Note 9 - Discounted Cash Flow Assumptions (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Minimum [Member]
Expected return	4.20%	4.30%
Maximum [Member]
Expected return	7.20%	7.30%
Time-to-liquidity (months)	2 years	2 years
Expected return	2.10%	2.90%