XML 61 R90.htm IDEA: XBRL DOCUMENT v3.20.1
Pension Plan (Details) - Expected projected benefit payments due
Dec. 31, 2019
USD ($)
Pension Plan (Details) - Expected projected benefit payments due [Line Items]  
2020 $ 720,000
2021 1,229,000
2022 731,000
2023 865,000
2024 $ 956,000