Stockholders' Equity - Distributions (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended	24 Months Ended
Jan. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Equity [Abstract]
Daily amount of distribution accrued per share (in dollars per share)	$ 0.000924658	$ 0.000924658	$ 0.00184932
Annualized distribution (in dollars per share)		$ 0.3375	$ 0.675
Operating loss carryforwards				$ 86.0

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

Name:	us-gaap_OperatingLossCarryforwards
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant