Summary of Significant Accounting Policies (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Net income available to Class A common stockholders: | ||||
| Interest income | $ 1,805,000 | $ 1,279,000 | $ 3,566,000 | $ 2,355,000 |
| Less: Income and franchise taxes | (420,000) | (269,000) | (830,000) | (535,000) |
| Expenses available to be paid with interest income from Trust (up to a maximum of $750,000 per year) | (221,000) | (458,000) | ||
| Net income available to Class A common stockholders | 1,385,000 | 789,000 | 2,736,000 | 1,362,000 |
| Net income available to Class F common stockholders: | ||||
| Net income | 341,000 | 789,000 | 1,480,000 | 1,362,000 |
| Less: amount attributable to Class A common stockholders | (1,385,000) | (789,000) | (2,736,000) | (1,362,000) |
| Net income (loss) available to class F common stockholders | $ (1,044,000) | $ (1,256,000) | ||