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Redeemable Convertible Preferred Stock and Stockholders’ Deficit (Tables)
 12 Months Ended
Dec. 31, 2018
Stockholders Equity Note [Abstract]  
Summary of Authorized, Issued, and Outstanding Shares of Preferred Stock and Carrying Amounts and Liquidation Values

 

As of December 31, 2017, the authorized, issued, and outstanding shares of Preferred Stock and their carrying amounts and liquidation values were as follows:

 

 

 

 

 

 

 

Shares Issued

 

 

 

 

 

 

 

 

 

 

 

Shares

 

 

and

 

 

Carrying

 

 

Liquidation

 

 

 

Authorized

 

 

Outstanding

 

 

Amount

 

 

Value

 

Series 1

 

 

132,255

 

 

 

132,255

 

 

$

522,266

 

 

$

526,778

 

Series 2

 

 

1

 

 

 

1

 

 

 

240,242

 

 

 

250,000

 

Series AA

 

 

575,470

 

 

 

573,961

 

 

 

7,615,583

 

 

 

7,619,998

 

Series B

 

 

6,382,259

 

 

 

6,251,502

 

 

 

60,366,480

 

 

 

60,379,282

 

Series C-1

 

 

4,524,375

 

 

 

2,174,280

 

 

 

20,888,972

 

 

 

20,999,997

 

Series C-2

 

 

916,095

 

 

 

—

 

 

 

—

 

 

 

—

 

Series C-3

 

 

790,895

 

 

 

—

 

 

 

—

 

 

 

—

 

Total

 

 

13,321,350

 

 

 

9,131,999

 

 

$

89,633,543

 

 

$

89,776,055