Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Allowances	$ 3,196	$ 2,339
Preferred stock, par value (usd per share)	$ 0.0001
Preferred stock, shares authorized (in shares)	100,000,000
Preferred stock, shares issued (in shares)	0
Preferred stock, shares outstanding (in shares)	0
Common stock, par value (usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	1,000,000,000	176,000,000
Common stock, shares issued (in shares)	64,425,000	31,927,000
Common stock, shares outstanding (in shares)	64,425,000	31,927,000
Convertible Preferred Stock
Preferred stock, par value (usd per share)		$ 0.0001
Preferred stock, shares authorized (in shares)		24,000,000
Preferred stock, shares issued (in shares)		24,000,000
Preferred stock, shares outstanding (in shares)		24,000,000
Preferred stock, aggregate liquidation preference		$ 6,000