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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
NOL carryforwards | $ 15,756 | $ 15,337
UK NOL carryforwards | 534 | 567
Allowance for doubtful accounts | 97 | 119
Compensation and vacation accrual | 58 | 64
Operating accruals | 285 | 47
Research and experimentation, AMT and foreign tax credits | 126 | 148
Texas margin tax credit | 120 | 136
Other | 850 | 514
Total gross deferred tax assets | 17,826 | 16,932
Valuation allowance | (17,149) | (16,340)
Net deferred tax assets | 677 | 592
Capitalized software | 523 | 375
Fixed assets and intangibles | 86 | 220
Foreign | 45 | 49
Total gross deferred liabilities | 654 | 644
Net deferred taxes, assets | $ 23 |
Net deferred taxes, liabilities |  | $ (52)

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