Employee Benefits and Retirement Plans - Pension Asset Allocation and Fair Value Measurement (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity	$ 0	$ 3,482,765
Equity, percentage	0.00%	36.00%
Fixed income	$ 0	$ 1,096,033
Fixed income, percentage	0.00%	11.00%
Total	$ 0	$ 4,578,798
Total, percentage	0.00%	47.00%
Certificates of deposit	$ 4,967,299	$ 4,521,110
Certificates of deposits, percentage	48.00%	47.00%
Cash and cash equivalent	$ 5,345,178	$ 579,846
Cash and cash equivalents, percentage	52.00%	6.00%
Total	$ 10,312,477	$ 5,100,956
Total, percentage	100.00%	53.00%
Fair value of plan assets	$ 10,312,477	$ 9,679,754	$ 10,672,811	$ 10,574,145
Fair value of plan assets, percentage	100.00%	100.00%
Level 1 [Member]
Equity	$ 0	$ 3,482,765
Fixed income	0	1,096,033
Total	0	4,578,798
Certificates of deposit	4,967,299	4,521,110
Cash and cash equivalent	5,345,178	579,846
Total	10,312,477	5,100,956
Fair value of plan assets	$ 10,312,477	$ 9,679,754