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Net Loss Per Share (Tables)
12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Anti-dilutive common share equivalents excluded from the computation of diluted net loss per share were as follows:
December 31,
 20202019
Preferred shares9,355,778 8,443,778 
Common share purchase warrants2,786,534 205,562 
Restricted stock not yet vested or released— 20,798 
Options outstanding101,175 2,600