Note 7 - Gross Realized Losses on Equity and Debt Securities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Equity Securities [Member]
Gross realized gains	$ 36,000	$ 204,000	$ 417,000	$ 630,000
Gross realized losses	0	(23,000)		(23,000)
Other-than-temporary impairment losses	(122,000)	0	(192,000)
Net gains	(86,000)	181,000	225,000	607,000
Total recognized OTTI credit loss	(122,000)	0	(192,000)
Debt Securities [Member]
Gross realized gains	101,000	66,000	182,000	154,000
Gross realized losses		(33,000)	(73,000)	(44,000)
Other-than-temporary impairment losses	0	0
Net gains	101,000	33,000	109,000	110,000
Total recognized OTTI credit loss	0	0
Gross realized gains	137,000	270,000	599,000	784,000
Gross realized losses		(56,000)	(73,000)	(67,000)
Other-than-temporary impairment losses	(122,000)	0	(192,000)
Net gains	15,000	214,000	334,000	717,000
Total recognized OTTI credit loss	$ (122,000)	$ 0	$ (192,000)