CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Preferred stock, shares issued (in shares)	0
Common stock, par value (in dollars per share)		$ 0.000273235
Convertible Preferred Shares (Series A, B and C)
Convertible preferred shares, par value (in dollars per share)	$ 0.000273235	$ 0.000273235
Preferred stock, shares issued (in shares)	0	22,885,492
Preferred stock, shares outstanding (in shares)	0	22,885,492
Preferred stock, aggregate liquidation preference	$ 0	$ 120,000
Class A common shares
Common stock, par value (in dollars per share)	$ 0.000273235	$ 0.000273235
Common stock, shares issued (in shares)	15,772,257	719,976
Common stock, shares outstanding (in shares)	15,772,257	719,976
Class B common shares
Common stock, par value (in dollars per share)	$ 0.000273235	$ 0.000273235
Common stock, shares issued (in shares)	4,638,855	3,568,353
Common stock, shares outstanding (in shares)	4,638,855	3,568,353
Class A1 common shares
Common stock, par value (in dollars per share)	$ 0.000273235	$ 0.000273235
Common stock, shares issued (in shares)	12,995,954	0
Common stock, shares outstanding (in shares)	12,995,954	0
Class B1 common shares
Common stock, par value (in dollars per share)	$ 0.000273235	$ 0.000273235
Common stock, shares issued (in shares)	16,057,618	0
Common stock, shares outstanding (in shares)	16,057,618	0

Face amount or stated value per share of common stock.

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