Debt - Additional Information (Detail) (USD $)	1 Months Ended		12 Months Ended
	May 31, 2012	Jul. 16, 2010	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Line of credit			$ 500,000	$ 1,000,000
Gain on extinguishment of long-term debt				396,000
Long-term debt			17,200,000	47,052,000
Trade accounts receivable, net
Debt Instrument [Line Items]
Assets pledged under line of credit and term loans			3,900,000
Inventories
Debt Instrument [Line Items]
Assets pledged under line of credit and term loans			10,400,000
Line of credit
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity			4,000,000
Debt, due date			Sep. 29, 2014
Line of credit			500,000	1,000,000
Line of credit, available borrowing capacity			3,500,000
Debt, interest rate			4.00%
Debt, interest expense			100,000	100,000
Notes Payable
Debt Instrument [Line Items]
Debt, interest expense			3,400,000	3,400,000
Debt, interest rate		9.00%
Cash received by TOPrS		39,000,000
Debt, maturity date		2016-12
Debt instrument, acquired	1,800,000
Repayment of notes payable	1,400,000
Repayments of Debt			37,246,000
Long-term debt				37,246,000
Term Loans
Debt Instrument [Line Items]
Debt, interest expense			300,000	400,000
Long-term debt			17,200,000	6,900,000
Debt instrument, variable interest rate			5.00%
Debt, variable interest rate description			As of December 31, 2013, the interest rate on the variable rate term loan was 5.00%. In the event of default, the interest rates increase by 5.00% per annum.
Debt, interest rate increment in the event of default			5.00%
Term Loans | 2016
Debt Instrument [Line Items]
Debt, due date			Sep. 29, 2016
Long-term debt			5,700,000	6,900,000
Debt, face amount			8,000,000
Debt instrument, variable interest rate			1.00%
Term Loans | 2018
Debt Instrument [Line Items]
Debt, due date			Dec. 31, 2018
Debt, interest rate			5.00%
Long-term debt			11,500,000	0
Debt, face amount			11,500,000
Aggregate amount of new loan			5,000,000
Senior debt to EBITDA ratio			150.00%
Guarantee obligations term			The guarantee is effective until such time as Industrial Supply’s senior debt to earnings before interest, taxes, depreciation and amortization (“EBITDA”) ratio is reduced to 1.5:1.0 (as long as no event of default has occurred and is continuing).
Guarantee obligations origin and purpose			Under the terms of the New Loan, Signature has guaranteed the New Loan in the aggregate amount of $5.0 million should Industrial Supply not meet its obligations under the loan agreement. The guarantee is effective until such time as Industrial Supply’s senior debt to earnings before interest, taxes, depreciation and amortization (“EBITDA”) ratio is reduced to 1.5:1.0 (as long as no event of default has occurred and is continuing).
Seller Notes
Debt Instrument [Line Items]
Debt, interest expense			100,000	200,000
Long-term debt			0	2,906,000
Debt, face amount			$ 5,000,000