Pension and Profit Sharing - Pension Plan Assets by Fair Value Hierarchy (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Pension plan assets	$ 1,028,649	$ 1,013,831
Level 1
Pension plan assets	184,731
Level 2
Pension plan assets	843,918
Money Market Fund
Pension plan assets	16,794
Money Market Fund | Level 1
Pension plan assets	31
Money Market Fund | Level 2
Pension plan assets	16,763
Equity Common and Collected Funds
Pension plan assets	682,869
Equity Common and Collected Funds | Level 1
Pension plan assets	102,030
Equity Common and Collected Funds | Level 2
Pension plan assets	580,839
Fixed Income Common and Collected Funds
Pension plan assets	328,986
Fixed Income Common and Collected Funds | Level 1
Pension plan assets	82,670
Fixed Income Common and Collected Funds | Level 2
Pension plan assets	$ 246,316