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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Jan. 27, 2013
Jan. 29, 2012
Cash flows from operating activities:    
Net income $ 14,614 $ 9,873
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 3,818 3,600
Amortization of other assets 178 183
Stock-based compensation 308 258
Excess tax benefit related to stock-based compensation (77) (39)
Deferred income taxes (2,370) (2,751)
Gain on sale of equipment   (157)
Foreign currency exchange gains 153 (196)
Changes in assets and liabilities:    
Accounts receivable 776 (1,769)
Inventories (5,794) (4,045)
Other current assets 353 (159)
Other assets (92) (49)
Accounts payable - trade (4,395) (1,709)
Accrued expenses 3,526 (1)
Accrued restructuring (40) (4)
Income taxes (141) (305)
Net cash provided by operating activities 10,817 2,730
Cash flows from investing activities:    
Capital expenditures (2,763) (3,715)
Proceeds from the sale of equipment   188
Proceeds from life insurance policies 626  
Purchase of short-term investments (84) (4,821)
Proceeds from the sale of short-term investments 795 4,096
Net cash used in investing activities (1,426) (4,252)
Cash flows from financing activities:    
Proceeds from lines of credit 1,000 6,323
Payments on lines of credit (1,325) (5,500)
Payments on long-term debt (2,350) (2,354)
Proceeds from common stock issued 205 237
Common stock repurchased (5,022) (5,384)
Dividends paid (7,226)  
Debt issuance costs   (26)
Excess tax benefit related to stock-based compensation 77 39
Net cash used in financing activities (14,641) (6,665)
Effect of exchange rate changes on cash and cash equivalents (284) 102
Decrease in cash and cash equivalents (5,534) (8,085)
Cash and cash equivalents at beginning of period 25,023 [1] 23,181
Cash and cash equivalents at end of period $ 19,489 $ 15,096
[1] Derived from audited financial statements.