Consolidated Balance Sheets (USD $)	Sep. 30, 2014	Sep. 30, 2013
Current assets:
Cash and cash equivalents	$ 7,193,000	$ 9,557,000
Marketable securities at fair value (cost of $84,997,000 at September 30, 2014 and $81,165,000 at September 30, 2013)	87,112,000	83,113,000
Accounts receivable, less allowance for doubtful accounts of $244,000 at September 30, 2014 and $309,000 at September 30, 2013	1,448,000	1,200,000
Costs and estimated earnings in excess of billings	344,000
Inventories, net	13,673,000	14,126,000
Prepaid expenses	849,000	795,000
Total current assets	110,619,000	108,791,000
Property and equipment, net	7,141,000	8,079,000
Other assets	68,000	78,000
Total Assets	117,828,000	116,948,000
Current liabilities:
Accounts payable	947,000	1,283,000
Customer deposits	324,000	1,943,000
Accrued expenses	1,689,000	2,810,000
Total current liabilities	2,960,000	6,036,000
Deferred and other income taxes	693,000	484,000
Total liabilities	3,653,000	6,520,000
Commitments and contingencies
Shareholders' equity:
Preferred stock, par value $.10 per share; 300,000 shares authorized; none issued	0	0
Capital in excess of par value	10,566,000	10,292,000
Retained earnings	102,657,000	99,184,000
Total shareholders' equity	114,175,000	110,428,000
Total Liabilities and Shareholders' Equity	117,828,000	116,948,000
Common Stock [Member]
Shareholders' equity:
Common stock	801,000	801,000
Total shareholders' equity	801,000	801,000
Class B Stock [Member]
Shareholders' equity:
Common stock	151,000	151,000
Total shareholders' equity	$ 151,000	$ 151,000