Current Liabilities and Debt Obligations (Details) (USD $)	3 Months Ended		6 Months Ended										3 Months Ended		6 Months Ended							3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	May 11, 2012 Senior Redeemable Preferred Stock [Member]	Sep. 27, 2010 Senior Redeemable Preferred Stock [Member]	Jul. 01, 2011 IT Logistics, Inc [Member]	Jun. 30, 2012 IT Logistics, Inc [Member] Senior Redeemable Preferred Stock [Member]	Jun. 30, 2012 Wells Fargo [Member]	Jun. 30, 2012 Term Loan [Member] Wells Fargo [Member]	Dec. 31, 2011 Term Loan [Member] Wells Fargo [Member]	Jun. 30, 2012 Revolving credit [Member] Wells Fargo [Member]	Jun. 30, 2011 Revolving credit [Member] Wells Fargo [Member]	Jun. 30, 2012 Revolving credit [Member] Wells Fargo [Member]	Jun. 30, 2011 Revolving credit [Member] Wells Fargo [Member]	Dec. 31, 2011 Revolving credit [Member] Wells Fargo [Member]	Sep. 27, 2010 Revolving credit [Member] Wells Fargo [Member]	Jun. 30, 2012 Revolving credit [Member] Prime Rate [Member] Wells Fargo [Member]	Jun. 30, 2012 Revolving credit [Member] Federal Funds Rate [Member] Wells Fargo [Member]	Jun. 30, 2012 Revolving credit [Member] Libor Rate [Member] Wells Fargo [Member]	Jun. 30, 2012 Liaiblity Due in Installments [Member] IT Logistics, Inc [Member]	Jun. 30, 2012 Liaiblity Due in Installments [Member] IT Logistics, Inc [Member]	Jul. 01, 2011 Liaiblity Due in Installments [Member] IT Logistics, Inc [Member]	Nov. 01, 2012 Subordinated Promissory Note [Member] IT Logistics, Inc [Member]	Jun. 30, 2012 Subordinated Promissory Note [Member] IT Logistics, Inc [Member]	Dec. 31, 2011 Subordinated Promissory Note [Member] IT Logistics, Inc [Member]	Jul. 01, 2011 Subordinated Promissory Note [Member] IT Logistics, Inc [Member]	Jun. 30, 2012 Short-term [Member] Term Loan [Member] Wells Fargo [Member]		Jun. 30, 2012 Short-term [Member] Revolving credit [Member] Wells Fargo [Member]	Dec. 31, 2011 Short-term [Member] Revolving credit [Member] Wells Fargo [Member]	Jun. 30, 2012 Long-term [Member] Wells Fargo [Member]	Jun. 30, 2012 Long-term [Member] Term Loan [Member] Wells Fargo [Member]		Jun. 30, 2012 Long-term [Member] Revolving credit [Member] Wells Fargo [Member]
Accounts Payable and Other Accrued Payables [Abstract]
Accrued trade payables	$ 22,100,000		$ 22,100,000		$ 16,000,000
Trade account payables	4,100,000		4,100,000		5,900,000
Senior Revolving Credit Facility [Abstract]
Maximum borrowing capacity, before amendment													25,000,000		25,000,000
Maximum revolving credit facility													30,000,000		30,000,000
Amended expiration date of revolving credit facility															May 17, 2014
Term loan component of Facility													7,500,000		7,500,000
Principal amount of term loan repaid in quarterly installments															93,750
Percentage added to reference rate to compute the variable rate (in hundredths)																			1.00%	1.50%	2.00%
Percentage elected to be added to reference rate to compute the variable rate (in hundredths)																					3.75%
Maximum redemption of senior redeemable preferred stock allowed under amended Facility						4,000,000	2,500,000											2,500,000
Discount rate on senior redeemable preferred stock redemption						10.00%	10.00%
Interest rate on credit facility (in hundredths)										4.25%
Interest expense	1,672,000	1,462,000	3,480,000	2,920,000									200,000	100,000	400,000	300,000						1,000	4,000
Percentage of term loan amortized per year (in hundredths)													5.00%		5.00%
Remaining borrowing capacity													7,300,000		7,300,000		5,300,000
Outstanding borrowing of credit facility											6,800,000	6,900,000	19,100,000		19,100,000		17,900,000														375,000	375,000
Weighted average interest rates on outstanding borrowings (in hundredths)													5.30%		5.30%		6.90%
Maturities of facility presented by year [Abstract]
2012										375,000																			375,000				0	0		0
2013										375,000																			0				375,000	375,000		0
2014										18,339,000																			0				18,339,000	6,000,000		12,339,000
Total										19,089,000																			375,000	[1]			18,714,000	6,375,000	[1]	12,339,000	[2]
Notes payable - IT Logistics, Inc [Abstract]
Cash paid at inception of acquisition								8,000,000
Note payable amount due in installments																								7,000,000
Number of installments																								10
Monthly installments due																								700,000
Interest rate of notes (in hundredths)									12.00%															0.50%	6.00%
Face value of debt instrument																										15,000,000		15,000,000
Carrying amount of debt instrument																										12,400,000	12,100,000
Fair value of debt instrument																												11,700,000
Subordinated promissory notes accreted period (in months)																										60 months
Warranty Liability [Abstract]
Accrued warranty liability	$ 500,000		$ 500,000		$ 1,000,000

[1] The principal will be repaid in quarterly installments of $93,750, with a final installment of the unpaid principal amount payable on May 17, 2014.

[2] Balance due represents balance as of June 30, 2012, with fluctuating balances based on working capital requirements of the Company.