4. Investment Securities (Details 3) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value Less than 12 months	$ 3,064,237	$ 0	$ 18,391,284
Unrealized Loss Less than 12 months	15,674	0	96,349
Fair Value 12 months or more	0	997,447	0
Unrealized Loss 12 months or more	0	2,553	0
Fair Value	3,064,237	997,447	18,391,284
Unrealized Loss	15,674	2,553	96,349
Agency mortgage-backed securities (Agency MBS)
Fair Value Less than 12 months	3,064,237		10,664,484
Unrealized Loss Less than 12 months	15,674		69,637
Fair Value 12 months or more	0		0
Unrealized Loss 12 months or more	0		0
Fair Value	3,064,237		10,664,484
Unrealized Loss	15,674	0	69,637
Other investments
Fair Value Less than 12 months			1,483,427
Unrealized Loss Less than 12 months			4,573
Fair Value 12 months or more			0
Unrealized Loss 12 months or more			0
Fair Value			1,483,427
Unrealized Loss	0		4,573
U.S. GSE debt securities
Fair Value Less than 12 months		0	6,243,373
Unrealized Loss Less than 12 months		0	22,139
Fair Value 12 months or more		997,447	0
Unrealized Loss 12 months or more		2,553	0
Fair Value		997,447	6,243,373
Unrealized Loss	$ 0	$ 2,553	$ 22,139