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Fair Value (Details 3) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Assets held for sale $ 520,000 $ 520,000
Fair Value Inputs Level 1    
Assets held for sale 0 0
Fair Value Inputs Level 2    
Assets held for sale 520,000 520,000
Fair Value Inputs Level 3    
Assets held for sale $ 0 $ 0