11. Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Schedule of convertible preferred stock

	Authorized shares		Issued shares		Carrying value		Conversion rate
	(in thousands, except for conversion rate)
Series A (Redeemable)		4,900		160	$	7,105	1:3.1731
Series C		17,500		582		21,802	1:2.3107
Series D		11,800		380		14,184	1:2.5360
Series E		11,000		345		28,055	1:3.6186
Series F		82,000		2,702		19,662	1:1.2000
Series G		45,000		1,431		14,993	1:1.0000
		172,200		5,600	$	105,801