Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operations:
Net income (loss)	$ 446,000	$ (976,000)
Adjustments to reconcile net income (loss) to cash (used in) provided by operating activities:
Purchases of marketable securities	(13,903,000)	(14,929,000)
Proceeds from sale and maturity of marketable securities	12,983,000	16,133,000
Change in fair value of marketable securities	(558,000)	632,000
Deferred income taxes	220,000	(835,000)
Depreciation and amortization	334,000	286,000
Provision for doubtful accounts		40,000
Stock-based compensation	59,000	63,000
Changes in assets and liabilities:
Accounts receivable	233,000	110,000
Costs and estimated earnings in excess of billings	(2,326,000)	1,354,000
Inventories	95,000	(3,188,000)
Prepaid expenses	(23,000)	(203,000)
Accounts payable	(237,000)	(375,000)
Customer deposits	(816,000)	3,027,000
Accrued expenses and other	(811,000)	(183,000)
Total adjustments	(4,750,000)	1,932,000
Cash flows (used in) provided by operating activities	(4,304,000)	956,000
Cash flows used in investing activities:
Capital expenditures	(251,000)	(25,000)
Cash flows used in investing activities	(251,000)	(25,000)
Net (decrease) increase in cash and cash equivalents	(4,555,000)	931,000
Cash and cash equivalents at:
Beginning of period	9,557,000	3,361,000
End of period	$ 5,002,000	$ 4,292,000