Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Allowance for doubtful accounts $ 843 $ 1,084
Preferred stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Preferred stock, authorized (shares) 10,000,000 10,000,000
Preferred Stock, issued (in shares) 0 0
Preferred stock, outstanding (in shares) 0 0
Assets, Current $ 66,865 $ 96,083
Assets $ 102,204 $ 122,650
Class A Common Stock    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized (in shares) 125,000,000 125,000,000
Common stock, issued (in shares) 16,943,000 13,322,000
Common stock, outstanding (in shares) 16,943,000 13,322,000
Class B Common Stock    
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, authorized (in shares) 10,000,000 10,000,000
Common stock, issued (in shares) 2,436,000 3,491,000
Common stock, outstanding (in shares) 2,436,000 3,491,000
Class C Common Stock    
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, authorized (in shares) 100,000,000 100,000,000
Common stock, issued (in shares) 70,301,000 76,039,000
Common stock, outstanding (in shares) 70,301,000 76,039,000