(Loss) Earnings Per Share - Schedule of Basic and Diluted Net Income per Share Data (Detail) - USD ($)	3 Months Ended						8 Months Ended
	Sep. 08, 2020	Jun. 16, 2020	Mar. 24, 2020	Sep. 10, 2019	Jun. 18, 2019	Mar. 26, 2019	Sep. 08, 2020	Sep. 10, 2019
Net income (loss)
Net loss	$ 5,797,000	$ (576,000)	$ (102,468,000)	$ (7,669,000)	$ 2,092,000	$ 1,425,000	$ (97,247,000)	$ (4,152,000)
Weighted-average shares outstanding - diluted
Weighted-average shares outstanding - basic (in shares)	37,293,390			37,023,287			37,152,419	37,000,331
Weighted-average shares outstanding - diluted	37,420,043			37,023,287			37,152,419	37,000,331
Net (loss) income per share - basic (in dollars per share)	$ 0.16			$ (0.21)			$ (2.62)	$ (0.11)
Net (loss) income per share - diluted (in dollars per share)	$ 0.15			$ (0.21)			$ (2.62)	$ (0.11)
Antidilutive stock options, unvested restricted stock awards, unvested RSUs and warrants excluded from the computations (in dollars per share)	1,929,726			897,881			5,137,453	4,587,387
Warrants and Rights Outstanding	$ 5,105,982						$ 5,105,982
Restricted Stock and RSUs
Weighted-average shares outstanding - diluted
Dilutive effect (in shares)	126,653			0			0	0
Stock Options
Weighted-average shares outstanding - diluted
Dilutive effect (in shares)	0			0			0	0
Warrants
Weighted-average shares outstanding - diluted
Dilutive effect (in shares)	0			0			0	0