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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Oct. 28, 2012
Oct. 30, 2011
Cash flows from operating activities:    
Net income $ 11,792 $ 8,071
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 2,539 2,386
Amortization of other assets 119 127
Stock-based compensation 197 178
Excess tax benefit related to stock-based compensation (60) (39)
Deferred income taxes (3,325) (3,280)
Gain on sale of equipment   (128)
Foreign currency exchange gains (66) (164)
Changes in assets and liabilities:    
Accounts receivable 4,353 4,004
Inventories (1,882) (4,964)
Other current assets 373 750
Other assets (80) (31)
Accounts payable - trade (7,397) (3,382)
Accrued expenses 1,310 (754)
Accrued restructuring (40) (4)
Income taxes (183) (189)
Net cash provided by operating activities 7,650 2,581
Cash flows from investing activities:    
Capital expenditures (1,946) (2,551)
Proceeds from the sale of equipment   130
Purchase of short-term investments (54) (4,789)
Proceeds from the sale of short-term investments 795 2,032
Net cash used in investing activities (1,205) (5,178)
Cash flows from financing activities:    
Proceeds from lines of credit 1,000 3,500
Payments on lines of credit (1,000) (3,500)
Payments on long-term debt (2,300) (2,305)
Proceeds from common stock issued 64 237
Common stock repurchased (5,022) (4,776)
Dividends paid (747)  
Debt issuance costs   (26)
Excess tax benefit related to stock-based compensation 60 39
Net cash used in financing activities (7,945) (6,831)
Effect of exchange rate changes on cash and cash equivalents (59) 42
Decrease in cash and cash equivalents (1,559) (9,386)
Cash and cash equivalents at beginning of period 25,023 [1] 23,181
Cash and cash equivalents at end of period $ 23,464 $ 13,795
[1] Derived from audited financial statements.