UNAUDITED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 6 months ended Jul. 01, 2018 - USD ($)	Total	Preferred Stock	Common Stock	Additional Paid in Capital	Retained Earnings	Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range	Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range Additional Paid in Capital
Stockholders’ equity, December 31, 2017 at Dec. 31, 2017	$ 39,134,679	$ 0	$ 87,594	$ 37,675,329	$ 1,371,756
Stockholders’ equity, December 31, 2017 (in shares) at Dec. 31, 2017			8,759,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	114,836			114,836
Issuance costs of the 2013 Plan and Form S-3, shares			1,293,750
Issuance of shares, net of offering costs	21,386,013		$ 12,938	21,373,075		$ (7,500)	$ (7,500)
Exercise of common stock options and warrants (in shares)			35,903
Exercise of common stock options and warrants	11,069		$ 358	10,711
L. Allen Baker, Jr. cancellation agreement	(3,335,169)			(3,335,169)
Cash dividend declared	(4,828,076)				(4,828,076)
Net income (loss)	7,635,455				7,635,455
Stockholders’ equity, July 1, 2018 at Jul. 01, 2018	$ 60,111,307	$ 0	$ 100,890	$ 55,831,282	$ 4,179,135
Stockholders’ equity, April 01, 2018 (in shares) at Jul. 01, 2018			10,089,029