Quarterly report pursuant to Section 13 or 15(d)

Related Party Agreements (Narrative) (Details)

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Related Party Agreements (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 04, 2022
Jan. 01, 2022
Jul. 22, 2016
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Related Party Transaction [Line Items]            
Common stock, shares issuable       27,393   2,536,607
Proceeds from debt issuance       $ 30,000 $ 0  
Runway Debt Facility            
Related Party Transaction [Line Items]            
Warrant term 10 years          
Proceeds from debt issuance $ 30,000          
At the Market Offering [Member]            
Related Party Transaction [Line Items]            
Proceeds from issuance of common shares       $ 2,800 $ 48,400  
Fortress Biotech, Inc [Member]            
Related Party Transaction [Line Items]            
Percentage of annual fees expense related to Management Services Agreement recorded in research and development expenses       50.00% 50.00%  
Percentage of annual fees expense related to Management Services Agreement recorded in general and administrative expenses       50.00% 50.00%  
Shares issued for services (in shares)   2,536,607   1,049,302    
Common stock, shares issuable       27,393    
Proceeds from issuance of common shares       $ 2,800    
Percentage of fully diluted equity   2.50% 2.50% 2.50%    
Expenses from related party transaction       $ 300 $ 100  
Fortress Biotech, Inc [Member] | Research and development [Member]            
Related Party Transaction [Line Items]            
Expenses from related party transaction           $ 4,200
Fortress Biotech, Inc [Member] | General and administrative [Member]            
Related Party Transaction [Line Items]            
Expenses from related party transaction       $ 800 $ 1,200