Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts	$ 960	$ 1,050
Property and equipment, accumulated depreciation	3,342	3,077
Intangible assets, accumulated amortization	$ 13,972	$ 10,315
Common stock, par value (in dollars per share)		$ 0.0001
Common stock, shares authorized	250,000,000	52,333,333
Common stock, shares outstanding	49,638,808	7,722,262
Common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	250,000,000	52,333,333
Common stock, shares issued	49,638,808	7,722,262
Common stock, shares outstanding	49,638,808	7,722,262
Series II common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	2,333,333	2,333,333
Common stock, shares issued	1,047,357	1,047,357
Common stock, shares outstanding	1,047,357	1,047,357