Note 5 - Acquisition of EGEN, Inc. - Fair Values of Acquired Assets and Liabilities (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Goodwill	$ 1,976,101	$ 1,976,101
EGEN Inc [Member]
Property and equipment, net	35,000
In-process research and development	24,211,000
Other Intangible assets (Covenant not to compete)	1,591,000
Goodwill	1,976,000
Total assets:	27,813,000
Accounts payable and accrued liabilities	(235,000)
Net assets acquired	$ 27,578,000