Note 11 - Grant Funding (Details Textual) - USD ($)	1 Months Ended	3 Months Ended	10 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Mar. 31, 2017
Deferred Revenue from Grants, Current		$ 304,000	$ 285,000
Grant Agreement [Member] | TEDCO [Member]
Grant Funding Available	$ 750,000
Grant Funding, Term of Grant	3 years
Proceeds from Grant Funding		$ 312,000
Research and Development Expense Reduction from Qualified Grant Funding			27,000
Deferred Revenue from Grants, Current			$ 285,000