Earnings per Share - Schedule of Basic and Diluted Net Income per Share Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 12, 2017	Sep. 06, 2016	Sep. 12, 2017	Sep. 06, 2016
Numerator:
Net income	$ 5,101	$ 4,949	$ 14,669	$ 12,874
Denominator:
Weighted-average shares outstanding - basic (in shares)	38,695,099	38,465,064	38,744,963	38,518,431
Weighted-average shares outstanding - diluted	39,839,571	38,688,961	40,016,062	38,682,273
Net (loss) income per share - basic (in dollars per share)	$ 0.13	$ 0.13	$ 0.38	$ 0.33
Net (loss) income per share - diluted (in dollars per share)	$ 0.13	$ 0.13	$ 0.37	$ 0.33
Antidilutive stock options, unvested restricted stock awards, unvested RSUs and warrants excluded from the computations (in dollars per share)	469,691	10,829,117	188,369	12,126,069
Restricted Stock and RSUs [Member]
Denominator:
Dilutive effect (in shares)	319,624	223,897	430,589	163,842
Stock Options [Member]
Denominator:
Dilutive effect (in shares)	30,477	0	25,673	0
Warrants [Member]
Denominator:
Dilutive effect (in shares)	794,371	0	814,837	0