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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Allowance for doubtful accounts $ 800 $ 600
Finite-lived intangible assets, accumulated amortization $ 196  
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) 37,558,379 34,525,386
Common stock, shares issued (in shares) 37,558,379 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) 32,281,936 32,942,636
Common stock, shares issued (in shares) 32,281,936 32,942,636