Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Feb. 29, 2020	Nov. 30, 2019	Feb. 23, 2019	Nov. 24, 2018	Feb. 29, 2020	Feb. 23, 2019
Numerator:
Net income	$ 10,657	$ (4,793)	$ 12,722	$ 15,257	$ 5,864	$ 27,979
Denominator:
Weighted average common shares - basic (in shares)	95,339,489		81,900,352		92,524,061	79,595,330
Basic earnings per share from net income (in dollars per share)	$ 0.11		$ 0.16		$ 0.06	$ 0.35
Numerator:
Net income	$ 10,657	$ (4,793)	$ 12,722	$ 15,257	$ 5,864	$ 27,979
Denominator:
Weighted average common shares - basic (in shares)	95,339,489		81,900,352		92,524,061	79,595,330
Public and Private Warrants	3,706,986		2,745,135		3,766,141	3,818,870
Employee stock options	1,173,631		664,950		1,194,968	612,304
Non-vested shares	116,465		39,759		112,444	35,975
Weighted average common shares - diluted (in shares)	100,336,571		85,350,196		97,597,614	84,062,479
Diluted earnings per share from net income (in dollars per share)	$ 0.11		$ 0.15		$ 0.06	$ 0.33
Stock Options
Earnings per share, diluted
Antidilutive securities excluded from computation of earnings per share	400,000		400,000		300,000	300,000
Restricted Stock Units
Earnings per share, diluted
Antidilutive securities excluded from computation of earnings per share			100,000			100,000