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Income Taxes - Deferred Tax Asset (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Deferred tax assets
Net operating loss carryforward	$ 5,813	$ 6,024
Capital loss carryover	4,880	4,442
GAAP/Tax basis differences	712	814
Total deferred tax assets	11,405	11,280
Deferred tax liabilities
Deferred tax liabilities	4	2
Valuation allowance	(9,480)	(9,503)
Total net deferred tax asset	$ 1,921	$ 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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