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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
OPERATING ACTIVITIES:      
Net income $ 7,701 $ 14,233 $ 6,325
Adjustments to reconcile net income to net cash provided by operating activities, net of effect of acquired businesses:      
Depreciation and amortization 8,859 7,875 6,542
Loss on disposal of property and equipment 71 2 16
GNU goodwill impairment     4,524
Impairment of intangible assets 530 0 0
GNU gain on sale of business assets (250) (3,836)  
Deferred rent 3,171 3,260 6,768
Deferred income taxes 1,651 8,399 (1,710)
Share-based compensation expenses 6,616 6,867 5,791
Excess tax benefits from share-based compensation   (393) (128)
GNU gain on extinguishment of debt     (606)
Accounts receivable allowances 3,065 666 (480)
Changes in operating assets and liabilities:      
Accounts receivable (14,358) (8,801) (3,438)
Unbilled services (7,640) (219) (772)
Prepaid expenses and other current assets, and other assets 6,067 (6,439) (2,126)
Forgivable loans 5,641 10,225 233
Incentive cash awards 1,319    
Accounts payable, accrued expenses, and other liabilities 23,415 16,324 (515)
Net cash provided by operating activities 45,858 48,163 20,424
INVESTING ACTIVITIES:      
Cash consideration paid for acquisitions (16,163)    
Purchase of property and equipment (9,757) (13,023) (17,975)
GNU cash proceeds from sale of business assets 250 1,100  
Collections on notes receivable     1,557
Payments on notes receivable     (78)
Net cash used in investing activities (25,670) (11,923) (16,496)
FINANCING ACTIVITIES:      
Issuance of common stock, principally stock options exercises 6,420 2,853 602
Borrowings under line of credit 11,500 7,500 4,000
Payments under line of credit (11,500) (7,500) (4,000)
Payments on notes payable   (75) (300)
Tax withholding payment reimbursed by shares (3,262) (1,880) (668)
Excess tax benefits from share-based compensation   393 128
Cash paid on dividend equivalent (121)    
Cash dividends paid to stockholders (4,941) (1,166)  
Repurchase of common stock (19,528) (19,315) (12,806)
Distribution to noncontrolling interest (419)    
Net cash used in financing activities (21,851) (19,190) (13,044)
Effect of foreign exchange rates on cash and cash equivalents 2,168 (1,659) (944)
Net increase (decrease) in cash and cash equivalents 505 15,391 (10,060)
Cash and cash equivalents at beginning of period 53,530 38,139 48,199
Cash and cash equivalents at end of period 54,035 53,530 38,139
Noncash investing and financing activities:      
Issuance of common stock for acquired business 3,044 44 42
Purchases of property and equipment not yet paid for 3,514 118 1,593
Purchases of property and equipment paid by a third party 1,640 92 2,785
Asset retirement obligations 120 844  
Supplemental cash flow information:      
Cash paid for taxes 7,424 6,184 9,688
Cash paid for interest $ 314 $ 405 240
Securities received from a customer for settlement of receivable     $ 192