Related Party Transactions (Narrative) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Dec. 18, 2007	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Methane gas revenue		$ 0	$ 0	$ 0	$ 0
Working interest percent	15.00%
Bond, face value		0		0
Related party allowance for doubtful accounts receivable		14,000		14,000		$ 14,000
Accounts receivable - related parties balance
Methane Project [Member]
Related Party Transaction [Line Items]
Percent of net profits, interest				7.50%
Hoactzin Partners, L.P. [Member]
Related Party Transaction [Line Items]
Related parties accounts payable		159,000		$ 159,000		159,000
Past due related parties accounts payable		159,000		159,000
Hoactzin Partners, L.P. [Member] | Methane Project [Member]
Related Party Transaction [Line Items]
Methane gas revenue				0
Net profits				0
Related Party [Member]
Related Party Transaction [Line Items]
Related party allowance for doubtful accounts receivable		159,000		159,000		159,000
Related Party [Member] | Hoactzin Partners, L.P. [Member]
Related Party Transaction [Line Items]
Accounts receivable-related party, allowance for doubtful accounts		159,000		159,000		159,000
Accounts receivable - related parties balance		$ 159		$ 159		$ 0