XML 101 R88.htm IDEA: XBRL DOCUMENT v3.22.4
Note 15 - Litigation Settlement (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
Jun. 10, 2022
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Sep. 30, 2022
Mar. 31, 2022
Litigation Settlement, Expense     $ (233,000) $ 0    
Series E Preferred Stock in Biostage [Member]            
Stock Issued During Period, Value, Issued for Settlement     3,900,000      
Equity Securities without Readily Determinable Fair Value, Amount $ 3,900,000          
Preferred Stock, Book Value, Inclusive of Accrued Dividends     $ 4,100,000      
Convertible Preferred Stock [Member] | Biostage [Member]            
Preferred Stock, Dividend Rate, Percentage     8.00%      
Preferred Stock, Par or Stated Value Per Share (in dollars per share)     $ 1,000      
Preferred Stock, Mandatory Conversion, Minimum Qualified Offering Amount     $ 4,000,000      
Case in Suffolk Superior Court [Member]            
Loss Contingency, Estimate of Possible Loss           $ 5,200,000
Legal Fees       $ 300,000    
Litigation Settlement, Expense   $ (4,900,000)        
Case in Suffolk Superior Court [Member] | Convertible Preferred Stock [Member]            
Estimated Litigation Liability         $ 500,000  
Stock Issued During Period, Shares, Issued For Settlement (in shares) 4,000          
Stock Issued During Period, Value, Issued for Settlement $ 4,000,000.0