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Note 10 - Share-based Compensation Plans and Awards (Tables)

9 Months Ended

Jun. 30, 2017

Notes Tables

Share-based Compensation, Stock Options, Activity [Table Text Block]

		Number				Weighted Average
		of Shares				Exercise Price
Outstanding October 1, 2016			4,404,002			$	2.18
Granted			464,000			$	1.70
Forfeited/expired			(15,000	)		$	1.66
Outstanding June 30, 2017			4,853,002			$	2.14
Exercisable June 30, 2017			3,372,123			$	2.22

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

		Three months ended								Nine months ended
		June 30,								June 30,
		2017				2016				2017				2016
Cost of revenues		$	6,192			$	6,157			$	17,943			$	17,895
Selling, general and administrative			272,118				115,864				856,215				362,224
Research and development			23,462				26,001				69,765				76,160
Total		$	301,772			$	148,022			$	943,923			$	456,279

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		Nine months ended
		June 30,
		2017					2016
Volatility		47.5%	-	53.7%			49.0%	-	52.0%
Risk-free interest rate		1.7%	-	2.0%			1.1%	-	1.7%
Forfeiture rate		10.0%					10.0%
Dividend yield		0.0%					2.2%	-	2.7%
Expected life in years		3.8	-	4.6			3.2	-	4.6