Consolidated Statement of Stockholders' Equity - USD ($)	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Beginning Balance, Shares at Jan. 03, 2015	35,090,352
Beginning Balance, Amount at Jan. 03, 2015	$ 35,090	$ 43,487,623	$ (39,524,322)	$ 3,998,391
Issuance of common stock, net of offering costs, Shares	533,334
Issuance of common stock, net of offering costs, Amount	$ 534	1,974,359		$ 1,974,893
Exercise of stock options, Shares	40,236			0
Exercise of stock options, Amount	$ 40	94,806		$ 94,846
Vested restricted stock, Shares	228,000
Vested restricted stock, Amount	$ 228	(228)		0
Share-based compensation, Shares	111,667
Share-based compensation, Amount	$ 112	1,977,499		1,977,611
Net loss			(2,771,067)	(2,771,067)
Ending Balance, Shares at Jan. 02, 2016	36,003,589
Ending Balance, Amount at Jan. 02, 2016	$ 36,004	47,534,059	(42,295,389)	5,274,674
1 for 3 reverse stock split, isssuance due to fractional shares round up, Shares	1,632
1 for 3 reverse stock split, isssuance due to fractional shares round up, Amount	$ 2	(2)		0
Issuance of common stock, net of offering costs, Shares	1,245,227
Issuance of common stock, net of offering costs, Amount	$ 1,245	5,716,230		5,717,475
Exercise of stock options, Shares	280,086
Exercise of stock options, Amount	$ 280	716,332		716,612
Vested restricted stock, Shares	13,997
Vested restricted stock, Amount	$ 14	(14)		0
Share-based compensation, Amount		1,193,782		1,193,782
Net loss			(2,928,185)	(2,928,185)
Ending Balance, Shares at Dec. 31, 2016	37,544,531
Ending Balance, Amount at Dec. 31, 2016	$ 37,545	55,160,387	(45,223,574)	9,974,358
Issuance of common stock, net of offering costs, Shares	15,592,788
Issuance of common stock, net of offering costs, Amount	$ 15,593	47,578,626		47,594,219
Exercise of stock options, Shares	884,754
Exercise of stock options, Amount	$ 885	3,037,075		3,037,960
Vested restricted stock, Shares	674,668
Vested restricted stock, Amount	$ 674	(674)		0
Share-based compensation, Amount		4,604,749		4,604,749
Net loss			(11,377,618)	(11,377,618)
Ending Balance, Shares at Dec. 30, 2017	54,696,741
Ending Balance, Amount at Dec. 30, 2017	$ 54,697	$ 110,380,163	$ (56,601,192)	$ 53,833,668