Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 15, 2019	Dec. 31, 2017	Aug. 31, 2016
Income Taxes [Line Items]
Annual distribution requirement to shareholders	90.00%	90.00%
Issuance senior notes, stated percentage	7.875%
Debt instrument, maturity year	2025
Deferred tax asset, valuation allowance	$ 0
Net operating loss	$ 165,200,000
Percentage of net operating loss carryforwards limitation.	80.00%
Net operating loss limitations on use	approximately $321.0 million which will not expire but the utilization of which will be limited to 80% of taxable income annually under provisions enacted in the Tax Cut and Jobs Act
Income tax examination, year open to examination	2017
Interest and penalties net of tax recognized	$ 100,000
Accrued interest and penalties on unrecognized tax benefits	$ 1,300,000
Earliest Tax Year
Income Taxes [Line Items]
Operating loss carry forwards expiration year	2026
Latest Tax Year
Income Taxes [Line Items]
Operating loss carry forwards expiration year	2037
Tax Without Expire Period
Income Taxes [Line Items]
Net operating loss	$ 321,000,000.0
Tower Cloud, Inc.
Income Taxes [Line Items]
Business acquisition date	Aug. 31, 2016
Percentage of equity acquired				100.00%
Net operating loss			$ 18,300,000	$ 81,200,000
Tower Cloud, Inc. | Minimum
Income Taxes [Line Items]
Operating loss carry forwards expiration year	2026
Tower Cloud, Inc. | Maximum
Income Taxes [Line Items]
Operating loss carry forwards expiration year	2036