CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
OPERATING ACTIVITIES:
Net income	$ 15,984	$ 15,633
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	7,696	7,305
Loss on disposal of property and equipment	5
Deferred rent and facility related liabilities	83	3,650
Right-of-use asset amortization	7,832
Deferred income taxes	117	(102)
Share-based compensation expenses	2,641	3,704
Accounts receivable allowances	(160)	233
Changes in operating assets and liabilities:
Accounts receivable	3,626	(8,939)
Unbilled services, net	(14,582)	(9,976)
Prepaid expenses and other current assets, and other assets	(5,735)	1,417
Forgivable loans	(18,942)	(14,716)
Incentive cash awards	3,628	2,367
Accounts payable, accrued expenses, and other liabilities	(16,274)	(8,970)
Lease liabilities	(5,826)
Net cash used in operating activities	(19,907)	(8,394)
INVESTING ACTIVITIES:
Purchases of property and equipment	(12,548)	(13,379)
Net cash used in investing activities	(12,548)	(13,379)
FINANCING ACTIVITIES:
Issuance of common stock, principally stock options exercises	2,006	1,387
Borrowings under revolving line of credit	54,000	30,161
Repayments under revolving line of credit	(18,000)	(24,599)
Tax withholding payments reimbursed by shares	(388)	(1,783)
Cash paid on dividend equivalents	(35)	(98)
Cash dividends paid to shareholders	(4,742)	(4,168)
Repurchases of common stock	(18,068)	(20,389)
Distribution to noncontrolling interest		(41)
Net cash provided by (used in) financing activities	14,773	(19,530)
Effect of foreign exchange rates on cash and cash equivalents	(513)	(869)
Net decrease in cash and cash equivalents	(18,195)	(42,172)
Cash and cash equivalents at beginning of period	38,028	54,035
Cash and cash equivalents at end of period	19,833	11,863
Noncash investing and financing activities:
Purchases of property and equipment not yet paid for	3,461	1,852
Purchases of property and equipment paid by a third party	126
Asset retirement obligations	427	217
Right-of-use assets obtained in exchange for lease obligations	37,298
Right-of-use assets related to the adoption of ASC 842	82,329
Lease liabilities related to the adoption of ASC 842	106,765
Supplemental cash flow information:
Cash paid for taxes	6,078	3,409
Cash paid for interest	$ 848	$ 380