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Defined Benefit Pension Plan - Projected benefit payments (Details)
Jun. 30, 2020
USD ($)
Defined Benefit Pension Plan  
2021 $ 3,787,700
2022 142,800
2023 540,600
2024 538,100
2025 1,498,900
2025-2029 4,077,300
Total $ 10,585,400