Note 16 - Share-based Compensation (Tables)

12 Months Ended

Sep. 30, 2021

Notes Tables

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

	Years ended
	September 30,
	2021			2020
Volatility		48.5	%		44.5	%
Risk-free interest rate		0.7	%		1.4	%
Dividend yield		0.0	%		0.0	%
Expected term in years		6.5			5.4

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

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding September 30, 2020		303,014		$	2.82
Granted		325,365		$	7.06
Released		(228,633	)	$	2.83
Forfeited/cancelled		(277	)	$	2.26
Outstanding September 30, 2021		399,469		$	6.27

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

	Number of Shares			Weighted Average Exercise Price
Outstanding September 30, 2020		2,659,305		$	2.56
Granted		295,000		$	6.71
Forfeited/expired		(104,125	)	$	2.57
Exercised		(104,796	)	$	2.01
Outstanding September 30, 2021		2,745,384		$	3.02
Exerciseable September 30, 2021		1,541,176		$	2.24

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	-	$1.86		324,157		2.00	$	1.64		324,157	$	1.64
$1.99	-	$1.99		937,500		2.44	$	1.99		937,500	$	1.99
$2.16	-	$3.17		65,000		0.37	$	2.48		65,000	$	2.48
$3.39	-	$3.40		1,133,727		5.09	$	3.39		166,863	$	3.40
$5.05	-	$8.03		285,000		6.30	$	6.66		47,656	$	6.87
				2,745,384		3.83	$	3.02		1,541,176	$	2.24

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

	Year ended September 30,
	2021		2020
Cost of revenues	$	40	$	20
Selling, general and administrative		1,344		939
Research and development		40		21
	$	1,424	$	980