Debt (Details) (USD $)	3 Months Ended		9 Months Ended		0 Months Ended	9 Months Ended	0 Months Ended	6 Months Ended		40 Months Ended		0 Months Ended	3 Months Ended	9 Months Ended							1 Months Ended	6 Months Ended	12 Months Ended									1 Months Ended		3 Months Ended	9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	May 24, 2012 Parent Company Financing Agreement [Member]	Dec. 31, 2012 Parent Company Financing Agreement [Member]	May 24, 2012 Parent Company Financing Agreement [Member] Term Loans [Member]	Sep. 30, 2013 Parent Company Financing Agreement [Member] Term Loans [Member]	Mar. 31, 2013 Parent Company Financing Agreement [Member] Term Loans [Member]	Jan. 17, 2017 Parent Company Financing Agreement [Member] Term Loans [Member]	May 23, 2012 Parent Company Financing Agreement [Member] Term Loans [Member]	May 24, 2012 Parent Company Financing Agreement [Member] Term Loans [Member] Cerberus Warrant [Member]	Dec. 31, 2012 Parent Company Financing Agreement [Member] Term Loans [Member] Cerberus Warrant [Member]	Dec. 31, 2012 Parent Company Financing Agreement [Member] Term Loans [Member] Cerberus Warrant [Member]	Aug. 31, 2012 Parent Company Financing Agreement [Member] Term Loans [Member] Cerberus Warrant [Member]	Dec. 31, 2012 Parent Company Financing Agreement [Member] Revolving Facility [Member]	Mar. 31, 2012 Parent Company Financing Agreement [Member] Revolving Facility [Member]	Dec. 31, 2012 Parent Company Financing Agreement [Member] Revolving Facility [Member] Letter of Credit [Member]	Dec. 31, 2012 Parent Company Financing Agreement [Member] Revolving Facility [Member] Commercial Letter Of Credit [Member]	Dec. 31, 2012 Parent Company Financing Agreement [Member] Revolving Facility [Member] Standby Letters of Credit [Member]	Aug. 31, 2012 Fenco Credit Agreement [Member]	Sep. 30, 2013 Fenco Credit Agreement [Member] Term Loans [Member]	Sep. 30, 2014 Fenco Credit Agreement [Member] Term Loans [Member]	May 06, 2011 Fenco Credit Agreement [Member] Term Loans [Member]	Jan. 01, 2013 Fenco Credit Agreement [Member] Revolving Facility [Member]	Dec. 31, 2012 Fenco Credit Agreement [Member] Revolving Facility [Member]	Aug. 31, 2012 Fenco Credit Agreement [Member] Revolving Facility [Member]	Mar. 31, 2012 Fenco Credit Agreement [Member] Revolving Facility [Member]	May 06, 2011 Fenco Credit Agreement [Member] Revolving Facility [Member]	Dec. 31, 2012 Fenco Credit Agreement [Member] Revolving Facility [Member] Canadian Operations [Member]	Dec. 31, 2012 Fenco Credit Agreement [Member] Revolving Facility [Member] Commercial Letter Of Credit [Member]	Aug. 31, 2012 Strategic Cooperation Agreement [Member]	Aug. 31, 2012 Strategic Cooperation Agreement [Member] Supplier Warrant [Member]	Dec. 31, 2012 Strategic Cooperation Agreement [Member] Supplier Warrant [Member]	Dec. 31, 2012 Strategic Cooperation Agreement [Member] Supplier Warrant [Member]	Aug. 22, 2012 Strategic Cooperation Agreement [Member] Supplier Warrant [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 85,000,000				$ 75,000,000					$ 20,000,000		$ 10,000,000						$ 10,000,000	$ 50,000,000		$ 55,000,000		$ 50,000,000			$ 22,000,000
Debt instrument, maturity date						Jan. 17, 2017															Oct. 06, 2014											Jul. 31, 2017
Authorized amount of additional investment in subsidiary						20,000,000
Additional borrowings							10,000,000
Reference interest rate							LIBOR
Interest rate over LIBOR rate under option 1 (in hundredths)							8.50%
Interest rate above LIBOR rate under option 2 (in hundredths)							7.50%
Quarterly principal payments								600,000	250,000	1,350,000												500,000	1,000,000
Financial covenants related to cash equivalents, removed under third amendment					10,000,000
Outstanding balance under revolving loan																0	0		2,178,000	626,000						49,729,000		48,884,000			712,000
Amount available under revolving facility																15,137,000										3,761,000
Credit facility reserved for certain expenses																										136,000				300,000
Credit facility available for accrued interest and other amounts payable																																2,000,000
Payment terms under the Strategic Cooperation Agreement																																120 days
Interest rate (in hundredths)																																1.00%
Minimum value of new automotive parts and components to be purchased under the agreement																																33,000,000
Maximum receivable sale option under the Strategic Cooperation Agreement																																8,000,000
Common stock issuances to settle obligations under the receivable sale option (in dollars per share)																																$ 7.75
Cash payments to settle obligations under the receivable sale option (in hundredths)																																1.35%
Number of shares that can be purchased under warrants (in shares)												100,000			219,355																		516,129
Initial exercise price (in dollars per share)												$ 17.00			$ 7.75																		$ 7.75
Warrant term												5 years																					2 years
Aggregate maximum number of shares obligated to issued under the Receivable Sale Option and Supplier Warrants (in shares)																																1,032,258
Fair value of warrants issued												607,000	571,000	571,000																				1,879,000	1,879,000	1,018,000
Total (gain) loss included in net loss (gain)	$ 882,000	$ 0	$ 825,000	$ 0									$ 214,000	$ (36,000)																				$ 668,000	$ 861,000
Interest rate added to federal funds rate (in hundredths)																										0.50%