CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Contract revenue	$ 69,007,000	$ 58,660,000	$ 209,191,000	$ 151,516,000
Direct costs of contract revenue (inclusive of directly related depreciation and amortization):
Salaries and wages	11,425,000	10,421,000	33,594,000	28,753,000
Subcontractor services and other direct costs	37,310,000	32,134,000	118,881,000	75,161,000
Total direct costs of contract revenue	48,735,000	42,555,000	152,475,000	103,914,000
General and administrative expenses:
Salaries and wages, payroll taxes and employee benefits	8,691,000	7,825,000	26,092,000	23,035,000
Facilities and facility related	1,235,000	1,039,000	3,478,000	2,978,000
Stock-based compensation	896,000	268,000	1,992,000	732,000
Depreciation and amortization	1,053,000	742,000	2,896,000	2,308,000
Other	4,214,000	3,178,000	11,548,000	9,694,000
Total general and administrative expenses	16,089,000	13,052,000	46,006,000	38,747,000
Income from operations	4,183,000	3,053,000	10,710,000	8,855,000
Other income (expense):
Interest expense	(23,000)	(43,000)	(88,000)	(137,000)
Other, net	18,000		56,000	2,000
Total other expense, net	(5,000)	(43,000)	(32,000)	(135,000)
Income before income taxes	4,178,000	3,010,000	10,678,000	8,720,000
Income tax expense	1,292,000	548,000	1,839,000	1,990,000
Net income	$ 2,886,000	$ 2,462,000	$ 8,839,000	$ 6,730,000
Earnings per share:
Basic (in dollars per share)	$ 0.33	$ 0.30	$ 1.03	$ 0.82
Diluted (in dollars per share)	$ 0.31	$ 0.28	$ 0.97	$ 0.79
Weighted-average shares outstanding:
Basic (in shares)	8,730,000	8,308,000	8,580,000	8,181,000
Diluted (in shares)	9,248,000	8,720,000	9,138,000	8,516,000