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Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Cash flows from operating activities:    
Net income $ 2,197 $ 3,141
Adjustments to reconcile net income to net cash provided by (used in) operating activities:    
Depreciation and amortization 953 867
Loss on disposal of fixed assets   1
Reduction of contingent consideration (43)  
Stock-based compensation expense 60 69
Provision for allowance for doubtful accounts 353 65
Deferred income tax expense 430 401
Changes in assets and liabilities:    
Accounts receivable 891 2,575
Transit accounts receivable (304) (5,817)
Prepaid expenses and other current assets 170 (509)
Accounts payable and accrued expenses (227) (722)
Transit accounts payable 881 8,193
Accrued payroll and related costs 1,854 1,514
Income taxes payable 233 65
Total adjustments 5,251 6,702
Net cash provided by operating activities 7,448 9,843
Cash flows from investing activities:    
Property and equipment acquired (250) (235)
Increase in deposits (109) (18)
Cash paid for acquisition (1,292)  
Payments of contingent consideration   (91)
Net cash used in investing activities (1,651) (344)
Cash flows from financing activities:    
Sale of stock for employee stock purchase plan 128 168
Exercise of stock options 314 94
Common stock repurchases (4,425) (1,838)
Net cash used in financing activities (3,983) (1,576)
Effect of exchange rate changes on cash and cash equivalents (19) (49)
Increase in cash and cash equivalents 1,795 7,874
Cash and cash equivalents at beginning of period 28,417 24,704
Cash and cash equivalents at end of period 30,212 32,578
Cash paid for:    
Interest 35 37
Income taxes 1,616 1,456
Non-cash investing activities:    
Contingent consideration recorded, not paid 930  
Above market value lease assumed in acquisition 469  
Fixed assets acquired in acquisition $ 28