CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 92	$ 185
Preferred stock, par value (in dollars per share)	$ 0.1000	$ 0.1000
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A
Common stock, par value (in dollars per share)	$ 0.1000	$ 0.1000
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	101,482,466	38,255,490
Common stock, shares outstanding (in shares)	96,241,328	34,413,634
Class V
Common stock, par value (in dollars per share)	$ 0.1000	$ 0.1000
Common stock, shares authorized (in shares)	40,000,000
Common stock, shares issued (in shares)	33,827,371	33,373,294
Common stock, shares outstanding (in shares)	33,827,371	33,373,294