Note 6 - Stock-based Compensation (Tables)

9 Months Ended

Jun. 30, 2022

Notes Tables

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

	Nine months ended June 30, 2022
Dividend yield		0	%
Expected volatility		52.02	%
Risk-free interest rate		0.97	%
Expected life (years)		3.5
Vesting period (years)		3

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

	Number of options			Weighted average exercise price
Outstanding as of September 30, 2021		301,514		$	16.25
Granted		62,730			66.48
Exercised		(20,169	)		13.70
Forfeited or Expired		(2,084	)		19.94
Outstanding as of June 30, 2022		341,991		$	25.59

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Number of shares			Weighted average grant date fair value
Unvested shares as of September 30, 2021		108,839		$	17.14
Granted		29,512			65.90
Vested		(14,384	)		25.02
Forfeited		(2,749	)		16.84
Unvested as of June 30, 2022		121,218		$	28.08