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Income Taxes - Summary of Deferred Tax Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred tax assets: |  |
NOLs - Foreign | $ 4,347 | $ 3,841
Stock-based compensation | 1,655 | 1,474
Deferred rent liability | 1,245 | 1,257
NOLs - U.S. | 779 | 909
Accrued expenses | 769 | 526
Other | 255 | 488
Deferred tax assets | 9,050 | 8,495
Deferred tax liabilities: |  |
Unrealized gains | 1,716 | 1,718
Fixed assets | 1,498 | 1,498
Goodwill and intangible assets | 436 | 388
Deferred tax liabilities | 3,650 | 3,604
Total deferred tax assets less deferred tax liabilities | 5,400 | 4,891
Less: valuation allowance | (4,347) | (3,841)
Deferred tax assets, net | $ 1,053 | $ 1,050

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