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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Operating activities:    
Net income $ 6,737 $ 9,006
Adjustments to reconcile net income to net cash used in operating activities:    
Depreciation and amortization 4,199 3,964
Impairment of intangible assets 510  
GNU gain on sale of business assets (250) (3,836)
Deferred rent 1,202 3,154
Deferred income taxes 213 731
Share-based compensation expenses 3,052 3,105
Excess tax benefits from share-based compensation   (55)
Accounts receivable allowances 2,620 (425)
Changes in operating assets and liabilities:    
Accounts receivable (6,344) (3,855)
Unbilled services (13,149) (5,138)
Prepaid expenses and other current assets, and other assets 5,380 542
Forgivable loans 4,612 3,613
Incentive cash awards 609  
Accounts payable, accrued expenses, and other liabilities (17,874) (15,881)
Net cash used in operating activities (8,483) (5,075)
Investing activities:    
Cash consideration paid for acquisitions (16,163)  
Purchases of property and equipment (2,650) (6,750)
GNU cash proceeds from sale of business assets 250 1,100
Net cash used in investing activities (18,563) (5,650)
Financing activities:    
Issuance of common stock, principally stock option exercises 2,699  
Payments on notes payable   (75)
Borrowings under line of credit 11,500 5,000
Repayments under line of credit (11,500) (5,000)
Tax withholding payments reimbursed by restricted shares (703) (490)
Excess tax benefits from share-based compensation   55
Cash paid on dividend equivalents (25)  
Cash dividends paid to stockholders (2,377)  
Repurchases of common stock (12,417) (15,140)
Net cash used in financing activities (12,823) (15,650)
Effect of foreign exchange rates on cash and cash equivalents 1,007 441
Net decrease in cash and cash equivalents (38,862) (25,934)
Cash and cash equivalents at beginning of period 53,530 38,139
Cash and cash equivalents at end of period 14,668 12,205
Noncash investing and financing activities:    
Issuance of common stock for acquired business 3,044 44
Repurchases of common stock payable 1,046 1,315
Purchases of property and equipment not yet paid for 841 3,338
Purchases of property and equipment paid for by a third party 450  
Asset retirement obligations   1,522
Supplemental cash flow information:    
Cash paid for income taxes 5,229 1,592
Cash paid for interest $ 170 $ 246