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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Deferred tax assets    
Net operating loss carryforward $ 3,144 $ 3,615
Capital loss carryover 7,631 7,549
GAAP/Tax basis differences 1,361 254
Total deferred tax assets 12,136 11,418
Deferred tax liabilities    
GAAP/Tax basis differences 6,004 6,681
Total deferred tax liabilities 6,004 6,681
Valuation allowance (6,442) (5,136)
Total net deferred tax liability $ (310) $ (399)