Consolidated Statements of Shareholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2015	$ 3,699	$ 43,002,670	$ 33,062,282	$ (1,183,552)	$ 2,102,403	$ 76,987,502
Common stock issued during year	21	307,866	0	0	0	307,887
Treasury shares acquired	(370)	(5,431,824)	0	0	0	(5,432,194)
Net income attributable to common shareholders	0	0	1,168,025	0	0	1,168,025
Unrealized holding gain (loss) on securities net of noncontrolling interest and reclassification adjustment and taxes	0	0	0	21,537,244	0	21,537,244
Contributions	0	0	0	0	83,696	83,696
Distributions	0	0	0	0	(638,578)	(638,578)
Gain attributable to noncontrolling interest	0	0	0	0	288,260	288,260
Balance at Dec. 31, 2016	3,350	37,878,712	34,230,307	20,353,692	1,835,781	94,301,842
Common stock issued during year	13	261,474	0	0	0	261,487
Treasury shares acquired	(30)	(604,022)	0	0	0	(604,052)
Net income attributable to common shareholders	0	0	4,810,149	0	0	4,810,149
Unrealized holding gain (loss) on securities net of noncontrolling interest and reclassification adjustment and taxes	0	0	0	12,598,646	0	12,598,646
Contributions	0	0	0	0	0	0
Distributions	0	0	0	0	(939,537)	(939,537)
Gain attributable to noncontrolling interest	0	0	0	0	2,983	2,983
Balance at Dec. 31, 2017	$ 3,333	$ 37,536,164	$ 39,040,456	$ 32,952,338	$ 899,227	$ 110,431,518