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Balance Sheet Details (Accounts Payable and Accrued Liabilities) (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Balance Sheet Details [Abstract]    
Accounts payable $ 547,000 $ 415,000
Other accrued expenses 731,000 121,000
Accounts Payable and Accrued Liabilities, Current, Total $ 1,278,000 $ 536,000