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Federal Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Minimum distribution percentage of annual taxable income to qualify as REIT 90.00%  
Maximum percentage of total assets consisting of securities of TRS 20.00%  
Deferred tax assets, net $ 0.9 $ 2.0
Deferred tax assets, applicable reserves 1.7 0.0
Deferred tax assets, capital loss carryforwards 0.1 0.1
Deferred tax assets, operating loss carryforwards $ 2.5 $ 1.9
Minimum percentage of unrealized deferred tax asset required for qualification of valuation allowance 50.00%