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Note - 4 Related Party Transactions (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Mar. 24, 2022
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2023
Mar. 06, 2023
Jan. 31, 2023
Dec. 31, 2022
Mar. 31, 2017
Amortization of Debt Discount (Premium)       $ 3,711,000 $ 955,000          
Interest Paid, Excluding Capitalized Interest, Operating Activities       140,000 120,000          
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     $ 7,278,000      
Debt Instrument, Interest Rate, Stated Percentage   22.00%   22.00%         22.00%  
Debt Instrument, Convertible, Conversion Price   $ 2.65   $ 2.65       $ 6.30 $ 6.30  
Share Price (in dollars per share)           $ 2.65   $ 2.87    
Debt Instrument, Unamortized Discount   $ 521,000   $ 521,000       $ 2,350,000 $ 1,223,000  
Amortization of Debt Discount (Premium)   258,000 $ 742,000 3,862,000 955,000          
Interest Paid, Excluding Capitalized Interest, Operating Activities   405,000 $ 552,000 794,000 $ 1,102,000          
Interest Payable   $ 516,000   $ 516,000         $ 1,492,000  
Revolving Credit Facility [Member] | Boyalife Asset Holding II [Member] | Incremental Value Increase [Member]                    
Debt Instrument, Unamortized Discount           $ 810,000