Short-Term Borrowings and Other Debt (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2013 letters_of_credit		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Minimum	Dec. 31, 2013 Maximum	Dec. 31, 2013 Insurance Note	Jan. 31, 2013 Insurance Note	Dec. 31, 2013 Letter of Credit, San Francisco Office, Expires May 2014 Letter of Credit	Dec. 31, 2013 Letter of Credit, NY Office, Expires September 2014 Letter of Credit	Dec. 31, 2013 Letter of Credit, NY Office, Expires December 2014 Letter of Credit	Dec. 31, 2013 Letter of Credit, NY Office, Expires February 2014 Letter of Credit	Dec. 31, 2013 Letter of Credit, NY Office, Expires March 2014 Letter of Credit
Debt and Capital Lease Obligations [Line Items]
Capital Lease Obligations removed		$ 900,000
Number of Letters of Credit		5
Components of short-term borrowings and other debt
Notes payable		41,000		206,000					2,000,000
Capital lease obligations		2,523,000		3,926,000
Short-term borrowings and other debt		2,564,000		4,132,000
Interest rate								2.22%
Monthly payment								200,000
Capital Lease Obligations Incurred	6,300,000
Capital Lease Obligation, Initial Term						48 months	60 months
Capital leases, interest rate						0.60%	6.14%
Capital lease interest expense		100,000		200,000	200,000
Letter of credit, borrowing capacity										82,000	1,191,000	6,746,000	1,000,000	1,861,000
Future minimum lease payments for capital lease obligations
Capital leases, Future Minimum Payments Due, Next Twelve Months		1,402,000
Capital Leases, Future Minimum Payments Due in Two Years		1,051,000
Capital Leases, Future Minimum Payments Due in Three Years		194,000
Capital Leases, Future Minimum Payments Due in Four Years		0
Capital Leases, Future Minimum Payments Due in Five Years		0
Capital Leases, Future Minimum Payment Due Thereafter		0
Subtotal		2,647,000
Less: Amount representing interest		(124,000)	[1]
Capital lease obligations		2,523,000		3,926,000
Repayments on long-term and short-term borrowings
Notes Payable, Repayments in Next Twelve Months		46,000
Notes Payable, Repayments in Year Two		0
Notes Payable, Repayments in Year Three		0
Notes Payable, Repayments in Year Four		0
Notes Payable, Repayments in Year Five		0
Notes Payable, Repayments Due after Year Five		0
Subtotal		46,000
Less: Amount representing interest		(5,000)	[1]
Notes payable		$ 41,000		$ 206,000					$ 2,000,000

[1] Amount necessary to reduce net minimum lease payments to present value calculated at the Company's implicit rate at lease inception.