Description Of Business And Significant Accounting Policies (Schedule Of Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable	$ 877	$ 1,285
Allowance for doubtful accounts	(14)	(14)
Revenue [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable	845	1,179
Joint Interest [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable	24	35
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
accounts receivable	$ 22	$ 85