Note 9 - Income Taxes (Details) - Deferred Tax Assets (Liabilities) (USD $)	Sep. 30, 2014	Sep. 30, 2013
Current:
Inventories	$ 128,900	$ 277,300
Accrued liabilities	(11,700)	63,000
Prepaid expense	(12,900)	(9,500)
	107,700	334,200
Valuation allowance	(107,700)	(334,200)
Noncurrent:
Depreciation and amortization	45,100	42,700
Research and development and other credit carryforwards	1,903,800	1,830,600
Net operating loss carryforward	1,880,200	1,817,200
Contribution carryforward	8,900	8,900
Directors stock option plan	40,000	39,000
Acquisition costs	101,000	49,700
Accrued liabilities	80,000
	4,059,000	3,788,100
Valuation allowance	(4,059,000)	(3,788,100)
Bad Debts [Member]
Current:
Bad debts	$ 3,400	$ 3,400