	Year Ended December 31,
	2020		2019
U.S.	$	12,362	$	7,980
Non-U.S.		1,768		1,801
	$	14,130	$	9,781

A reconciliation of the income tax provision computed at statutory rates to the reported income tax provision is as follows (amounts in thousands):

	Year Ended December 31,
	2020			2019
Statutory tax rate		21.00	%		21.00	%
Net loss before income taxes	$	14,130		$	9,781
Expected income tax recovery	$	(2,967	)	$	(2,054	)
Increase (decrease) in income tax recovery resulting from:
Derivative liability		(1	)		(2,964	)
Share based payments		415			949
Other permanent difference		(21	)		(213	)
Foreign income taxed at foreign rate		(97	)		(99	)
Increase in valuation allowance		2,671			4,381
Income tax expense	$	—		$	—

The significant components of the Company’s deferred income tax assets and liabilities after applying enacted corporate tax rates are as follows (amounts in thousands):

	As of December 31,
	2020			2019
Deferred income tax assets (liabilities)
Operating losses carried forward	$	24,576		$	21,318
Tax credits		882			679
Stock compensation		1,616			1,496
Other		1,099			1,293
Valuation allowance		(28,173	)		(24,786	)
Net deferred income tax asset	$	—		$	—

As of December 31, 2020, the Company has accumulated non-capital losses totaling $5.2 million in Canada and net operating losses of $85.9 million in the United States, which may be available to carry forward and offset future years’ taxable income. The losses expire in various amounts starting in 2033.

Under the provisions of the Internal Revenue Code of 1986, as amended (the “Code”), the net operating loss carryforwards are subject to review and possible adjustment by the Internal Revenue Service and state tax authorities. Net operating loss carryforwards may become subject to an annual limitation in the event of certain cumulative changes in the ownership interest of significant shareholders over a three-year period in excess of 50 percent, as defined under Section 382 of the Code, as well as similar state provisions. This could limit the amount of tax attributes that can be utilized annually to offset future taxable income or tax liabilities. The amount of the annual limitation is determined based on the value of the Company immediately prior to the ownership change. Subsequent ownership changes may further affect the limitation in future years.

The Company has adopted certain provisions of ASC 740, “Income Taxes”, which prescribes a recognition threshold and measurement attribute for the recognition and measurement of tax positions taken or expected to be taken in income tax returns. The provisions also provide guidance on the de-recognition of income tax assets and liabilities, classification of current and deferred income tax assets and liabilities, and accounting for interest and penalties associated with tax positions.

The Company files income tax returns in the U.S. federal jurisdiction, and in various state and foreign jurisdictions. The Company’s tax returns are subject to tax examinations by U.S. federal and state tax authorities, or examinations by foreign tax authorities until the expiration of the respective statutes of limitation. The Company currently has no tax years under examination.

As of December 31, 2020, the Company does not have an accrual relating to uncertain tax positions. It is not anticipated that unrecognized tax benefits would significantly increase or decrease within 12 months of the reporting date.