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Shareholders Equity (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Balance, amount $ 22,494,000 $ 23,990,000 $ 23,502,000 $ 24,131,000
Stock option expense 32,000 72,000 104,000 287,000
Purchase of shares for cancellation, amount   (1,000)   (5,000)
Net loss (701,000) (53,000) (1,897,000) (405,000)
Issuance of shares - option exercises, amount     $ 83,000  
Issuance of shares - option exercises, shares     185,000  
Issuance of shares - ATM, net 104,000   $ 137,000  
Balance, amount 21,929,000 24,008,000 21,929,000 24,008,000
Common Stock        
Balance, amount $ 584,000 $ 581,000 $ 581,000 $ 581,000
Balance, shares 58,443,766,000 58,111,966,000 58,108,366,000 58,133,066,000
Stock option expense $ 0 $ 0 $ 0 $ 0
Purchase of shares for cancellation, shares   (3,600,000)   (24,700,000)
Purchase of shares for cancellation, amount   $ 0   $ 0
Net loss $ 0 0 $ 0 0
Issuance of shares - ATM, net, shares 190,000,000   340,400,000  
Issuance of shares - option exercises, amount     $ 2,000  
Issuance of shares - option exercises, shares     185,000,000  
Issuance of shares - ATM, net $ 2,000   $ 3,000  
Additional Paid-in Capital        
Balance, amount 70,699,000 70,415,000 70,514,000 70,204,000
Stock option expense 32,000 72,000 104,000 287,000
Purchase of shares for cancellation, amount   (1,000)   (5,000)
Net loss 0 0 0 0
Issuance of shares - option exercises, amount     81,000  
Issuance of shares - ATM, net 102,000   134,000  
Accumulated Deficit        
Balance, amount (48,789,000) (47,006,000) (47,593,000) (46,654,000)
Stock option expense 0 0 0 0
Purchase of shares for cancellation, amount   0   0
Net loss (701,000) $ (53,000) (1,897,000) $ (405,000)
Issuance of shares - option exercises, amount     0  
Issuance of shares - ATM, net $ 0   $ 0