Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2016	6,346,590
Balance at Dec. 31, 2016	$ 63,466	$ 24,131,474	$ 10,118,322	$ 34,313,262
Exercise of stock options (in shares)	36,800			34,000
Exercise of stock options	$ 368	145,852		$ 146,220
Stock-based compensation (in shares)	75,324
Stock-based compensation	$ 753	931,990		932,743
Net (loss) income			5,261,411	$ 5,261,411
Balance (in shares) at Dec. 31, 2017	6,458,714			6,458,714
Balance at Dec. 31, 2017	$ 64,587	25,209,316	15,379,733	$ 40,653,636
Exercise of stock options (in shares)				0
Exercise of stock options
Stock-based compensation (in shares)	77,174
Stock-based compensation	$ 771	938,940		939,711
Net (loss) income			(5,201,021)	$ (5,201,021)
Balance (in shares) at Dec. 31, 2018	6,535,888			6,535,888
Balance at Dec. 31, 2018	$ 65,358	$ 26,148,256	$ 10,178,712	$ 36,392,326

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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