Note 12 - Stock Options Outstanding (Details)	12 Months Ended
	Sep. 30, 2015 $ / shares shares
Range One [Member]
Lower Exercise Price (in dollars per share)	$ 0.93
Upper Exercise Price (in dollars per share)	$ 1.80
Number Outstanding (in shares) | shares	916,669
Weighted Average Remaining Contractual Life	5 years 306 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 1.59
Number Exercisable (in shares) | shares	799,798
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 1.60
Range Two [Member]
Lower Exercise Price (in dollars per share)	1.86
Upper Exercise Price (in dollars per share)	$ 2.65
Number Outstanding (in shares) | shares	633,000
Weighted Average Remaining Contractual Life	5 years 54 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 2.21
Number Exercisable (in shares) | shares	438,437
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 2.30
Range Three [Member]
Lower Exercise Price (in dollars per share)	2.66
Upper Exercise Price (in dollars per share)	$ 2.90
Number Outstanding (in shares) | shares	541,500
Weighted Average Remaining Contractual Life	6 years 47 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 2.85
Number Exercisable (in shares) | shares	311,070
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 2.85
Range Four [Member]
Lower Exercise Price (in dollars per share)	2.91
Upper Exercise Price (in dollars per share)	$ 3
Number Outstanding (in shares) | shares	750,000
Weighted Average Remaining Contractual Life	6 years 222 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 3
Number Exercisable (in shares) | shares	750,000
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 3
Range Five [Member]
Lower Exercise Price (in dollars per share)	3.01
Upper Exercise Price (in dollars per share)	$ 3.17
Number Outstanding (in shares) | shares	11,250
Weighted Average Remaining Contractual Life	6 years 40 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 3.17
Number Exercisable (in shares) | shares	1,250
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 3.13
Range Six [Member]
Lower Exercise Price (in dollars per share)	0.93
Upper Exercise Price (in dollars per share)	$ 3.17
Number Outstanding (in shares) | shares	2,852,419
Weighted Average Remaining Contractual Life	5 years 346 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 2.35
Number Exercisable (in shares) | shares	2,300,555
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 2.36