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Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Operating activities:    
Net income $ 3,308 $ 2,835
Adjustments to reconcile net income to net cash used in operating activities, net of effect of acquired businesses:    
Depreciation and amortization 1,597 1,511
Deferred rent (687) (526)
Deferred income taxes 47 53
Share-based compensation expenses 1,327 480
Excess tax benefits from share-based compensation 0 (5)
Accounts receivable allowances (722) 1,743
Changes in operating assets and liabilities, exclusive of acquisitions:    
Accounts receivable 2,910 8,358
Unbilled services (5,003) (3,943)
Prepaid expenses and other current assets, and other assets 123 (6,566)
Accounts payable, accrued expenses, and other liabilities (17,357) (11,842)
Net cash used in operating activities (14,457) (7,902)
Investing activities:    
Consideration relating to acquisitions, net (1,504) (15,731)
Purchase of property and equipment (447) (1,174)
Net cash used in investing activities (1,951) (16,905)
Financing activities:    
Issuance of common stock, principally stock option exercises 0 119
Payments on notes payable (16) 0
Tax withholding payment reimbursed by restricted shares (143) (194)
Excess tax benefits from share-based compensation 0 5
Repurchase of common stock (2,124) 0
Net cash used in financing activities (2,283) (70)
Effect of foreign exchange rates on cash and cash equivalents (68) 16
Net decrease in cash and cash equivalents (18,759) (24,861)
Cash and cash equivalents at beginning of period 51,251 55,451
Cash and cash equivalents at end of period 32,492 30,590
Noncash investing and financing activities:    
Issuance of common stock for acquired business 427 0
Supplemental cash flow information:    
Cash paid for income taxes 3,525 1,080
Cash paid for interest $ 96 $ 55