Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	Total
Adoption of Accounting Standards Update No 2016-01 (Note 2) | ASU 2016-01 [Member]	$ 0	$ 0	$ 18,277,328	$ (18,277,328)	$ 0	$ 0
Balance at March 31, 2018	3,333	37,536,164	39,040,456	32,952,338	899,227	110,431,518
Balance at Dec. 31, 2017	3,333	37,536,164	39,040,456	32,952,338	899,227	110,431,518
Balance at Dec. 31, 2017	3,333	37,536,164	57,317,784	14,675,010	899,227	110,431,518
Common stock issued during year	9	229,991	0	0	0	230,000
Treasury shares acquired	(24)	(600,216)	0	0	0	(600,240)
Net income attributable to common shareholders	0	0	2,657,245	0	0	2,657,245
Unrealized holding income on securities net of noncontrolling interest and reclassification adjustment and taxes	0	0	0	(3,385,389)	0	(3,385,389)
Contributions	0	0	0	0	0	0
Distributions	0	0	0	0	(146)	(146)
Gain attributable to noncontrolling interest	0	0	0	0	29,500	29,500
Balance at March 31, 2018	3,333	37,536,164	39,040,456	32,952,338	899,227	110,431,518
Balance at March 31, 2018	3,318	37,165,939	59,975,029	11,289,621	928,581	109,362,488
Balance at March 31, 2018	3,296	36,567,865	69,708,901	62,495	734,153	107,076,710	[1]
Balance at Dec. 31, 2018	3,296	36,567,865	69,708,901	62,495	734,153	107,076,710	[1]
Common stock issued during year	8	229,792	0	0	0	229,800
Treasury shares acquired	(7)	(212,380)	0	0	0	(212,387)
Net income attributable to common shareholders	0	0	11,644,879	0	0	11,644,879
Unrealized holding income on securities net of noncontrolling interest and reclassification adjustment and taxes	0	0	0	3,886,639	0	3,886,639
Contributions	0	0	0	0	0	0
Distributions	0	0	0	0	(245,750)	(245,750)
Gain attributable to noncontrolling interest	0	0	0	0	153,733	153,733
Balance at March 31, 2018	3,296	36,567,865	69,708,901	62,495	734,153	107,076,710	[1]
Balance at March 31, 2018	$ 3,297	$ 36,585,277	$ 81,353,780	$ 3,949,134	$ 642,136	$ 122,533,624

[1] Balance sheet audited at December 31, 2017.