Note 9 - Income Taxes (Details) - Deferred tax assets (liabilities) consist of the following: (USD $)	Sep. 30, 2013	Sep. 30, 2012
Current:
Inventories	$ 277,300	$ 295,300
Accrued liabilities	63,000	45,600
Prepaid expense	(9,500)	(11,500)
	334,200	332,800
Valuation allowance	(334,200)	(332,800)
Noncurrent:
Depreciation and amortization	42,700	53,400
Research and development and other credit carryforwards	1,830,600	1,716,300
Net operating loss carryforward	1,817,200	1,934,200
Contribution carryforward	8,900	163,200
Directors stock option plan	39,000	36,800
Acquisition costs	49,700
	3,788,100	3,903,900
Valuation allowance	(3,788,100)	(3,903,900)
Bad Debts [Member]
Current:
Bad debts	$ 3,400	$ 3,400