Debt - Additional Information (Details) (USD $)	0 Months Ended	3 Months Ended
	Oct. 30, 2014	May 02, 2015		Jan. 31, 2015
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		40,700,000
Unamortized debt issuance costs		(603,000)	[1]	(634,000)	[1]
Line of credit facility, remaining borrowing capacity		68,300,000
Line of credit facility, average monthly outstanding amount		37,400,000
Line of credit facility, average unused excess availability		71,100,000
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%
Line of credit facility, Initiation date		Oct. 30, 2014
Term loan, due 2019
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate	6.50%
Notes fixed interest rate, minimum	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, due 2019 | 1st Anniversary
Debt Instrument [Line Items]
Prepayments percentage		4.00%
Term loan, due 2019 | 1st Anniversary Until 2nd Anniversary
Debt Instrument [Line Items]
Prepayments percentage		2.00%
Term loan, due 2019 | After second anniversary, but prior to third anniversary
Debt Instrument [Line Items]
Prepayments percentage		1.00%
Term loan, due 2019 | After third anniversary
Debt Instrument [Line Items]
Prepayments percentage		0.00%
Master Agreement
Debt Instrument [Line Items]
Number of notes entered, equipment financing		12
Notes maturity term		48 months
Notes fixed interest rate, minimum		3.07%
Notes fixed interest rate, maximum		3.50%
Master Agreement | Banc of America Leasing & Capital, LLC
Debt Instrument [Line Items]
Aggregate amount of notes borrowed		26,400,000
Master Agreement | Banc of America Leasing & Capital, LLC | 1st Anniversary
Debt Instrument [Line Items]
Prepayment penalty rate		1.00%
Master Agreement | Banc of America Leasing & Capital, LLC | 1st Anniversary Until 2nd Anniversary
Debt Instrument [Line Items]
Prepayment penalty rate		0.50%
Federal Funds Rate
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.50%
Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility interest rate		3.75%
LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, expiration date		May 04, 2015
Line of credit facility, amount outstanding		36,000,000
Line of credit facility interest rate		1.64%
Minimum
Debt Instrument [Line Items]
Debt Instrument Consolidated Fixed Coverage Ratio		100.00%
Minimum | Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.50%
Minimum | LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		1.50%
Maximum | Prime-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		0.75%
Maximum | LIBOR-based Borrowings
Debt Instrument [Line Items]
Line of credit facility, basis spread on variable rate		1.75%
Commercial and Standby Letters of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	20,000,000
Swingline Loans
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	15,000,000
Standby Letters of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount		2,200,000
Documentary Letters of Credit
Debt Instrument [Line Items]
Letters of credit outstanding, amount		$ 400,000

[1] Includes the reclassification of debt issuance costs of $0.1 million from Prepaid and other current assets and $0.5 million from “Other assets” at January 31, 2015 as a result of the Company adopting ASU 2015-03, see Note 1.