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Income Taxes - Deferred Tax Asset (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Deferred tax assets
Net operating loss carryforward	$ 5,269	$ 6,024
Capital loss carryover	4,980	4,442
GAAP/Tax basis differences	571	814
Total deferred tax assets	10,820	11,280
Deferred tax liabilities
Deferred tax liabilities	4	2
Valuation allowance	(8,852)	(9,503)
Total net deferred tax asset	$ 1,964	$ 1,775

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Amount of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

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