Fair Value of Financial Instruments - Fair Value of Invested Assets (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Fixed maturity investments available for sale:
U.S. treasury securities	$ 9,519,063	$ 19,103,925
Corporate securities	22,995,709	0
Agency mortgage-backed securities	15,928,123	0
Certificates of deposit	35,826,000	61,280,000
Total fixed maturities	84,268,895	80,383,925
Short-term investments, at fair value	13,080,515	10,204,603
Total financial instruments at fair value	97,349,410	90,588,528
Level 1
Fixed maturity investments available for sale:
U.S. treasury securities	9,519,063	19,103,925
Corporate securities	0	0
Agency mortgage-backed securities	0	0
Certificates of deposit	0	0
Total fixed maturities	9,519,063	19,103,925
Short-term investments, at fair value	12,080,638	10,204,603
Total financial instruments at fair value	21,599,701	29,308,528
Level 2
Fixed maturity investments available for sale:
U.S. treasury securities	0	0
Corporate securities	22,995,709	0
Agency mortgage-backed securities	15,928,123	0
Certificates of deposit	35,826,000	61,280,000
Total fixed maturities	74,749,832	61,280,000
Short-term investments, at fair value	999,877	0
Total financial instruments at fair value	75,749,709	61,280,000
Level 3
Fixed maturity investments available for sale:
U.S. treasury securities	0	0
Corporate securities	0	0
Agency mortgage-backed securities	0	0
Certificates of deposit	0	0
Total fixed maturities	0	0
Short-term investments, at fair value	0	0
Total financial instruments at fair value	$ 0	$ 0