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. 10, 2019	Jun. 18, 2019	Mar. 26, 2019	Sep. 11, 2018	Jun. 19, 2018	Mar. 27, 2018	Sep. 10, 2019	Sep. 11, 2018
Numerator:
Net (loss) income	$ (7,669)	$ 2,092	$ 1,425	$ 5,874	$ 4,210	$ 3,229	$ (4,152)	$ 13,313
Denominator:
Weighted-average shares outstanding - basic (in shares)	37,023,287			38,191,335			37,000,331	38,310,842
Weighted-average shares outstanding - diluted	37,023,287			39,391,284			37,000,331	39,108,573
Net (loss) income per share - basic (in dollars per share)	$ (0.21)			$ 0.15			$ (0.11)	$ 0.35
Net (loss) income per share - diluted (in dollars per share)	$ (0.21)			$ 0.15			$ (0.11)	$ 0.34
Antidilutive stock options, unvested restricted stock awards, unvested RSUs and warrants excluded from the computations (in dollars per share)	897,881			664,760			4,587,387	307,718
Restricted Stock and RSUs [Member]
Denominator:
Dilutive effect (in shares)	0			309,973			0	333,815
Stock Options [Member]
Denominator:
Dilutive effect (in shares)	0			43,829			0	24,697
Warrants [Member]
Denominator:
Dilutive effect (in shares)	0			846,147			0	439,219