CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019
Cash flows from operating activities:
Net income (loss)	$ (13,139)	$ 1,223
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	9,985	5,712
Deferred income taxes, net	(3,726)	(167)
(Gain) loss on sale/disposal of equipment	(16)	(8)
Provision for doubtful accounts	968	202
Stock-based compensation	8,825	4,041
Accretion and fair value adjustments of contingent consideration	1,630	(627)
Changes in operating assets and liabilities, net of effects from business acquisitions:
Accounts receivable	13,535	15,998
Contract assets	35,862	(8,148)
Other receivables	897	(1,719)
Prepaid expenses and other current assets	1,140	877
Other assets	2,496	(615)
Accounts payable	1,070	(6,615)
Accrued liabilities	(31,987)	2,036
Contract liabilities	1,594	65
Right-of-use assets	97	240
Net cash provided by operating activities	29,231	12,495
Cash flows from investing activities:
Purchase of equipment and leasehold improvements	(2,946)	(3,619)
Proceeds from sale of equipment	17	44
Cash paid for acquisitions, net of cash acquired		(21,800)
Net cash used in investing activities	(2,929)	(25,375)
Cash flows from financing activities:
Payments on contingent consideration	(1,433)	(1,381)
Payments on notes payable	(163)	(929)
Payments on debt issuance costs		(577)
Borrowings under term loan facility and line of credit	24,000	100,000
Repayments under term loan facility and line of credit	(35,500)	(70,000)
Principal payments on finance leases	(296)	(300)
Proceeds from stock option exercise	591	523
Proceeds from sales of common stock under employee stock purchase plan	1,073	749
Shares used to pay taxes on stock grants	(2,867)	(2,862)
Restricted Stock Award and Units	1
Net cash (used in) provided by financing activities	(14,594)	25,223
Net increase (decrease) in cash and cash equivalents	11,708	12,343
Cash and cash equivalents at beginning of period	5,452	15,259
Cash and cash equivalents at end of period	17,160	27,602
Cash paid during the period for:
Interest	2,797	2,156
Income taxes	262	2,040
Supplemental disclosures of noncash investing and financing activities:
Equipment acquired under finance leases	$ 318	$ 413