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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2012
May 31, 2012
Current Assets:    
Cash $ 9,012 $ 12,011
U.S. Treasury Bills, at cost plus accrued interest 15,998 16,998
Accounts receivable 11,011 11,199
Inventories 9,750 8,359
Other current assets 3,951 2,903
Total Current Assets 49,722 51,470
Property, Plant and Equipment, at Cost:    
Land 3,918 3,918
Buildings and improvements 40,896 40,891
Machinery and equipment 18,125 18,122
Property, Plant and Equipment gross 62,939 62,931
Less accumulated depreciation 46,293 45,856
Net operating property, plant and equipment 16,646 17,075
Idle property, net of accumulated depreciation 4,016 4,121
Net Property, Plant and Equipment 20,662 21,196
Other Assets 6,242 6,190
Total Assets 76,626 78,856
Current Liabilities:    
Accounts payable, trade 4,260 3,296
Accrued salaries and wages 2,410 2,990
Accrued marketing programs 3,048 2,215
Accrued warranty and related expenses 4,198 3,870
Accrued workers' compensation 176 435
Other accrued liabilities 1,789 1,875
Total Current Liabilities 15,881 14,681
Other Deferred Liabilities 8,049 8,011
Commitments and Contingencies - See Note 6      
Shareholders' Equity:    
Common stock, $.0277 par value, 15,000,000 shares authorized; issued 11,217,144 shares 312 312
Additional paid-in capital 4,928 4,928
Retained earnings 113,200 116,668
Treasury stock, at cost, 2,825,900 shares (65,744) (65,744)
Total Shareholders' Equity 52,696 56,164
Total Liabilities and Shareholders' Equity $ 76,626 $ 78,856