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Statement of Shareholders' Equity (Tables)
6 Months Ended
Jun. 30, 2024
Equity [Abstract]  
Schedule of Stock by Class [Table Text Block]
Preferred stock and convertible preferred stock consist of the following: 
 June 30, 2024December 31, 2023
Preferred stock, $0.001 par value; 5,000,000 shares authorized at June 30, 2024 and December 31, 2023; no shares issued and outstanding at June 30, 2024 and December 31, 2023
$— $— 
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at June 30, 2024 and December 31, 2023; 200 shares issued and outstanding at June 30, 2024 and December 31, 2023
$$