CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parentheticals) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Taxes on unrealized appreciation (depreciation) on available-for-sale securities	$ (467,102)	$ 582,945	$ (168,180)	$ 1,046,929
Taxes on reclassification adjustment for realized gains included in net income	$ 26,813	$ 20,987	$ 72,106	$ 54,938