Related Party Transactions (Details)												1 Months Ended	3 Months Ended	4 Months Ended	12 Months Ended
	Feb. 20, 2019 USD ($) shares	Nov. 13, 2018 USD ($) shares	Nov. 09, 2018 USD ($)	Aug. 07, 2018 USD ($)	May 26, 2017 USD ($)	Mar. 07, 2017 USD ($)	Jan. 24, 2017 USD ($)	Feb. 17, 2016 director	Feb. 10, 2016 USD ($)	Sep. 22, 2015 USD ($)	Dec. 09, 2013 USD ($)	Nov. 30, 2018 USD ($)	Feb. 20, 2019 USD ($) shares	Dec. 31, 2009 USD ($)	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Nov. 06, 2018 USD ($)	Mar. 15, 2018 shares
Related Party Transaction
Preferred stock, shares issued (shares) | shares																			200,000
Series F Preferred Stock issuance															$ 11,880,000	$ 0	$ 0
Issuance of Series F Preferred Stock														$ 6,901,208	$ 30,568,000
Voting power percentage (less than)														50.00%
Voting power percentage required to nominate directors															24.00%
Voting power percentage required															30.00%
Director
Related Party Transaction
Professional fees expensed							$ 2,500,000		$ 2,100,000		$ 250,000
Professional fees, payable upon execution											150,000
Professional fees, paid within 90 days											$ 100,000
Kien Huat Realty Limited [Member]
Related Party Transaction
Equity Investment Commitment										$ 375,000,000
Related Party Transaction, Closing Period, Number of Years After Closing Date								3 years
Related Party Transaction, Closing Period, Number of Years After Opening of Project								1 year
Related Party Transaction, Minimum Number of Independent Directors | director								3
Aggregate Equity Investment										340,000,000
Montreign Operating [Member] | Moelis & Company LLC [Member]
Related Party Transaction
Professional fees expensed						$ 100,000
Professional and Contract Services Expense					$ 178,000	$ 75,000
Follow-On Rights Offering [Member] | Kien Huat Realty Limited [Member]
Related Party Transaction
Agreement to Exercise Additional Rights, Participation Amount										$ 35,000,000
2018 Moelis Letter Agreement [Member] | Moelis & Company LLC [Member]
Related Party Transaction
Professional fees expensed			$ 3,000,000
2018 Moelis Letter Agreement Amendment [Member] | Moelis & Company LLC [Member]
Related Party Transaction
Professional fees expensed			$ 4,000,000	$ 100,000								$ 4,100,000
2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Related Party Transaction, Equity Financing, Maximum Without Reduction to Commitment Amount																		$ 29,000,000
Funding Fee, Percent																		1.00%
2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty Limited [Member] | Subsequent Event
Related Party Transaction
Issuance of Preferred Stock and Preference Stock, Funding Fee	$ 300,000												$ 300,000
RWS License Agreement [Member] | RW Services Pte Ltd [Member]
Related Party Transaction
Due to Related Parties															$ 900,000
Related Party Transaction, Expenses from Transactions with Related Party															$ 1,500,000
Series F
Related Party Transaction
Preferred stock, shares issued (shares) | shares															0
Issuance of Series F Preferred Stock															$ 43,003,000
Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Share Purchase Agreement, Maximum Purchase Amount																		$ 126,000,000
Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member] | Subsequent Event
Related Party Transaction
Preferred stock, shares issued (shares) | shares	320												320
Proceeds from Issuance of Preferred Stock and Preference Stock, Gross													$ 32,000,000
Series F Preferred Stock issuance													$ 31,700,000
Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty Limited [Member]
Related Party Transaction
Preferred stock, shares issued (shares) | shares		120
Proceeds from Issuance of Preferred Stock and Preference Stock, Gross		$ 12,000,000
Issuance of Preferred Stock and Preference Stock, Funding Fee		120,000
Series F Preferred Stock issuance		$ 11,900,000
Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty Limited [Member] | Subsequent Event
Related Party Transaction
Preferred stock, shares issued (shares) | shares	200												200
Proceeds from Issuance of Preferred Stock and Preference Stock, Gross	$ 20,000,000
Issuance of Preferred Stock and Preference Stock, Funding Fee	200,000												$ 200,000
Series F Preferred Stock issuance	$ 19,800,000
Share Purchase Program Schedule, Period One [Member] | Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Share Purchase Agreement, Maximum Purchase Amount																		12,000,000
Share Purchase Program Schedule, Period Two [Member] | Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Share Purchase Agreement, Maximum Purchase Amount																		20,000,000
Share Purchase Program Schedule, Period Three [Member] | Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Share Purchase Agreement, Maximum Purchase Amount																		20,000,000
Share Purchase Program Schedule, Period Four [Member] | Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Share Purchase Agreement, Maximum Purchase Amount																		15,000,000
Share Purchase Program Schedule, Period Five [Member] | Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Share Purchase Agreement, Maximum Purchase Amount																		37,000,000
Share Purchase Program Schedule, Period Six [Member] | Series F | 2018 Kien Huat Preferred Stock Commitment Letter [Member] | Kien Huat Realty III Limited [Member]
Related Party Transaction
Share Purchase Agreement, Maximum Purchase Amount																		$ 22,000,000