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Note 7 - Convertible Debentures (Details Textual) - USD ($)					1 Months Ended	6 Months Ended	12 Months Ended
	Mar. 28, 2018	Dec. 01, 2017	Aug. 22, 2016	Aug. 03, 2016	Feb. 29, 2016	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2017
Stock Issued During Period, Shares, New Issues	609,636	898,402		600,000
Stock Issued During Period, Value, New Issues						$ 2,368,000	$ 6,629,000	$ 2,092,000
Amortization of Debt Discount (Premium)							1,174,000	9,851,000
Amortization of Debt Issuance Costs								$ 160,000
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%
Common Stock [Member]
Stock Issued During Period, Shares, New Issues						898,402	8,084,637	600,000
Stock Issued During Period, Value, New Issues						$ 1,000	$ 8,000	$ 1,000
Convertible Debt [Member] \| Boyalife Investment Inc. [Member]
Debt Conversion, Original Debt Principal, Amount			$ 12,500,000
Debt Conversion, Original Debt Interest, Amount			8,250,000
Additional Interest Expense, Debt			3,153,000
Amortization of Debt Discount (Premium)			9,538,000
Amortization of Debt Issuance Costs			$ 155,000
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			$ 11,403,000
Boyalife Investment Inc. [Member]
Gross Proceeds from Financing Transaction					$ 15,000,000
Stock Issued During Period, Shares, New Issues					735,294
Sale of Stock, Price Per Share					$ 3.40
Stock Issued During Period, Value, New Issues					$ 2,500,000
Debt Instrument, Face Amount					$ 12,500,000