Schedule II - Valuation and Qualifying Accounts - Summary of Valuation and Qualifying Accounts (Details) - USD ($)		12 Months Ended
		Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2015
Balance at End of Period		$ 500,000
Allowance for Doubtful Accounts [Member]
Balance at Beginning of Period		10,000		$ 10,000		$ 10,000
Additions Charged to Costs and Expenses	[1]	275		(1,784)		(3,255)
Additions Charged to Other Accounts					[2]		[2]
Deductions	[3]			(1,784)		(3,255)
Balance at End of Period		10,275		10,000		10,000
Inventory Valuation Reserve [Member]
Balance at Beginning of Period		235,592		251,500		363,500
Additions Charged to Costs and Expenses	[4]	284,352		82,292		(47,045)
Additions Charged to Other Accounts
Deductions	[5]	(37,297)		(98,200)		64,955
Balance at End of Period		473,252		235,592		251,500
Warranty Reserves [Member]
Balance at Beginning of Period						9
Additions Charged to Costs and Expenses				8,912		12,555
Additions Charged to Other Accounts
Deductions				8,912		12,564
Balance at End of Period		0
Valuation Allowance of Deferred Tax Assets [Member]
Balance at Beginning of Period		500,000		4,248,900		4,166,700
Additions Charged to Costs and Expenses				(3,681,100)		82,200
Additions Charged to Other Accounts			[6]	67,800
Deductions
Balance at End of Period		$ 500,000		$ 500,000		$ 4,248,900

[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.