Redeemable Convertible Preferred Stock and Stockholders' Deficit (Tables)

6 Months Ended

Jun. 30, 2017

Temporary Equity And Stockholder's Equity [Abstract]

Temporary Equity

The following table presents the accretion income/(expense) of the redeemable convertible preferred stock to its redemption value recorded within the consolidated statements of changes in redeemable convertible preferred stock and stockholders’ deficit during the periods presented:

	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2017			2016		2017
Series A-1	$	1,620	$	(3,085	)	$	1,535	$	(3,785	)
Series A-2	41		(77		)	38		(95		)
Series A-3	3,275		(6,478		)	3,192		(7,843		)
Series B	13,443		(25,601		)	13,111		(31,052		)
Series C	12,352		(23,523		)	11,707		(28,531		)
Series D	10,571		(20,131		)	10,019		(24,417		)
Series E	4,695		(8,130		)	4,342		(9,936		)
Series F	8,322		(12,522		)	7,292		(15,643		)
Series G	10,763		(11,374		)	8,633		(14,388		)
Total	$	65,082	$	(110,921	)	$	59,869	$	(135,690	)

As of December 31, 2016 and June 30, 2017, the Company had outstanding redeemable convertible preferred stock as follows:

	As of December 31, 2016
	Shares Authorized	Shares Issued and Outstanding	Aggregate Liquidation Preference	Proceeds, Net of Issuance Costs
Series A-1	4,378,284	1,459,427	500,000	462,000
Series A-2	109,552	36,517	11,000	11,000
Series A-3	9,099,610	3,033,202	259,000	241,000
Series B	36,338,577	12,112,853	7,998,000	7,952,000
Series C	33,388,982	11,129,656	12,000,000	11,950,000
Series D	28,574,005	9,524,665	10,269,000	10,201,000
Series E	12,041,148	4,013,712	14,924,000	14,841,000
Series F	20,808,580	6,936,186	50,536,000	50,453,000
Series G	21,527,376	7,175,784	70,991,000	68,062,000
Total	166,266,114	55,422,002	167,488,000	164,173,000

	As of June 30, 2017
	Shares Authorized	Shares Issued and Outstanding	Aggregate Liquidation Preference	Proceeds, Net of Issuance Costs
Series A-1	4,378,284	1,459,427	500,000	462,000
Series A-2	109,552	36,517	11,000	11,000
Series A-3	9,099,610	3,033,202	259,000	241,000
Series B	36,338,577	12,112,853	7,998,000	7,952,000
Series C	33,388,982	11,129,656	12,000,000	11,950,000
Series D	28,574,005	9,524,665	10,269,000	10,201,000
Series E	12,041,148	4,013,712	14,924,000	14,841,000
Series F	20,808,580	6,936,186	50,536,000	50,453,000
Series G	21,527,376	7,175,784	70,991,000	68,062,000
Total	166,266,114	55,422,002	167,488,000	164,173,000

Schedule of Reserved Shares of Common Stock

The Company has reserved shares of common stock, on an as-converted basis, for future issuance as follows:

	December 31,	June 30,
	2016	2017
Redeemable convertible preferred stock outstanding	55,422,002	55,422,002
Stock options issued and outstanding	13,291,684	13,782,401
Shares available for future equity grants	4,941,504	4,148,810
Total	73,655,190	73,353,213