Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015
Operating activities:
Net income	$ 12,157	$ 8,914
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	5,848	4,782
Loss on disposal of property and equipment	3	16
GNU gain on sale of business assets	(3,836)
Deferred rent	3,250	4,976
Deferred income taxes	886	(339)
Share-based compensation expenses	4,791	4,403
Excess tax benefits from share-based compensation	(55)	(87)
GNU gain on extinguishment of debt		(606)
Accounts receivable allowances	(247)	562
Changes in operating assets and liabilities:
Accounts receivable	(3,627)	(3,153)
Unbilled services	(11,874)	(8,612)
Prepaid expenses and other current assets, and other assets	1,588	(2,379)
Forgivable loans	7,743	1,609
Accounts payable, accrued expenses, and other liabilities	(414)	(14,950)
Net cash provided by (used in) operating activities	16,213	(4,864)
Investing activities:
Purchases of property and equipment	(11,808)	(12,696)
GNU cash proceeds from sale of business assets	1,100
Collections on notes receivable		1,554
Payments on notes receivable		(77)
Net cash used in investing activities	(10,708)	(11,219)
Financing activities:
Issuance of common stock, principally stock option exercises	1,448	602
Payments on notes payable	(75)	(300)
Borrowings under line of credit	7,500	4,000
Repayments under line of credit	(7,500)	(4,000)
Tax withholding payments reimbursed by restricted shares	(490)	(127)
Excess tax benefits from share-based compensation	55	87
Repurchases of common stock	(19,318)	(10,810)
Net cash used in financing activities	(18,380)	(10,548)
Effect of foreign exchange rates on cash and cash equivalents	(80)	(565)
Net decrease in cash and cash equivalents	(12,955)	(27,196)
Cash and cash equivalents at beginning of period	38,139	48,199
Cash and cash equivalents at end of period	25,184	21,003
Noncash investing and financing activities:
Issuance of common stock for acquired business	44	42
Purchases of property and equipment not yet paid for	1,234	3,858
Purchases of property and equipment by a third party		1,343
Asset retirement obligations	1,479
Supplemental cash flow information:
Cash paid for income taxes	3,959	8,227
Cash paid for interest	$ 327	$ 240