Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Nov. 30, 2011	May 31, 2011
Current Assets:
Cash	$ 8,056	$ 9,727
U.S. Treasury Bills, at cost plus accrued interest	30,995	34,994
Accounts receivable	7,944	11,477
Inventories	10,034	8,720
Other current assets	3,103	3,463
Total Current Assets	60,132	68,381
Property, Plant and Equipment, at Cost:
Land	4,063	4,063
Buildings and improvements	45,845	45,760
Machinery and equipment	23,460	23,300
Property, plant and equipment gross	73,368	73,123
Less accumulated depreciation	53,815	52,998
Total property, plant and equipment, at cost	19,553	20,125
Idle property, net of accumulated depreciation	2,970	4,677
Net Property, Plant and Equipment	22,523	24,802
Other Assets	5,993	5,916
Total Assets	88,648	99,099
Current Liabilities:
Accounts payable, trade	2,664	3,392
Accrued salaries and wages	3,021	3,089
Accrued marketing programs	3,222	1,573
Accrued warranty and related expenses	3,609	3,366
Accrued workers' compensation	1,509	822
Other accrued liabilities	1,926	2,474
Total Current Liabilities	15,951	14,716
Other Deferred Liabilities	7,436	7,344
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	125,765	137,543
Treasury stock, at cost, 2,825,900 shares	(65,744)	(65,744)
Total Shareholders' Equity	65,261	77,039
Total Liabilities and Shareholders' Equity	$ 88,648	$ 99,099