Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	May 31, 2013
Current Assets:
Cash	$ 5,275	$ 11,838
Restricted cash		600
U.S. Treasury Bills, at cost plus accrued interest	2,000	4,000
Accounts receivable	15,195	13,472
Note receivable, current	49	47
Inventories	11,234	8,732
Workers' compensation security deposit	2,597	2,597
Other current assets	383	351
Total Current Assets	36,733	41,637
Note Receivable, non-current	1,594	1,631
Property, Plant and Equipment, at Cost:
Land	4,534	4,597
Buildings and improvements	46,074	49,462
Machinery and equipment	19,986	20,572
Property, Plant and Equipment gross	70,594	74,631
Less accumulated depreciation	53,579	56,289
Net Property, Plant and Equipment	17,015	18,342
Other Assets	6,388	6,317
Total Assets	61,730	67,927
Current Liabilities:
Accounts payable, trade	3,793	3,675
Accrued salaries and wages	2,054	2,624
Accrued marketing programs	4,069	1,965
Accrued warranty and related expenses	3,921	3,682
Other accrued liabilities	3,888	2,261
Total Current Liabilities	17,725	14,207
Other Deferred Liabilities	7,658	8,069
Commitments and Contingencies - See 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	96,851	106,155
Treasury stock, at cost, 2,825,900 shares	(65,744)	(65,744)
Total Shareholders' Equity	36,347	45,651
Total Liabilities and Shareholders' Equity	$ 61,730	$ 67,927