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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Cash flows from operating activities:    
Net income $ 1,759 $ 1,974
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 1,229 1,177
Change in contingent consideration 781
Share-based compensation expense 591 614
Provision for losses on accounts receivable 131 (128)
Deferred income tax expense 294 312
Changes in assets and liabilities:    
Accounts receivable 3,682 8,600
Prepaid expenses and other current assets 230 1,847
Net of transit accounts receivable and payable (1,189) 864
Accounts payable and accrued expenses (1,313) (1,746)
Accrued payroll and related costs (185) (2,334)
Income taxes payable 946 948
Total adjustments 5,197 10,154
Net cash provided by operating activities 6,956 12,128
Cash flows from investing activities:    
Property and equipment acquired (747) (732)
Decrease in deposits 4 3
Net cash used in investing activities (743) (729)
Cash flows from financing activities:    
Borrowings under line of credit 60,411 59,187
Repayments under line of credit (65,271) (69,036)
Issuance of stock for employee stock purchase plan 394 368
Common stock repurchases (365) (1,828)
Contingent consideration paid (790) (788)
Net cash used in financing activities (5,621) (12,097)
Effect of exchange rate changes on cash and cash equivalents (46) 16
Increase (decrease) in cash and cash equivalents 546 (682)
Cash and cash equivalents at beginning of period 279 985
Cash and cash equivalents at end of period 825 303
Supplemental cash flow information:    
Interest 366 363
Income taxes 340 113
Non-cash investing activities:    
Non-cash consideration for business acquisition 133
Non-cash financing activities:    
Vesting of restricted stock units $ 117