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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jul. 01, 2016
Jul. 03, 2015
Cash flows from operating activities:    
Net income $ 9,828 $ 6,696
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation expense 1,258 1,275
Amortization expense 550 1,094
Amortization of debt issuance costs 61 49
Non-cash stock compensation expense 4,224 3,572
(Reversal) provision for doubtful accounts (57) 123
(Gain) loss on foreign currency translation (585) 416
Increase in deferred tax liability 3,148 3,409
Changes in assets and liabilities, net of effects from acquisitions:    
Increase in accounts receivable and unbilled revenue (4,920) (7,684)
Increase in prepaid expenses and other assets (424) (244)
Decrease in accounts payable (2,010) (2,742)
Decrease (increase) in accrued expenses and other liabilities (3,374) 968
Decrease (increase) in income tax payable 80 (256)
Net cash provided by operating activities 7,779 6,676
Cash flows from investing activities:    
Purchases of property and equipment (1,259) (1,593)
Net cash used in investing activities (1,259) (1,593)
Cash flows from financing activities:    
Proceeds from the issuance of common stock 519 373
Proceeds from borrowings 30,000 2,500
Repayment of borrowings (8,000) (2,500)
Debt issuance costs (237)  
Dividends paid (3,199)  
Repurchases of common stock (33,476) (3,533)
Net cash used in financing activities (14,393) (3,160)
Effect of exchange rate on cash (12) (314)
Net (decrease) increase in cash and cash equivalents (7,885) 1,609
Cash and cash equivalents at beginning of period 23,503 14,608
Cash and cash equivalents at end of period 15,618 16,217
Supplemental disclosure of cash flow information:    
Cash paid for income taxes 2,546 208
Cash paid for interest $ 65 $ 203