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CONDENSED CONSOLIDATED INCOME STATEMENTS (unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
CONDENSED CONSOLIDATED INCOME STATEMENTS (unaudited)    
Revenues $ 105,849 $ 99,476
Costs of services (exclusive of depreciation and amortization) 73,635 69,391
Selling, general and administrative expenses 22,743 21,650
Depreciation and amortization 2,616 2,231
Income from operations 6,855 6,204
Interest expense, net (11) (37)
Other expense, net (744) (241)
Income before provision for income taxes 6,100 5,926
Provision for income taxes 1,435 1,040
Net income $ 4,665 $ 4,886
Net income per share :    
Basic (in dollars per share) $ 0.58 $ 0.59
Diluted (in dollars per share) $ 0.56 $ 0.57
Weighted average number of shares outstanding:    
Basic (in shares) 8,015 8,285
Diluted (in shares) 8,346 8,580