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Note 4 - Convertible Debentures (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended
Aug. 22, 2016
Aug. 03, 2016
Feb. 29, 2016
Mar. 31, 2017
Mar. 31, 2016
Stock Issued During Period, Shares, New Issues   600,000      
Amortization of Debt Discount (Premium)       $ 9,851 $ 5,189
Amortization of Debt Issuance Costs       $ 160 $ 785
Warrants Issued in Connection with Convertible Debentures [Member]          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     3,529,412    
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 8    
Warrant Expiration Period     5 years    
Number of Warrants, Percentage of Shares Issued or to Be Issued     80.00%    
Boyalife Investment Inc. [Member]          
Stock Issued During Period, Shares, New Issues     735,294    
Sale of Stock, Price Per Share     $ 3.40    
Stock Issued During Period, Value, New Issues     $ 2,500    
Debt Instrument, Face Amount     $ 12,500    
Convertible Debt [Member] | Boyalife Investment Inc. [Member]          
Debt Conversion, Original Debt Principal, Amount $ 12,500        
Debt Conversion, Original Debt Interest, Amount 8,250        
Additional Interest Expense, Debt 3,154        
Amortization of Debt Discount (Premium) 9,538        
Amortization of Debt Issuance Costs $ 155        
Convertible Debt [Member] | Boyalife Investment Inc. [Member] | Common Stock [Member]          
Debt Conversion, Convertible Shares     3,676,471    
Debt Conversion, Converted Instrument, Shares Issued 6,102,941        
Convertible Debt [Member] | Boyalife Investment Inc. [Member] | Common Stock [Member] | Conversion of Interest [Member]          
Debt Conversion, Converted Instrument, Shares Issued 2,426,470        
Debt Conversion, Converted Instrument, Amount $ 11,404        
Convertible Debt [Member] | Boyalife Investment Inc. [Member]          
Gross Proceeds from Financing Transaction     $ 15,000