Note 3 - Comprehensive Income and Accumulated Other Comprehensive Income (Details) - Changes in Accumulated Other Comprehensive Income (AOCI) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 3,168,482	$ 103,000
Other comprehensive income (loss) before reclassifications	1,238,000	1,459,000
Amounts reclassified from AOCI	(185,000)	(8,000)
Net current period other comprehensive income (loss)	1,052,977	1,450,536
Balance	4,221,459	1,554,000
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	3,422,000	125,000
Other comprehensive income (loss) before reclassifications	1,303,000	1,527,000
Amounts reclassified from AOCI	(185,000)	(8,000)
Net current period other comprehensive income (loss)	1,118,000	1,519,000
Balance	4,540,000	1,644,000
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(254,000)	(22,000)
Other comprehensive income (loss) before reclassifications	(65,000)	(68,000)
Net current period other comprehensive income (loss)	(65,000)	(68,000)
Balance	$ (319,000)	$ (90,000)