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Note 4 - Stock-based Compensation (Tables)

3 Months Ended

Dec. 31, 2021

Notes Tables

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

		Three months ended December 31, 2021
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			(6,826	)			13.57
Forfeited or Expired			-				-
Outstanding as of December 31, 2021			357,418			$	25.12

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			23,636				66.43
Vested			(12,264	)			23.74
Forfeited			-				-
Unvested as of December 31, 2021			120,211			$	26.16

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

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- Definition

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