Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

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Summary of Significant Accounting Policies (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Net income available to Class A common stockholders:    
Interest income $ 6,482,000 $ 5,559,000
Less: Income and franchise taxes (1,520,000) (1,330,000)
Expenses available to be paid with interest income from Trust (up to a maximum of $750,000 per year) (125,000) (1,372,000)
Net income available to Class A common stockholders 4,837,000 2,857,000
Net income available to Class F common stockholders:    
Net income 1,387,000 2,806,000
Less: amount attributable to Class A common stockholders (4,837,000) (2,857,000)
Net (loss) available to class F common stockholders $ (3,450,000) $ (51,000)