Securities Available for Sale - Summary of Range of Losses (Details)	9 Months Ended
	Sep. 30, 2017 USD ($) Security
Number of Individual Securities | Security	10
Fair Value	$ 67,980,730
Unrealized Loss	$ (5,251,951)
Securities Group One [Member]
Number of Individual Securities | Security	8
Fair Value	$ 52,273,480
Unrealized Loss	$ (1,364,570)
Securities Group One [Member] | Minimum [Member]
Range of Loss	0.00%
Securities Group One [Member] | Maximum [Member]
Range of Loss	4.00%
Securities Group Two [Member]
Number of Individual Securities | Security	1
Fair Value	$ 3,332,000
Unrealized Loss	$ (302,882)
Range of Loss	8.00%
Securities Group Three [Member]
Number of Individual Securities | Security	1
Fair Value	$ 12,375,250
Unrealized Loss	$ (3,584,499)
Range of Loss	22.00%