XML 61 R47.htm IDEA: XBRL DOCUMENT v3.21.1
Property, Plant, and Equipment - Additional Information (Details) - USD ($)
12 Months Ended
Jul. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Property Plant And Equipment [Abstract]      
Exercised option to purchase $ 460,300    
Depreciation expense   $ 167,000 $ 212,000