Investments - Securities in Unrealized Loss Position (Details)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
U.S. treasury securities
Fair value, less than 12 months	$ 9,218,906	$ 7,454,204
Fair value, 12 months or longer	0	0
Gross unrealized losses, less than 12 months	163,509	63,697
Gross unrealized losses, 12 months or longer	$ 0	$ 0
Number of securities in unrealized loss positions for less than 12 months	7	6
Number of securities in unrealized loss positions for 12 months or longer	0	0
Corporate securities
Fair value, less than 12 months	$ 29,825,023	$ 20,335,512
Fair value, 12 months or longer	0	0
Gross unrealized losses, less than 12 months	749,591	130,787
Gross unrealized losses, 12 months or longer	$ 0	$ 0
Number of securities in unrealized loss positions for less than 12 months	40	26
Number of securities in unrealized loss positions for 12 months or longer	0	0
Agency mortgage-backed securities
Fair value, less than 12 months	$ 20,766,633
Fair value, 12 months or longer	0
Gross unrealized losses, less than 12 months	537,533
Gross unrealized losses, 12 months or longer	$ 0
Number of securities in unrealized loss positions for less than 12 months	17
Number of securities in unrealized loss positions for 12 months or longer	0
Total fixed maturities
Fair value, less than 12 months	$ 59,810,562
Fair value, 12 months or longer	0
Gross unrealized losses, less than 12 months	1,450,633
Gross unrealized losses, 12 months or longer	$ 0
Number of securities in unrealized loss positions for less than 12 months	64
Number of securities in unrealized loss positions for 12 months or longer	0
Agency mortgage backed securities
Fair value, less than 12 months		$ 21,737,589
Fair value, 12 months or longer		0
Gross unrealized losses, less than 12 months		152,407
Gross unrealized losses, 12 months or longer		$ 0
Number of securities in unrealized loss positions for less than 12 months		17
Number of securities in unrealized loss positions for 12 months or longer		0
Total fixed maturities
Fair value, less than 12 months		$ 49,527,305
Fair value, 12 months or longer		0
Gross unrealized losses, less than 12 months		346,891
Gross unrealized losses, 12 months or longer		$ 0
Number of securities in unrealized loss positions for less than 12 months		49
Number of securities in unrealized loss positions for 12 months or longer		0