Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Sep. 30, 2013
Current Assets:
Cash and cash equivalents	$ 9,737,000	$ 9,557,000
Marketable securities at fair value (cost $83,606,000 at June 30, 2014 and $81,165,000 at September 30, 2013)	87,592,000	83,113,000
Accounts receivable, less allowance for doubtful accounts of $247,000 at June 30, 2014 and $309,000 at September 30, 2013	1,149,000	1,200,000
Costs and estimated earnings in excess of billings	411,000	0
Inventories, net	12,615,000	14,126,000
Prepaid expenses and other current assets	625,000	795,000
Total Current Assets	112,129,000	108,791,000
Property and equipment, net	7,391,000	8,079,000
Other assets	70,000	78,000
Total Assets	119,590,000	116,948,000
Current Liabilities:
Accounts payable	1,045,000	1,283,000
Customer deposits	330,000	1,943,000
Accrued expenses and other current liabilities	2,226,000	2,810,000
Total Current Liabilities	3,601,000	6,036,000
Deferred and other income taxes	1,351,000	484,000
Total Liabilities	4,952,000	6,520,000
Commitments and contingencies
Shareholders' equity:
Preferred stock, par value $.10 per share; authorized 300,000 shares; none issued	0	0
Common stock	801,000	801,000
Capital in excess of par value	10,491,000	10,292,000
Retained earnings	103,195,000	99,184,000
Total Shareholders' Equity	114,638,000	110,428,000
Total Liabilities and Shareholders' Equity	119,590,000	116,948,000
Class B Stock [Member]
Shareholders' equity:
Common stock	$ 151,000	$ 151,000