Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.21.1
Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]    
Change in valuation allowance $ 568,000 $ 2,326,000
Change in ownership limit, operating loss 207,000  
Pre change net operating loss carryforward 6,000,000  
Liability for uncertain tax positions 0  
Accrued interest and penalties 0  
State And Local Jurisdiction [Member]    
Operating Loss Carryforwards [Line Items]    
Net operating loss carryforwards 53,000,000  
State And Local Jurisdiction [Member] | Earliest Tax Year [Member]    
Operating Loss Carryforwards [Line Items]    
Tax years subject to examination   2006
Domestic Country [Member]    
Operating Loss Carryforwards [Line Items]    
Net operating loss carryforwards $ 53,000,000  
Domestic Country [Member] | Earliest Tax Year [Member]    
Operating Loss Carryforwards [Line Items]    
Tax years subject to examination   2006