Statement of Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Schedule of Stock by Class [Table Text Block]

Preferred stock and convertible preferred stock consist of the following: 

	March 31, 2023		December 31, 2022
Preferred stock, $0.001 par value; 5,000,000 shares authorized at March 31, 2023 and December 31, 2022; no shares issued and outstanding at March 31, 2023 and December 31, 2022	$	—	$	—
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at March 31, 2023 and December 31, 2022; 200 shares issued and outstanding at March 31, 2023 and December 31, 2022	$	1	$	1