Investments - Securities in Unrealized Loss Position (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
U.S. treasury securities
Fair value, less than 12 months	$ 9,519,063	$ 0
Fair value, 12 months or longer	0	9,097,285
Gross unrealized losses, less than 12 months	9,395	0
Gross unrealized losses, 12 months or longer	0	2,122
Corporate securities
Fair value, less than 12 months	9,731,038
Fair value, 12 months or longer	0
Gross unrealized losses, less than 12 months	36,981
Gross unrealized losses, 12 months or longer	0
Agency mortgage-backed securities
Fair value, less than 12 months	12,973,738
Fair value, 12 months or longer	0
Gross unrealized losses, less than 12 months	17,143
Gross unrealized losses, 12 months or longer	0
Total fixed maturities
Fair value, less than 12 months	32,223,839	0
Fair value, 12 months or longer	0	9,097,285
Gross unrealized losses, less than 12 months	63,519	0
Gross unrealized losses, 12 months or longer	$ 0	$ 2,122