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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Oct. 30, 2011
Oct. 31, 2010
Cash flows from operating activities:    
Net income $ 8,071 $ 7,749
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 2,386 2,097
Amortization of other assets 127 258
Stock-based compensation 178 204
Excess tax benefit related to stock-based compensation (39) (270)
Deferred income taxes (3,280) (1,183)
Gain (loss) on sale of equipment (128) 4
Foreign currency exchange (gains) losses (164) 60
Changes in assets and liabilities:    
Accounts receivable 4,004 5,110
Inventories (4,964) (3,363)
Other current assets 750 477
Other assets (31) (45)
Accounts payable - trade (3,382) (4,493)
Accrued expenses (754) (4,112)
Accrued restructuring (4) (37)
Income taxes (189) 121
Net cash provided by operating activities 2,581 2,577
Cash flows from investing activities:    
Capital expenditures (2,551) (5,076)
Proceeds from the sale of equipment 130 27
Purchase of short-term investments (4,789) (1,012)
Proceeds from the sale of short-term investments 2,032  
Net cash used in investing activities (5,178) (6,061)
Cash flows from financing activities:    
Proceeds from lines of credit 3,500  
Payments on lines of credit (3,500)  
Payments on long-term debt (2,305) (80)
Payments on vendor-financed capital expenditures   (188)
Proceeds from common stock issued 237 511
Common stock repurchased (4,776)  
Debt issuance costs (26) (27)
Excess tax benefit related to stock-based compensation 39 270
Net cash (used in) provided by financing activities (6,831) 486
Effect of exchange rate changes on cash and cash equivalents 42 (35)
Decrease in cash and cash equivalents (9,386) (3,033)
Cash and cash equivalents at beginning of period 23,181 [1] 18,295
Cash and cash equivalents at end of period $ 13,795 $ 15,262
[1] Derived from audited financial statements.