3. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 8,396	$ 10,139	$ 16,076	$ 23,902
Total financial assets	8,396	10,139
Liabilities
Accounts payable and other accrued liabilities	498	1,098
Asset retirement obligation	366	366
Total financial assets and liabilities	9,260	11,603
Level 1
Assets
Cash and cash equivalents	8,396	10,139
Total financial assets	8,396	10,139
Liabilities
Accounts payable and other accrued liabilities	498	1,098
Asset retirement obligation	0	0
Total financial assets and liabilities	8,894	11,237
Level 2
Assets
Cash and cash equivalents	0	0
Total financial assets	0	0
Liabilities
Accounts payable and other accrued liabilities	0	0
Asset retirement obligation	366	366
Total financial assets and liabilities	$ 366	$ 366