​ |  | 9,397,559 | ​ |  | 9,615,030 | ​ |  | (9,986,770)
Net Income (Loss) | ​ |  | 5,665,634 | ​ |  | 4,719,806 | ​ |  | 5,693,628 | ​ |  | (7,079,308)
Basic Net Income (Loss) Per Share | ​ | $ | 0.10 | ​ | $ | 0.08 | ​ | $ | 0.09 | ​ | $ | (0.12)
Diluted Net Income (Loss) Per Share | ​ |  | 0.10 | ​ |  | 0.08 | ​ |  | 0.09 | ​ | $ | (0.12)

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118952077&loc=d3e1280-108306 + Details
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