Note 9 - Other Comprehensive Income (Loss) (Details) - Accumulated Other Comprehensive Income (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 12,704,319	$ 6,751,991
Other comprehensive income before reclassifications	3,241,605	4,604,321
Amounts reclassified from accumulated other comprehensive income	466	67,463
Net current period other comprehensive income (loss)	3,242,071	4,671,784
Ending balance	15,946,390	11,423,775
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	17,743,407	9,916,148
Other comprehensive income before reclassifications	3,241,605	4,604,321
Amounts reclassified from accumulated other comprehensive income	(125,302)	3,045
Net current period other comprehensive income (loss)	3,116,303	4,607,366
Ending balance	20,859,710	14,523,514
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(5,039,088)	(3,164,157)
Amounts reclassified from accumulated other comprehensive income	125,768	64,418
Net current period other comprehensive income (loss)	125,768	64,418
Ending balance	$ (4,913,320)	$ (3,099,739)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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