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Note 4 - Related Party Transactions (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Aug. 21, 2017
Jun. 30, 2017
Mar. 06, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
May 18, 2018
Apr. 16, 2018
Dec. 31, 2017
Units Issued, Price per Unit               $ 0.60    
Interest Expense, Total       $ 383,000 $ 112,000 $ 743,000 $ 131,000      
Boyalife Investment Fund II, Inc. [Member] | Convertible Debt [Member]                    
Debt Instrument, Convertible, Conversion Price               $ 0.60 $ 1.61  
Boyalife Investment Fund II, Inc. [Member] | Revolving Credit Facility [Member]                    
Line of Credit Facility, Maximum Borrowing Capacity       10,000,000   10,000,000        
Proceeds from Long-term Lines of Credit           7,200,000        
Debt Instrument, Interest Rate, Stated Percentage     22.00%              
Debt Instrument, Convertible, Percentage of Conversion Price     90.00%              
Debt Instrument, Number of Trading Days Prior to the Maturity Date     10 days              
Interest Payable       742,000   742,000     $ 657,000 $ 657,000
Interest Expense, Total   $ 122,000   382,000 103,000 742,000        
Boyalife W.S.N. [Member]                    
Distributor Agreement Term 3 years                  
Distributor Agreement, Renewal Term 2 years                  
Boyalife Group Ltd. [Member]                    
Revenue from Related Parties       $ 43,000 $ 0 269,000 $ 0      
Boyalife Group Ltd. [Member] | Legal Expenses Reimbursement [Member]                    
Related Party Transaction, Amounts of Transaction           $ 606,000