Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2011	Sep. 30, 2011
ASSETS
Cash and cash equivalents	$ 4,292,000	$ 1,715,000
Marketable securities at fair value (cost $74,491,000 at December 31, 2011 and $76,275,000 at September 30, 2011)	73,782,000	72,486,000
Account receivable, less allowance for doubtful accounts of $653,000 at December 31, 2011 and $582,000 at September 30, 2011	1,246,000	1,573,000
Costs and estimated earnings in excess of billings	2,076,000	4,450,000
Inventories, net	15,524,000	12,878,000
Deferred income taxes	365,000	690,000
Prepaid expenses	1,501,000	1,632,000
Total Current Assets	98,786,000	95,424,000
Property and equipment, net of accumulated depreciation	8,111,000	8,349,000
Other assets	600,000	602,000
Total Assets	107,497,000	104,375,000
LIABILITIES AND SHAREHOLDERS' EQUITY
Account payable	2,253,000	1,978,000
Customer deposits	3,120,000	756,000
Accrued expenses	2,403,000	2,842,000
Total Current Liabilities	7,776,000	5,576,000
Total Liabilities	7,776,000	5,576,000
Commitments and contingencies
Shareholder's equity:
Preferred stock, par value $.10 per share; authorized 300,000 shares; none issued
Common stock	801,000	801,000
Capital in excess of par value	9,907,000	9,860,000
Retained earnings	88,862,000	87,987,000
Total Shareholders' Equity	99,721,000	98,799,000
Total Liabilities and Shareholders' Equity	107,497,000	104,375,000
Class B Stock [Member]
Shareholder's equity:
Common stock	$ 151,000	$ 151,000