XML 56 R3.htm IDEA: XBRL DOCUMENT v3.21.1
Consolidated statement of financial position (Parenthetical) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Class A common stock [member]    
Statement [LineItems]    
Common stock, shares issued 33,861,872 33,835,747
Common stock, shares outstanding 31,421,265 31,337,856
Class B common stock [member]    
Statement [LineItems]    
Common stock, shares issued 10,938,125 10,938,125
Common stock, shares outstanding 10,938,125 10,938,125
Common stock, no par value $ 0 $ 0