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Common Shares - Equity Financings (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 12, 2021
Dec. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Subsidiary, Sale of Stock [Line Items]            
Proceeds from Issuance of Common Stock         $ 51 $ 1,062
Warrants Not Settleable in Cash, Fair Value Disclosure $ 2,074          
Capital Units [Member]            
Subsidiary, Sale of Stock [Line Items]            
Stock Issued During Period, Shares, New Issues 12,272,730          
Proceeds from Issuance of Common Stock $ 12,323          
Warrants Issued 7,408,101          
Class of Warrant or Right, Exercisable Term 36 months          
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right 1          
Exercise Price Of Warrants Or Rights $ 1.25          
Common Stock, Fair Value Disclosure $ 11,426          
At-The-Market Offering Agreement [Member] | H. C. Wainwright And Co., LLC [Member]            
Subsidiary, Sale of Stock [Line Items]            
Threshold of aggregate sales proceeds   $ 10,000        
Remaining Threshold Aggregate Sales Proceeds     $ 9,947   $ 9,947  
Stock Issued During Period, Shares, New Issues     50,000 392,470,000   798,270
Proceeds from Issuance of Common Stock     $ 51 $ 437   $ 871