Investments - Available for sale investments (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Certificates of deposit
Amortized cost	$ 7,794,000	$ 10,090,000
Gross unrealized gains	0
Gross unrealized losses	0
Estimated fair value	7,794,000	10,090,000
U.S. treasury securities
Amortized cost	16,100,139	23,354,211
Gross unrealized gains	37,614	183,791
Gross unrealized losses	0	0
Estimated fair value	16,137,753	23,538,002
Total fixed maturities
Amortized cost	23,894,139	33,444,211
Gross unrealized gains	37,614	183,791
Gross unrealized losses	0	0
Estimated fair value	$ 23,931,753	$ 33,628,002