Description Of Business And Significant Accounting Policies (Accounts Receivable) (Details) - USD ($)	Mar. 31, 2020	Mar. 27, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable - current	$ 372,000		$ 557,000
Revenue [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable - current	211,000		415,000
Tax [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable - current	130,000	$ 65,000	65,000
Accounts receivable - noncurrent	0		65,000
Joint Interest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable - current	$ 31,000		$ 77,000