Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Revenue:
Total revenue	$ 75,928	$ 73,197	$ 151,592	$ 136,683
Cost of service:
Total cost of service	45,861	43,427	93,750	84,673
Selling, general and administrative costs (includes $1,235 and $2,168 and $874 and $1,614 of stock compensation expense in the three and six months ended July 1, 2022 and July 2, 2021, respectively)	15,886	15,553	30,252	28,940
Total costs and operating expenses	61,747	58,980	124,002	113,613
Income from operations	14,181	14,217	27,590	23,070
Other expense:
Interest expense	(28)	(25)	(56)	(50)
Income from operations before income taxes	14,153	14,192	27,534	23,020
Income tax expense	3,938	3,660	6,814	6,120
Income from continuing operations	10,215	10,532	20,720	16,900
Loss from discontinued operations				(7)
Net income	$ 10,215	$ 10,532	$ 20,720	$ 16,893
Basic net income per common share:
Income per common share from continuing operations	$ 0.32	$ 0.35	$ 0.66	$ 0.56
Loss per common share from discontinued operations				(0.00)
Net income per common share	0.32	0.35	0.66	0.56
Diluted net income per common share:
Income per common share from continuing operations	0.32	0.32	0.65	0.51
Loss per common share from discontinued operations				(0.00)
Net income per common share	$ 0.32	$ 0.32	$ 0.65	$ 0.51
Weighted average common shares outstanding:
Basic	31,652,413	30,093,726	31,550,911	30,150,608
Diluted	32,221,038	32,969,944	32,032,300	32,869,555
Revenue Before Reimbursements [Member]
Revenue:
Total revenue	$ 74,768	$ 72,997	$ 149,876	$ 136,407
Reimbursements [Member]
Revenue:
Total revenue	1,160	200	1,716	276
Cost of service:
Total cost of service	1,160	200	1,716	276
Cost Before Reimbursements [Member]
Cost of service:
Total cost of service	$ 44,701	$ 43,227	$ 92,034	$ 84,397