Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details)

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Employee Benefit Plans (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2020
Employee Benefit Plans    
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 37,000  
Defined Benefit Plan Contributions by Employer Accrued   $ 26,000