Unaudited Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Allowance	$ 44	$ 11
Common Stock Class A
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	140,000,000	140,000,000
Common stock, shares issued (in shares)	35,425,723	34,831,118
Common stock, shares outstanding (in shares)	35,425,723	34,831,118
Common Stock Class B
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	35,000,000	35,000,000
Common stock, shares issued (in shares)	15,777,083	15,657,089
Common stock, shares outstanding (in shares)	15,777,083	15,657,089