Redeemable Convertible Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Redeemable Convertible Preferred Stock

The following table presents a summary of activity for the preferred stock issued and outstanding for the years ended December 31, 2015, 2014 and 2013 (in thousands):



	Series A			Series B			Series C			Series C-1			Series D			Series E			Total Amount
Balance, January 1, 2013	3,250			21,838			23,113			5,025			—			—			53,226
Redemption of preferred stock⁽¹⁾	(835		)	(193		)	—			—			—			—			(1,028		)
Issuance of preferred stock⁽²⁾	—			—			—			—			58,675			—			58,675
Accretion of dividends on preferred stock	144			1,273			1,636			376			4,041			—			7,470
Balance, December 31, 2013	$	2,559		$	22,918		$	24,749		$	5,401		$	62,716		$	—		$	118,343
Issuance of preferred stock⁽²⁾	—			—			—			—			—			76,985			76,985
Exercise of preferred stock warrants	—			5,982			—			7,225			—			85			13,292
Accretion of dividends on preferred stock	124			1,240			1,570			413			4,619			4,918			12,884
Conversion of preferred stock to common stock in connection with initial public offering	(2,683		)	(30,140		)	(26,319		)	(13,039		)	(67,335		)	(81,988		)	(221,504		)
Balance, December 31, 2014	$	—		$	—		$	—		$	—		$	—		$	—		$	—

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(1)	During 2013, we redeemed 1,514,698 shares of Series A and 91,460 shares of Series B stock held by investors. The differential between the redemption price and the carrying value of the shares of $5.3 million was charged to accumulated deficit in accordance with accounting for distinguishing liabilities from equity.


(2)	Includes the conversion of a convertible note.