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Income Taxes - Deferred Tax Asset (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets |  |
Net operating loss carryforward | $ 3,213 | $ 2,416
Capital loss carryover | 1,173 | 739
GAAP/Tax basis differences | 4,073 | 3,903
Total deferred tax assets | 8,459 | 7,058
Deferred tax liabilities |  |
Deferred tax liabilities | 5 | 6
Valuation allowance | (7,403) | (6,069)
Total net deferred tax asset | $ 1,051 | $ 983

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