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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2024
Equity, Attributable to Parent [Abstract]  
Schedule of Stock by Class [Table Text Block]
Changes in the number of shares outstanding are as follows:
 Common Stock,
Class A		Common Stock,
Class B
Balance at December 31, 2021
13,649,933 719,200 
Issuance under public offering99,090 — 
Common stock issued for options exercised98,000 — 
Issuance of previously vested restricted stock units1,172 — 
Notional stock units paid in shares71,451 — 
Balance at December 31, 2022
13,919,646 719,200 
Issuance under public offering722,568 — 
Issuance of previously vested restricted stock units45,437 — 
Notional stock units paid in shares119,604 — 
Exercise of outstanding warrant
149,179 — 
Balance at December 31, 2023
14,956,434 719,200 
Issuance under public offering 933,987 — 
Common stock issued for options exercised96,000 — 
Issuance of previously vested restricted stock units45,311 — 
Notional stock units paid in shares14,184 — 
Balance at December 31, 2024
16,045,916 719,200