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Note - 4 Related Party Transactions (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 28, 2023
Mar. 24, 2022
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Jul. 31, 2023
Mar. 31, 2023
Mar. 06, 2023
Jan. 31, 2023
Dec. 31, 2022
Mar. 31, 2017
Amortization of Debt Discount (Premium)         $ 5,396,000 $ 1,897,000            
Interest Paid, Excluding Capitalized Interest, Operating Activities         $ 140,000 180,000            
ImmuneCyte [Member]                        
Percent of Ownership Interest Transferred   8.64%                    
Royalty, Percent of Annual Net Sales, US Patents   7.50%                    
Royalty, Percent of Annual Net Sales, Other Licensed Intellectual Property   5.00%                    
Revolving Credit Facility [Member] | Boyalife Asset Holding II [Member]                        
Line of Credit Facility, Maximum Borrowing Capacity                       $ 10,000,000
Long-Term Line of Credit $ 7,278,000               $ 7,278,000      
Debt Conversion, Original Debt, Amount $ 700,000                      
Debt Conversion, Converted Instrument, Shares Issued 654,206                      
Debt Instrument, Convertible, Conversion Price $ 1.07   $ 1.07   $ 1.07   $ 1.07 $ 2.65   $ 6.30 $ 6.30  
Interest Payable $ 216,000   $ 225,000   $ 225,000           $ 1,492,000  
Debt Instrument, Interest Rate, Stated Percentage     22.00%   22.00%           22.00%  
Share Price (in dollars per share)               $ 2.65   $ 2.87    
Debt Instrument, Unamortized Discount     $ 2,461,000   $ 2,461,000         $ 2,350,000 $ 1,223,000  
Amortization of Debt Discount (Premium)     1,720,000 $ 940,000 5,582,000 1,897,000            
Interest Paid, Excluding Capitalized Interest, Operating Activities     $ 409,000 $ 394,000 $ 1,203,000 $ 1,496,000            
Revolving Credit Facility [Member] | Boyalife Asset Holding II [Member] | Incremental Value Increase [Member]                        
Debt Instrument, Unamortized Discount             $ 3,660,000 $ 810,000