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

6 Months Ended

Mar. 31, 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			(11,000	)		$	1.70
Outstanding March 31, 2017			4,857,002			$	2.13
Exercisable March 31, 2017			3,287,429			$	2.24

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

		Three months ended								Six months ended
		March 31,								March 31,
		2017				2016				2017				2016
Cost of revenues		$	5,874			$	6,101			$	11,751			$	11,738
Selling, general and administrative			148,600				128,405				584,097				246,360
Research and development			22,928				25,811				46,303				50,159
Total		$	177,402			$	160,317			$	642,151			$	308,257

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

		Six months ended
		March 31,
		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