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Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Operating activities:    
Net income $ 6,475 $ 4,186
Adjustments to reconcile net income to net cash used in operating activities, net of effect of acquired businesses:    
Depreciation and amortization 3,138 3,201
Loss on disposal of property and equipment 9  
Deferred rent (1,455) (1,193)
Deferred income taxes 871 309
Share-based compensation expenses 2,616 1,321
Excess tax benefits from share-based compensation   (5)
Accounts receivable allowances (1,411) (64)
Changes in operating assets and liabilities:    
Accounts receivable (5,087) 17,474
Unbilled services (3,534) (8,160)
Prepaid expenses and other assets 1,722 (26,488)
Accounts payable, accrued expenses, and other liabilities (18,514) (16,307)
Net cash used in operating activities (15,170) (25,726)
Investing activities:    
Consideration paid for acquisitions, net (1,537) (15,591)
Purchase of property and equipment (1,358) (1,971)
Collections on notes receivable 14 14
Net cash used in investing activities (2,881) (17,548)
Financing activities:    
Issuance of common stock, principally stock option exercises   207
Payments on notes payable (26)  
Borrowings under line of credit   17,320
Repayments under line of credit   (12,177)
Payments of debt issuance costs   (1,014)
Tax withholding payments reimbursed by restricted shares (143) (214)
Excess tax benefits from share-based compensation   5
Repurchase of common stock (5,355)  
Net cash provided by (used in) financing activities (5,524) 4,127
Effect of foreign exchange rates on cash and cash equivalents (62) 29
Net decrease in cash and cash equivalents (23,637) (39,118)
Cash and cash equivalents at beginning of period 51,251 55,451
Cash and cash equivalents at end of period 27,614 16,333
Noncash investing and financing activities:    
Issuance of common stock for acquired business 427  
Supplemental cash flow information:    
Cash paid for income taxes 8,600 1,287
Cash paid for interest $ 189 $ 137