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Income Taxes - Summary of Deferred Tax Assets (Detail) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Deferred tax assets: |  |
NOLs – International | $ 8,992 | $ 6,605
Goodwill and intangible assets | 1,746 | 1,841
Accrued expenses | 1,837 | 2,699
Stock-based compensation | 1,189 | 2,673
Net lease liability | 1,160 | 1,184
Capital losses | 794 | 794
NOLs – U.S. | 635 | 762
Other | 272 | 40
Deferred tax assets | 16,625 | 16,598
Deferred tax liabilities: |  |
Fixed assets and prepaid assets | 1,480 | 1,433
Unrealized gains | 760 | 724
Deferred tax liabilities | 2,240 | 2,157
Total deferred tax assets less deferred tax liabilities | 14,385 | 14,441
Less: valuation allowance | (9,786) | (7,399)
Deferred tax assets, net | $ 4,599 | $ 7,042

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