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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Jan. 29, 2012
Jan. 30, 2011
Cash flows from operating activities:    
Net income $ 9,873 $ 10,174
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 3,600 3,205
Amortization of other assets 183 385
Stock-based compensation 258 280
Excess tax benefit related to stock-based compensation (39) (285)
Deferred income taxes (2,751) (1,219)
(Gain) loss on sale of equipment (157) 15
Foreign currency exchange (gains) losses (196) 33
Changes in assets and liabilities:    
Accounts receivable (1,769) 3,053
Inventories (4,045) (291)
Other current assets (159) 204
Other assets (49) 13
Accounts payable - trade (1,709) (5,459)
Accrued expenses (1) (3,822)
Accrued restructuring (4) (253)
Income taxes (305) 379
Net cash provided by operating activities 2,730 6,412
Cash flows from investing activities:    
Capital expenditures (3,715) (5,580)
Proceeds from the sale of equipment 188 27
Purchase of short-term investments (4,821) (4,532)
Proceeds from the sale of short-term investments 4,096 2,037
Net cash used in investing activities (4,252) (8,048)
Cash flows from financing activities:    
Proceeds from lines of credit 6,323  
Payments on lines of credit (5,500)  
Payments on long-term debt (2,354) (129)
Payments on vendor-financed capital expenditures   (188)
Proceeds from common stock issued 237 591
Common stock repurchased (5,384)  
Debt issuance costs (26) (27)
Excess tax benefit related to stock-based compensation 39 285
Net cash (used in) provided by financing activities (6,665) 532
Effect of exchange rate changes on cash and cash equivalents 102 68
Decrease in cash and cash equivalents (8,085) (1,036)
Cash and cash equivalents at beginning of period 23,181 [1] 18,295
Cash and cash equivalents at end of period $ 15,096 $ 17,259
[1] Derived from audited financial statements.