Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Accounts receivable, allowance for doubtful accounts	$ 0	$ 0
Class A Common Stock [Member]
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	150,000,000	50,000,000
Common stock, shares issued (in shares)	17,869,643	16,896,693
Common stock, shares outstanding (in shares)	17,869,643	16,896,693
Class B Common Stock [Member]
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	5,307,816	2,409,738
Common stock, shares issued (in shares)	1,695,938	1,802,606
Common stock, shares outstanding (in shares)	1,695,938	1,802,606