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CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)	Total	Common Stock	Treasury Stock	Additional paid-in capital	Accumulated deficit
Beginning balance at Dec. 31, 2017	$ 49,975,264	$ 38,937	$ (16,625,873)	$ 93,913,557	$ (27,351,357)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	269,596			269,596
Net loss	(2,043,292)				(2,043,292)
Ending balance at Mar. 31, 2018	47,826,748	38,937	(17,000,693)	94,183,153	(29,394,649)
Beginning balance at Dec. 31, 2017	49,975,264	38,937	(16,625,873)	93,913,557	(27,351,357)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,179,424)
Ending balance at Sep. 30, 2018	42,909,938	38,967	(18,929,915)	94,331,667	(32,530,781)
Beginning balance at Mar. 31, 2018	47,826,748	38,937	(17,000,693)	94,183,153	(29,394,649)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	73,425			73,425
Net loss	(1,596,637)				(1,596,637)
Ending balance at Jun. 30, 2018	46,303,536	38,937	(17,000,693)	94,256,578	(30,991,286)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	70,619			70,619
Net loss	(1,539,495)				(1,539,495)
Ending balance at Sep. 30, 2018	$ 42,909,938	$ 38,967	$ (18,929,915)	94,331,667	(32,530,781)
Beginning balance (in shares) at Dec. 31, 2018	38,966,988	38,966,988	(12,253,502)
Beginning balance at Dec. 31, 2018	$ 42,451,169	$ 38,967	$ (18,929,915)	94,385,230	(33,043,113)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	309,563			309,563
Net loss	(2,175,258)				(2,175,258)
Ending balance at Mar. 31, 2019	$ 40,585,474	$ 38,967	$ (18,929,915)	94,694,793	(35,218,371)
Beginning balance (in shares) at Dec. 31, 2018	38,966,988	38,966,988	(12,253,502)
Beginning balance at Dec. 31, 2018	$ 42,451,169	$ 38,967	$ (18,929,915)	94,385,230	(33,043,113)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	$ 1,034,346			1,034,346
Exercise of stock options (in shares)	635,500	499,671
Exercise of stock options	$ 328,590	$ 500		328,090
Net loss	$ (6,569,434)				(6,569,434)
Ending balance (in shares) at Sep. 30, 2019	39,466,659	39,466,659	(12,253,502)
Ending balance at Sep. 30, 2019	$ 37,244,671	$ 39,467	$ (18,929,915)	95,747,666	(39,612,547)
Beginning balance at Mar. 31, 2019	40,585,474	38,967	(18,929,915)	94,694,793	(35,218,371)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	580,603			580,603
Net loss	(2,695,792)				(2,695,792)
Ending balance at Jun. 30, 2019	38,619,465	$ 39,365	$ (18,929,915)	95,424,178	(37,914,163)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	144,180			144,180
Net loss	$ (1,698,384)				(1,698,384)
Ending balance (in shares) at Sep. 30, 2019	39,466,659	39,466,659	(12,253,502)
Ending balance at Sep. 30, 2019	$ 37,244,671	$ 39,467	$ (18,929,915)	$ 95,747,666	$ (39,612,547)

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