Note 12 - Share-based Compensation (Tables)

6 Months Ended

May 31, 2022

Notes Tables

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

	Three months ended May 31,				Six months ended May 31,
	2022		2021		2022		2021
Stock options	$	1,192	$	1,207	$	2,385	$	2,400
Performance share unit plan		859		829		1,695		1,625
Deferred share unit plan		54		59		116		112
	$	2,105	$	2,095	$	4,196	$	4,137

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

	Number of stock options (thousands)			Weighted- average exercise price per share		Weighted- average remaining contractual term (years)		Aggregate intrinsic value
November 30, 2021		8,602		$	5.43
Granted		1,987			6.71
Exercised		(1,086	)		3.99
Cancelled		(41	)		8.21
May 31, 2022		9,462		$	5.86		2.41	$	8,083
Vested and exercisable as of May 31, 2022		6,063		$	4.88		1.56	$	8,083

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

	Six months ended May 31,
	2022			2021
Weighted-average assumptions used to value stock option awards:
Expected volatility		46.5	%		47.3	%
Expected term of options (years)		4			4
Expected dividend rate		—			—
Risk-free interest rate		1.13	%		0.3	%
Expected forfeiture rate		2.9	%		3.0	%
Weighted-average grant-date fair value	$	3.16		$	3.66
Intrinsic value of options exercised	$	3,630		$	5,384
Cash received from options exercised	$	—		$	—

Schedule of Nonvested Performance-Based Units Activity [Table Text Block]

	Number of PSU awards (thousands)			Weighted- average grant day fair value per award		Aggregate intrinsic value
November 30, 2021		1,583		$	5.94
Granted		517			6.75
Vested		(745	)		3.69
Performance adjustment		(56	)		3.69
Cancelled		(11	)		7.93
May 31, 2022		1,288		$	7.65	$	1,689

Other PSU-related Information [Table Text Block]

	Six months ended May 31,
	2022			2021
Performance multiplier on PSUs vested		93	%		150	%
Common shares issued (thousands)		430			574
Total fair value of common shares issued	$	2,903		$	5,723
Withholding tax paid on PSUs vested	$	2,122		$	731