Note 15 - Share-based Compensation (Tables)

6 Months Ended

Mar. 31, 2023

Notes Tables

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

	Six months ended
	March 31
	2023		2022
Volatility		52.1%		48.1%
Risk-free interest rate		4.0%		1.5%
Dividend yield		0.0%		0.0%
Expected term in years		5.8		6.8

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding September 30, 2022		342,841		$	4.11
Granted		295,600		$	3.63
Released		(245,428	)	$	3.68
Forfeited/cancelled		-		$	-
Outstanding March 31, 2023		393,013		$	4.01

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

	Number of Shares			Weighted Average Exercise Price
Outstanding September 30, 2022		3,940,899		$	3.31
Granted		1,806,500		$	2.93
Forfeited/expired		(1,476,612	)	$	3.99
Exercised		(83,765	)	$	1.60
Outstanding March 31, 2023		4,187,022		$	2.94
Exerciseable March 31, 2023		1,698,888		$	2.59

Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

					Weighted Average		Weighted Average				Weighted Average
Range of			Number		Remaining		Exercise		Number		Exercise
Exercise Prices			Outstanding		Contractual Term		Price		Exercisable		Price
$1.31	-	$1.99		1,097,657		0.98	$	1.95		1,097,657	$	1.95
$2.69	-	$2.69		1,100,000		6.52	$	2.69		-	$	-
$3.12	-	$3.39		1,151,138		5.17	$	3.33		187,138	$	3.39
$3.40	-	$8.03		838,227		5.01	$	4.04		414,093	$	3.93
				4,187,022		4.39	$	2.94		1,698,888	$	2.59

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended				Six Months Ended
	March 31,				March 31,
	2023		2022		2023		2022
Cost of revenues	$	33	$	28	$	61	$	43
Selling, general and administrative		447		686		820		1,217
Research and development		33		23		52		35
	$	513	$	737	$	933	$	1,295