Debt - Additional Information (Details)		6 Months Ended
	Oct. 30, 2014 USD ($)	Jul. 29, 2017 USD ($) Note	Jan. 28, 2017 USD ($)
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 258,000	$ 337,000
Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 125,000,000
Line of credit facility, potential maximum borrowing capacity	$ 50,000,000
Line of credit facility, expiration date	Oct. 29, 2019
Line of credit facility, amount outstanding		53,700,000
Unamortized debt issuance costs		300,000
Line of credit facility, remaining borrowing capacity		43,700,000
Line of credit facility, average monthly outstanding amount		58,600,000
Line of credit facility, average unused excess availability		$ 46,000,000
Debt instrument interest rate		10.00%
Line of credit facility		$ 7,500,000
Line of credit facility, interest rate description		Borrowings made pursuant to the Credit Facility will bear interest at a rate equal to the base rate (determined as the highest of (a) Bank of America N.A.’s prime rate, (b) the Federal Funds rate plus 0.50% or (c) the annual ICE-LIBOR rate (“LIBOR”) for the respective interest period) plus a varying percentage, based on the Company’s borrowing base, of 0.50%-0.75% for prime-based borrowings and 1.50%-1.75% for LIBOR-based borrowings
Unused line fee		0.25%
Credit Facility | Federal Funds Rate
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.50%
Credit Facility | Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility interest rate		4.75%
Credit Facility | LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, expiration date		Aug. 01, 2017
Line of credit facility, amount outstanding		$ 47,000,000
Line of credit facility interest rate		2.69%
Credit Facility | Minimum
Debt Instrument [Line Items]
Debt Instrument Consolidated Fixed Coverage Ratio		100.00%
Credit Facility | Minimum | Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.50%
Credit Facility | Minimum | LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		1.50%
Credit Facility | Maximum | Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.75%
Credit Facility | Maximum | LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		1.75%
Master Agreement
Debt Instrument [Line Items]
Number of notes entered, equipment financing | Note		12
Notes maturity term		48 months
Master Agreement | Banc of America Leasing & Capital, LLC
Debt Instrument [Line Items]
Aggregate amount of notes borrowed		$ 26,400,000
Master Agreement | Minimum
Debt Instrument [Line Items]
Notes fixed interest rate		3.07%
Master Agreement | Maximum
Debt Instrument [Line Items]
Notes fixed interest rate		3.50%
Term Loan Facility
Debt Instrument [Line Items]
Line of credit facility, Initiation date		Oct. 30, 2014
Term Loan Facility | Term loan, due 2019
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate	6.50%
Notes fixed interest rate	1.00%
Secured term loan facility, face amount	$ 15,000,000
Secured term loan facility, effective date		Oct. 29, 2014
Debt Instrument, Interest Rate Terms		The Term Loan Facility bears interest at a rate per annum equal to the greater of (a) 1.00% and (b) the one month LIBOR rate, plus 6.50%.
Debt Instrument, Payment Terms		Interest payments are payable on the first business day of each calendar month, and increase by 2% following the occurrence and during the continuance of an “event of default,” as defined in the Term Loan Facility
Debt Instrument, Description of Variable Rate Basis		one month LIBOR rate
Debt Instrument Interest Rate Increase Decrease Of Event Of Default	2.00%
Secured term loan facility, frequency of payments		quarterly
Secured term loan facility, date of first required payment		Jan. 01, 2015
Secured term loan facility, periodic payment principal		$ 250,000
Debt instrument, maturity date		Oct. 29, 2019
Term Loan Facility | Term loan, due 2019 | Through October 29, 2017
Debt Instrument [Line Items]
Prepayments percentage		1.00%
Commercial and Standby Letters of Credit | Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 20,000,000
Swingline Loans | Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15,000,000
Standby Letters of Credit | Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount		$ 3,300,000
Documentary Letters of Credit | Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount		$ 100,000