UNAUDITED CONSOLIDATED STATEMENTS OF INCOME - USD ($)	3 Months Ended
	Apr. 01, 2018	Mar. 26, 2017
Income Statement [Abstract]
Revenues	$ 66,855,470	$ 56,843,687
Cost of services	49,545,539	43,172,453
Gross profit	17,309,931	13,671,234
Selling, general and administrative expenses	11,979,120	9,606,444
Depreciation and amortization	1,295,506	1,371,434
Operating income	4,035,305	2,693,356
Interest expense, net	(871,092)	(558,619)
Income (loss) before income taxes	3,164,213	2,134,737
Income tax expense	698,642	832,906
Net income (loss)	$ 2,465,571	$ 1,301,831
Net income per share:
Basic (in dollars per share)	$ 0.28	$ 0.15
Diluted (in dollars per share)	$ 0.27	$ 0.15
Weighted-average shares outstanding:
Basic (shares)	8,761,292	8,668,955
Diluted (shares)	9,087,016	8,924,419