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Income Taxes - Summary of Deferred Tax Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Deferred tax assets: |  |
NOLs – Foreign | $ 8,222 | $ 6,605
Goodwill and intangible assets | 1,794 | 1,841
Accrued expenses | 1,358 | 2,699
Stock-based compensation | 1,189 | 2,673
Net lease liability | 1,172 | 1,184
Capital losses | 794 | 794
NOLs – U.S. | 635 | 762
Other | 37 | 40
Deferred tax assets | 15,201 | 16,598
Deferred tax liabilities: |  |
Fixed assets and prepaid assets | 1,439 | 1,433
Unrealized gains | 748 | 724
Deferred tax liabilities | 2,187 | 2,157
Total deferred tax assets less deferred tax liabilities | 13,014 | 14,441
Less: valuation allowance | (9,016) | (7,399)
Deferred tax assets, net | $ 3,998 | $ 7,042

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