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Organization and Significant Accounting Policies - Basic and Diluted Net Income per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic and Diluted Net Income Per Share
Net income	$ 9,630,959	$ 6,303,450	$ 499,764
Weighted-average shares outstanding - Basic (in shares)	11,282,214	10,758,752	10,638,858
Effect of dilutive securities:
Underwriters' warrants	55,361	92,486
Stock options	843,957	1,137,270	1,067,072
Restricted stock units	94,912	121,609	14,386
Weighted-average shares outstanding - Diluted (in shares)	12,276,444	12,110,117	11,720,316
Basic net income per share (in dollars per share)	$ 0.85	$ 0.59	$ 0.05
Diluted net income per share (in dollars per share)	$ 0.78	$ 0.52	$ 0.04
Anti-dilutive stock
Anti-dilutive stock options, warrants and restricted stock units	25,439	21,488	478,882

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