Restructuring Charge (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Charge
Adjustment to restructuring charges for inability to sublease the office space		$ 100,000
Termination fees for lease termination	900,000
Adjustment to restructuring charges for lease termination	500,000
Activity in the liabilities related to the restructuring charge
Remaining liability at the beginning of the period	605,000	605,000	1,334,000
Cash payments		(1,111,000)	(751,000)
Non-cash charges and other		12,000	22,000
Restructuring charge		654,000		1,549,000
Remaining liability at the end of the period		160,000	605,000	1,334,000
less: current portion		(160,000)
Long-term portion		0
Lease costs, net of estimated sublease income
Activity in the liabilities related to the restructuring charge
Remaining liability at the beginning of the period	613,000	613,000	1,265,000
Cash payments		(1,111,000)	(652,000)
Non-cash charges and other		4,000
Restructuring charge		654,000
Remaining liability at the end of the period		160,000	613,000
Other Costs
Activity in the liabilities related to the restructuring charge
Remaining liability at the beginning of the period	(8,000)	(8,000)	69,000
Cash payments			(99,000)
Non-cash charges and other		8,000	22,000
Remaining liability at the end of the period			$ (8,000)