Debt - Additional Information (Detail) £ in Millions				1 Months Ended		8 Months Ended	12 Months Ended
	Oct. 27, 2017 USD ($)	Aug. 25, 2017 USD ($)	Dec. 31, 2016	Jan. 31, 2017 USD ($)	Feb. 29, 2016 USD ($)	Aug. 24, 2017	Oct. 29, 2017 USD ($)	Oct. 30, 2016 USD ($)	Oct. 29, 2017 GBP (£)	Mar. 31, 2017 USD ($)	Feb. 28, 2017 USD ($)
Extinguishment of Debt [Line Items]
Approximate weekly employee compensation, payroll taxes and payments to vendors							$ 20,000,000
Current debt outstanding							50,000,000	$ 2,050,000
Long-term debt, excluding current portion							0	$ 95,000,000
Line of Credit
Extinguishment of Debt [Line Items]
Current debt outstanding				$ 50,000,000
Current borrowing capacity				$ 160,000,000.0			132,400,000		£ 20.0
Unbilled receivable percent			15.00%	10.00%
Cash collateral for borrowed securities		$ 5,000,000								$ 25,000,000.0	$ 20,000,000.0
Minimum block on borrowing base availability		$ 10,000,000.0					35,000,000
Repayments of debt	$ 25,000,000
Fee percentage		1.80%				1.20%
Maximum permitted delinquent receivables, percent						2.00%
Borrowing capacity of facility							$ 250,000,000.0
Interest rate during period							3.10%	2.30%
Available borrowing capacity of facility							$ 19,100,000
Increase (decrease) in borrowing availability		$ 35,000,000.0
Letter of Credit
Extinguishment of Debt [Line Items]
Credit facility debt outstanding							28,300,000
Current borrowing capacity							50,000,000
Letter of Credit | Short Term Financing Program
Extinguishment of Debt [Line Items]
Credit facility debt outstanding							26,900,000
Letter of Credit, Security Deposit
Extinguishment of Debt [Line Items]
Credit facility debt outstanding							$ 1,400,000
Maintech, Incorporated | Revolving Credit Facility
Extinguishment of Debt [Line Items]
Current borrowing capacity					$ 10,000,000
Debt instrument term					364 days
Maintech, Incorporated | Letter of Credit
Extinguishment of Debt [Line Items]
Portion secured by parent					$ 3,000,000.0
Sale of Maintech or Receipt of IRS Refund | Line of Credit
Extinguishment of Debt [Line Items]
Cash collateral for borrowed securities, contingent maximum										$ 25,000,000.0
Cash collateral for borrowed securities				$ 25,000,000
Minimum | Line of Credit
Extinguishment of Debt [Line Items]
Target liquidity ratio							1.5
Maximum | Line of Credit
Extinguishment of Debt [Line Items]
Target liquidity ratio							2.0
Supply chain finance receivable							$ 5,000,000
Debt Covenant Period One | Line of Credit
Extinguishment of Debt [Line Items]
Maximum permitted delinquent receivables, percent		2.50%
Debt Covenant Period Two | Line of Credit
Extinguishment of Debt [Line Items]
Maximum permitted delinquent receivables, percent		2.25%
Debt Covenant Period Three | Line of Credit
Extinguishment of Debt [Line Items]
Maximum permitted delinquent receivables, percent		2.00%