Investments - Securities in Unrealized Loss Position (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
U.S. treasury securities
Fair value, less than 12 months	$ 7,454,225	$ 0
Fair value, 12 months or longer	0	9,097,285
Gross unrealized losses, less than 12 months	63,697	0
Gross unrealized losses, 12 months or longer	0	2,122
Corporate securities
Fair value, less than 12 months	20,335,512
Fair value, 12 months or longer	0
Gross unrealized losses, less than 12 months	130,787
Gross unrealized losses, 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
Total fixed maturities
Fair value, less than 12 months	49,527,326
Fair value, 12 months or longer	0
Gross unrealized losses, less than 12 months	346,891
Gross unrealized losses, 12 months or longer	$ 0
Total fixed maturities
Fair value, less than 12 months		0
Fair value, 12 months or longer		9,097,285
Gross unrealized losses, less than 12 months		0
Gross unrealized losses, 12 months or longer		$ 2,122