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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Feb. 28, 2013
May 31, 2012
Current Assets:    
Cash $ 9,658 $ 12,011
Restricted cash 600  
U.S. Treasury Bills, at cost plus accrued interest 6,000 16,998
Accounts receivable 13,714 11,199
Note receivable, current 46  
Inventories 10,340 8,359
Other current assets 3,183 2,903
Total Current Assets 43,541 51,470
Note Receivable, non-current 1,643  
Property, Plant and Equipment, at Cost:    
Land 3,918 3,918
Buildings and improvements 40,959 40,891
Machinery and equipment 17,952 18,122
Property, Plant and Equipment gross 62,829 62,931
Less accumulated depreciation 47,007 45,856
Net operating property, plant and equipment 15,822 17,075
Idle property, net of accumulated depreciation 3,217 4,121
Net Property, Plant and Equipment 19,039 21,196
Other Assets 6,165 6,190
Total Assets 70,388 78,856
Current Liabilities:    
Accounts payable, trade 3,560 3,296
Accrued salaries and wages 2,880 2,990
Accrued marketing programs 3,822 2,215
Accrued warranty and related expenses 4,383 3,870
Accrued workers' compensation 412 435
Other accrued liabilities 1,747 1,875
Total Current Liabilities 16,804 14,681
Other Deferred Liabilities 7,978 8,011
Commitments and Contingencies - Note 8      
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 106,110 116,668
Treasury stock, at cost, 2,825,900 shares (65,744) (65,744)
Total Shareholders' Equity 45,606 56,164
Total Liabilities and Shareholders' Equity $ 70,388 $ 78,856