Stock Option Plan (Tables)

6 Months Ended

Feb. 29, 2020

Share-based Payment Arrangement [Abstract]

Stock option activity

The following table summarizes stock option activity for the twenty-six weeks ended February 29, 2020:

	Shares		Weighted average exercise price		Weighted average remaining contractual life (in years)
Outstanding as of August 31, 2019	2,748,735		$	13.35
Granted	194,014		24.20
Exercised	(76,366	)	12.20
Forfeited	—		—
Outstanding as of February 29, 2020	2,866,383		$	14.11	7.77
Vested and expected to vest as of February 29, 2020	2,866,383		$	14.11	7.77
Exercisable as of February 29, 2020	1,520,073		$	12.69	7.50

Restricted stock activity

The following table summarizes restricted stock unit activity for the twenty-six weeks ended February 29, 2020:

	Units		Weighted average grant-date fair value
Non-vested as of August 31, 2019	92,400		$	17.50
Granted	132,633		25.49
Vested	(50,927	)	18.20
Forfeited	(2,284	)	15.87
Non-vested as of February 29, 2020	171,822		$	23.49

Performance stock unit activity

The following table summarizes performance stock unit activity for the twenty-six weeks ended February 29, 2020:

	Units		Weighted average grant-date fair value
Non-vested as of August 31, 2019	192,389		$	11.93
Granted	121,288		27.39
Vested	—		—
Forfeited	(1,443	)	15.74
Non-vested as of February 29, 2020	312,234		$	17.92

Stock appreciation right activity

The following table summarizes SARs activity for the twenty-six weeks ended February 29, 2020:

	Shares	Weighted average exercise price		Weighted average remaining contractual life (in years)
Outstanding as of August 31, 2019	—	$	—
Granted	150,000	24.20
Exercised	—	—
Forfeited	—	—
Outstanding as of February 29, 2020	150,000	$	24.20	9.67
Vested and expected to vest as of February 29, 2020	150,000	$	24.20	9.67
Exercisable as of February 29, 2020	—	$	—	0.00