Employee Benefits and Retirement Plans - Amount Recognized in Consolidated Balance Sheet (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Accrued Pension	$ 2,112,848	$ 2,072,247	$ 2,575,414
Deferred tax assets	443,698	435,172	875,641
Accumulated other comprehensive income	1,669,150	1,637,075	1,699,773
Total	2,112,848	2,072,247	2,575,414
Service cost	0	0	0
Interest cost on benefit obligation	657,845	712,228	764,323
Expected return on plan assets	(721,735)	(716,622)	(775,423)
Other - net	482,679	587,821	657,260
Net periodic pension cost	418,789	583,427	646,160
Partial recognition of loss due to settlement	0	0	426,599
Total	$ 418,789	$ 583,427	$ 1,072,759