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CONSOLIDATED STATEMENTS OF NET INCOME (UNAUDITED) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Nov. 02, 2014
Oct. 27, 2013
Nov. 02, 2014
Oct. 27, 2013
Income Statement [Abstract]        
Net sales $ 73,991 $ 70,589 $ 150,051 $ 140,730
Cost of sales 61,713 58,354 125,058 115,422
Gross profit 12,278 12,235 24,993 25,308
Selling, general and administrative expenses 7,379 7,200 14,798 14,299
Income from operations 4,899 5,035 10,195 11,009
Interest expense   99 67 239
Interest income (153) (102) (294) (195)
Other expense 162 224 73 616
Income before income taxes 4,890 4,814 10,349 10,349
Income taxes 1,889 1,718 4,003 4,023
Net income $ 3,001 $ 3,096 $ 6,346 $ 6,326
Net income per share, basic $ 0.25 $ 0.25 $ 0.52 $ 0.52
Net income per share, diluted $ 0.24 $ 0.25 $ 0.51 $ 0.51
Average shares outstanding, basic 12,218 12,183 12,215 12,165
Average shares outstanding, diluted 12,401 12,389 12,403 12,391