Investments - Unrealized appreciation on investments (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Notes to Financial Statements
Gross unrealized appreciation of fixed maturities	$ 43,225	$ 14,205
Gross unrealized (depreciation) of fixed maturities	(346,891)	(2,122)
Net unrealized appreciation (depreciation) on investments	(303,666)	12,083
Deferred federal tax expense (benefit)	63,770	(4,108)
Net unrealized appreciation (depreciation), net of deferred income taxes	$ (239,896)	$ 7,975