XML 58 R43.htm IDEA: XBRL DOCUMENT v3.21.1
Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2020
Stockholders' Equity Attributable to Parent [Abstract]  
Schedule of Stock by Class [Table Text Block]
Shares Outstanding

Changes in the number of shares outstanding are as follows:
 Preferred Stock,
Series B
Common Stock,
Class A
Common Stock,
Class B
Balance at December 31, 2018104,574 8,031,307 1,406,082 
Stock-based compensation - vested share grant— 20,000 — 
Stock-based compensation - options exercised— 7,500 — 
Conversion of common stock from Class B to Class A— 288,620 (288,620)
Balance at December 31, 2019
104,574 8,347,427 1,117,462 
Issuance under public offering  2,537,500  
Stock-based compensation - options exercised 107,000  
Conversion of common stock from Class B to Class A— 398,262 (398,262)
Purchase under tender offer(62,854)—  
Balance at December 31, 202041,720 11,390,189 719,200 
Refer to Note 21, Subsequent Events, for information related to share activity subsequent to December 31, 2020.