Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Taxes [Abstract]

Schedule of deferred tax assets and liabilities

	December 31,  2018			December 31,  2017
	US$ thousands			US$ thousands
Deferred tax assets:
Net operating loss carry forwards		39,976			35,044
Other		2,520			2,203
Total gross deferred tax assets		42,496			37,247
Less – valuation allowance		(40,825	)		(32,750	)
Net deferred tax assets		1,671			4,497
Deferred tax liabilities:
Property and equipment		8			9
Other		(269	)		50
Unproved oil and gas properties		(1,410	)		(4,556	)
Total gross deferred tax liabilities		(1,671	)		(4,497	)
Net deferred tax asset		—			—

Schedule of income tax reconciliation

	Year ended December 31, 2018			Year ended December 31, 2017			Year ended December 31, 2016
	US$  thousands			US$  thousands			US$ thousands
Pre-tax loss as reported		(38,511	)		(9,989	)		(8,515	)
U.S. statutory tax rate		21	%		34	%		34	%
Theoretical tax expense		(8,087	)		(3,396	)		(2,895	)
Increase in income tax expense resulting from:
Permanent differences		12			5			5
Change in tax rate		-			20,267			—
Other differences		-			4			—
Change in valuation allowance		8,075			(16,880	)		2,890
Income tax expense		—			—			—