Note 9 - Deferred Tax Assets (Liabilities) (Details) - USD ($)	Sep. 30, 2015	Sep. 30, 2014
Current:
Inventories	$ 81,500	$ 128,900
Bad debts	3,400	3,400
Accrued liabilities	70,600	(11,700)
Prepaid expense	(13,400)	(12,900)
	142,100	107,700
Valuation allowance	(142,100)	(107,700)
Total current deferred income taxes	0	0
Noncurrent:
Depreciation and amortization	46,700	45,100
Research and development and other credit carryforwards	1,980,200	1,903,800
Net operating loss carryforward	$ 1,914,300	1,880,200
Contribution carryforward		8,900
Directors stock option plan	$ 40,100	40,000
Acquisition costs	$ 125,500	101,000
Accrued liabilities		80,000
	$ 4,106,800	4,059,000
Valuation allowance	(4,106,800)	(4,059,000)
Total long-term deferred income taxes	$ 0	$ 0
Total