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Stockholders' Equity - Schedule of Changes in Stockholders Equity (Detail) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Beginning balance $ 284,471,958 $ 275,034,091
Change in accounting principle   (935,916)
Issuance of common stock   1,172,625
Stock-based compensation 266,439 584,574
Purchase of treasury stock (15,875) (19,826)
Net income (loss) (8,946,163) 1,353,263
Cash dividends (1,398,321) (1,387,832)
Ending balance $ 274,378,038 $ 275,800,979