Schedule II - Valuation and Qualifying Accounts - Summary of Valuation and Qualifying Accounts (Details) - USD ($)		12 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2014
Allowance for Doubtful Accounts [Member]
Balance at Beginning of Period		$ 10,000		$ 10,000		$ 10,000
Additions Charged to Costs and Expenses	[1]	(1,784)		(3,255)		(4,446)
Additions Charged to Other Accounts					[2]		[2]
Deductions	[3]	(1,784)		(3,255)		(4,446)
Balance at End of Period		10,000		10,000		10,000
Inventory Valuation Reserve [Member]
Balance at Beginning of Period		251,500		363,500		793,000
Additions Charged to Costs and Expenses	[4]	82,292		(47,045)		(113,603)
Additions Charged to Other Accounts
Deductions	[5]	(98,200)		64,955		315,897
Balance at End of Period		235,592		251,500		363,500
Warranty Reserves [Member]
Balance at Beginning of Period				9		89
Additions Charged to Costs and Expenses		8,912		12,555		10,275
Additions Charged to Other Accounts
Deductions		8,912		12,564		10,335
Balance at End of Period						9
Valuation Allowance of Deferred Tax Assets [Member]
Balance at Beginning of Period		4,248,900		4,166,700		4,122,300
Additions Charged to Costs and Expenses		(3,681,100)		82,200		44,400
Additions Charged to Other Accounts		67,800	[6]
Deductions
Balance at End of Period		$ 500,000		$ 4,248,900		$ 4,166,700

[1] Classified as bad debt expense.

[2] Recoveries on accounts charged off in prior years.

[3] Accounts charged off during year as uncollectible.

[4] Reduction in inventory obsolescence reserve.

[5] Inventory charged off during the year as obsolete.

[6] Recovery of net operating loss reserve.