Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Cash Flows From Operating Activities:
Net income	$ 4,188	$ 5,543
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,040	6,113
Non-cash lease expense	1,704	2,009
Provision for doubtful accounts	215	206
Stock based compensation	3,379	1,798
Change in fair value of contingent consideration	0	49
(Gain) loss on disposals of property and equipment	(339)	1
Deferred income taxes	(1,614)	(463)
Amortization of debt issuance costs	220	0
Changes in operating assets and liabilities, net of impact of acquisitions:
Billed receivables	6,053	8,995
Unbilled receivables	(7,764)	3,350
Prepaid expenses and other assets	1,962	(1,331)
Accounts payable	44	(3,240)
Accrued liabilities	(8,061)	(4,930)
Income taxes payable	1,365	1,521
Billings in excess of costs and estimated earnings on uncompleted contracts	1,204	(3,370)
Deposits	7	62
Net cash provided by operating activities	13,603	16,313
Cash Flows From Investing Activities:
Cash paid for acquisitions (net of cash received from acquisitions)	0	(8,000)
Proceeds from sale of assets	425	0
Purchase of property and equipment	(4,525)	(690)
Net cash used in investing activities	(4,100)	(8,690)
Cash Flows From Financing Activities:
Payments on notes payable	(2,116)	(1,848)
Payments of contingent consideration	(650)	(700)
Payments of debt issuance costs	(236)	0
Net cash used in financing activities	(3,002)	(2,548)
Net increase in Cash and Cash Equivalents	6,501	5,075
Cash and cash equivalents – beginning of period	31,825	40,739
Cash and cash equivalents – end of period	38,326	45,814
Non-cash investing and financing activities:
Notes payable and other obligations issued for acquisitions	0	4,500
Stock issuance for acquisitions	558	563
Finance leases	408	0
Payment of contingent consideration and other obligations with common stock	$ 278	$ 725