Note 12 - Share-based Compensation (Details) - Stock options outstanding (USD $)	12 Months Ended
	Sep. 30, 2013
Range1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Limit	$ 0.46
Exercise Prices,Upper Limit	$ 1.00
Number Outstanding (in Shares)	333,976
Weighted Average Remaining Contractual Life	109 days
Weighted Average Exercise Price	$ 0.49
Number Exercisable (in Shares)	329,976
Weighted Average Exercise Price	$ 0.48
Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Limit	$ 1.01
Exercise Prices,Upper Limit	$ 1.50
Number Outstanding (in Shares)	906,500
Weighted Average Remaining Contractual Life	4 years 94 days
Weighted Average Exercise Price	$ 1.27
Number Exercisable (in Shares)	776,843
Weighted Average Exercise Price	$ 1.26
Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Limit	$ 1.51
Exercise Prices,Upper Limit	$ 2.00
Number Outstanding (in Shares)	12,500
Weighted Average Remaining Contractual Life	6 years 321 days
Weighted Average Exercise Price	$ 1.57
Number Exercisable (in Shares)	6,156
Weighted Average Exercise Price	$ 1.63
Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Limit	$ 2.01
Exercise Prices,Upper Limit	$ 2.50
Number Outstanding (in Shares)	276,000
Weighted Average Remaining Contractual Life	7 years 80 days
Weighted Average Exercise Price	$ 2.26
Number Exercisable (in Shares)	274,125
Weighted Average Exercise Price	$ 2.26
Range 5 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Limit	$ 2.51
Exercise Prices,Upper Limit	$ 3.13
Number Outstanding (in Shares)	865,500
Weighted Average Remaining Contractual Life	7 years 284 days
Weighted Average Exercise Price	$ 2.95
Number Exercisable (in Shares)	672,156
Weighted Average Exercise Price	$ 2.94
Range 6 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices, Lower Limit	$ 0.46
Exercise Prices,Upper Limit	$ 3.13
Number Outstanding (in Shares)	2,394,476
Weighted Average Remaining Contractual Life	5 years 124 days
Weighted Average Exercise Price	$ 1.89
Number Exercisable (in Shares)	2,059,256
Weighted Average Exercise Price	$ 1.82