Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business Operations - Additional Information (Details)

v3.20.2
Organization and Description of Business Operations - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jul. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Retained Earnings (Accumulated Deficit)   $ (128,037,000)   $ (128,037,000)   $ (120,111,000)
Common Shares [Member]            
Shares Issued, Price Per Share $ 2.54 $ 2.05   $ 2.05    
Stock Issued During Period Shares Common Shares For At The Market Offering 2,008,989 1,303,282 997,957 1,303,282 1,088,226  
Stock Issued During Period Value Common Shares For At The Market Offering Gross $ 5,100,000     $ 2,700,000    
Stock Issued During Period Value Common Shares For At The Market Offering Net       $ 2,600,000