Note 5 - Receivables, Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	December 31, 2014		December 31, 2013
	(in thousands)
Commodity sales	$	1,473	$	2,303
Accounts receivable - joint venture		-		12,230
Other		449		7,097
Accounts receivable	$	1,922	$	21,630

Schedule of Value-added Taxes Receivable [Table Text Block]

	December 31, 2014			December 31, 2013
	(in thousands)
Value-added tax receivable as of the beginning of the period	$	12,262		$	21,784
IGV accrued related to expenditures during period		13,943			12,722
IGV reduced related to sale of oil during period		(21,712	)		(22,244	)
Value-added tax receivable as of the end of the period	$	4,493		$	12,262
Current portion of value-added tax receivable as of the end of the period	$	2,343		$	10,490
Long-term portion of value-added tax receivable as of the end of the period	$	2,150		$	1,772

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	December 31, 2014		December 31, 2013
	(in thousands)
Accounts payable - joint venture	$	2,947	$	-
Other accounts payable		1,433		3,127
Accounts payable	$	4,380	$	3,127