Investments - Available for sale investments (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Certificates of deposit
Amortized cost	$ 10,091,000	$ 10,090,000
Estimated fair value	10,091,000	10,090,000
U.S. treasury securities
Amortized cost	16,099,228	23,354,211
Gross unrealized gains	111,364	183,791
Gross unrealized losses	0	0
Estimated fair value	16,210,592	23,538,002
Total fixed maturities
Amortized cost	26,190,228	33,444,211
Gross unrealized gains	111,364	183,791
Gross unrealized losses	0	0
Estimated fair value	$ 26,301,592	$ 33,628,002