3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 3,881	$ 10,139	$ 23,902
Total financial assets	3,881	10,139
Liabilities
Accounts payable and other accrued liabilities	909	1,098
Asset retirement obligation	357	366	$ 415
Total financial assets and liabilities	5,147	11,603
Level 1
Assets
Cash and cash equivalents	3,881	10,139
Total financial assets	3,881	10,139
Liabilities
Accounts payable and other accrued liabilities	$ 909	$ 1,098
Asset retirement obligation
Total financial assets and liabilities	$ 4,790	$ 11,237
Level 2
Assets
Cash and cash equivalents
Total financial assets
Liabilities
Accounts payable and other accrued liabilities
Asset retirement obligation	$ 357	$ 366
Total financial assets and liabilities	$ 357	$ 366