Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowances on accounts receivable	$ 784	$ 527
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	50,000,000	51,233,000
Convertible preferred stock, shares issued	0	31,397,000
Convertible preferred stock, shares outstanding	0	31,397,000
Convertible preferred stock, liquidation preference (in dollars)	$ 0	$ 133,757
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	750,000,000	82,000,000
Common stock, shares issued	49,951,000	6,879,000
Common stock, shares outstanding	49,951,000	6,879,000