CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Allowance for doubtful accounts	$ 800	$ 600
Finite-lived intangible assets, accumulated amortization	$ 96
Class A Common Stock
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares outstanding (in shares)	34,731,245	34,525,386
Common stock, shares issued (in shares)	34,731,245	34,525,386
Class B Common Stock
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	32,913,836	32,942,636
Common stock, shares issued (in shares)	32,913,836	32,942,636