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Pension and Profit Sharing - Pension Plan Assets by Fair Value Hiearchy (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Pension plan assets | $ 1,013,081 | $ 1,249,825 | $ 1,294,727
Money Market Fund |  |  |
Pension plan assets | 17,324 | 10,774 |
Equity Common and Collected Funds |  |  |
Pension plan assets | 663,957 | 836,594 |
Fixed Income Common and Collected Funds |  |  |
Pension plan assets | 332,520 | 402,431 |
Level 1 |  |  |
Pension plan assets | 182,831 | 225,881 |
Level 1 | Money Market Fund |  |  |
Pension plan assets | 4 |  |
Level 1 | Equity Common and Collected Funds |  |  |
Pension plan assets | 99,616 | 125,451 |
Level 1 | Fixed Income Common and Collected Funds |  |  |
Pension plan assets | 83,211 | 100,430 |
Level 2 |  |  |
Pension plan assets | 830,970 | 1,023,918 |
Level 2 | Money Market Fund |  |  |
Pension plan assets | 17,320 | 10,774 |
Level 2 | Equity Common and Collected Funds |  |  |
Pension plan assets | 564,341 | 711,143 |
Level 2 | Fixed Income Common and Collected Funds |  |  |
Pension plan assets | 249,309 | 302,001 |
Level 3 |  |  |
Pension plan assets | $ 0 | $ 0 |

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