December 31, 2019
December 31, 2018
$
$
Deferred tax assets
Tax loss carryforwards
59,407
19,540
Temporary differences on capital and intangible assets
44,445
2,366
Stock-based compensation expense
11,324
6,427
Accruals and reserves
10,397
8,384
Share issuance costs
6,590
8,011
Temporary differences related to lease assets and liabilities
4,526
—
Investment tax credits
694
5,833
Valuation allowance
(89,363)
(46,343)
Total deferred tax assets
48,020
4,218
Deferred tax liabilities
Temporary differences on intangible assets
(35,967)
(5,350)
Other deferred tax liabilities
(1,374)
—
Total deferred tax liabilities
(37,341)
(5,350)
Net deferred tax assets (liabilities)
10,679
(1,132)
the significant components of the company ’ s deferred income tax assets and liabilities as of december 31 2019 and 2018 are as follows : .
in july 2019 the company formally established its emea headquarters in ireland and its asia-pacific headquarters in singapore .
as a result of these actions the company transferred regional relationship and territory rights from its canadian entity to enable each regional headquarters to develop and maintain merchant and commercial operations within its respective region while keeping the ownership of all of the company ' s current developed technology within canada .
these transfers reflect the growing proportion of the company ' s business occurring internationally and resulted in a one-time capital gain .
as a result of the capital gain ongoing operations the recognition of deferred tax assets and liabilities and the utilization of all applicable credits and other tax attributes including loss carryforwards the company has a provision for income taxes of $ 29027 in the year ended december 31 2019 .
during the year ended december 31 2019 the company released some of its valuation allowance against its deferred tax assets in canada the united states and sweden .
in the third quarter of 2019 the company released a portion of its valuation allowance against its canadian deferred tax assets as a result of the capital gain from the transfer of the regional relationship and territory rights .
in the united states as a result of the acquisition of 6rs the company released a portion of its valuation allowance during its fourth quarter against deferred tax assets on its united states net operating losses .
the company has provided for deferred income taxes for the estimated tax cost of distributable earnings of its subsidiaries of $ 292 .
the company had no material uncertain income tax positions for the years ended december 31 2019 and 2018 .
the company ' s accounting policy is to recognize interest and penalties related to uncertain tax positions as a component of income tax expense .
in the years ended december 31 2019 and 2018 there was no interest or penalties related to uncertain tax positions .
the company remains subject to audit by the relevant tax authorities for the years ended 2012 through 2019 .
investment tax credits which are earned as a result of qualifying r & d expenditures are recognized and applied to reduce income tax expense in the year in which the expenditures are made and their realization is reasonably assured .
as at december 31 2019 and 2018 the company had unused non-capital tax losses of approximately $ 209759 and $ 53941 respectively .
of the december 31 2019 balance $ 150707 of the non-capital tax losses do not expire while the remaining non-capital losses of $ 59052 are due to expire between 2033 and 2039 .
the company has u .
s .
state losses of $ 298998 as at december 31 2019 -december 31 2018 - $ 116026 .
there is no sr & ed expenditure pool balance as at december 31 2019 -december 31 2018 - $ 9575 .
in addition at december 31 2019 and 2018 the company had investment tax credits of $ 2111 and $ 4179 respectively .
the investment tax credits are due to expire between 2035 and 2039 .
expressed in us $ 000 ' s except share and per share amounts .

Question: What financial items does deferred tax assets comprise of?
Answer: Tax loss carryforwards Temporary differences on capital and intangible assets Stock-based compensation expense Accruals and reserves Share issuance costs Temporary differences related to lease assets and liabilities Investment tax credits Valuation allowance