Income Taxes (Details 2) (USD $)	Sep. 30, 2012	Sep. 30, 2011
Deferred Tax Assets:
Accrued liabilities and reserves	$ 823,000	$ 636,000
Allowance for doubtful accounts	137,000	217,000
Inventory	162,000	496,000
Net operating loss carry forward		498,000
Unrealized loss on investments		1,413,000
Other	98,000	28,000
Gross Deferred Tax Assets	1,220,000	3,288,000
Deferred and Other Tax Liabilities:
Unrealized gain on investments	(310,000)
Percentage of completion	(566,000)	(768,000)
Property, plant and equipment	(1,006,000)	(1,021,000)
Unrecognized tax benefits	(300,000)	(300,000)
Other	(12,000)	(12,000)
Gross Deferred and Other Tax Liabilities	(2,194,000)	(2,101,000)
Net Deferred Income and Other Tax Assets (Liabilities)	$ (974,000)	$ 1,187,000