Subsequent Events (Details) - 2018 Kien Huat Preferred Stock Commitment Letter [Member] - Kien Huat Realty III Limited [Member] - Series F Preferred Stock - USD ($)	May 07, 2019	Nov. 06, 2018
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount		$ 126,000,000
Share Purchase Program Schedule, Period One [Member]
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount		12,000,000
Share Purchase Program Schedule, Period One [Member] | Subsequent Event
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount	$ 20,000,000
Share Purchase Program Schedule, Period Two [Member]
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount		20,000,000
Share Purchase Program Schedule, Period Two [Member] | Subsequent Event
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount	27,000,000
Share Purchase Program Schedule, Period Three [Member]
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount		20,000,000
Share Purchase Program Schedule, Period Three [Member] | Subsequent Event
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount	15,000,000
Share Purchase Program Schedule, Period Four [Member]
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount		15,000,000
Share Purchase Program Schedule, Period Four [Member] | Subsequent Event
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount	15,000,000
Share Purchase Program Schedule, Period Five [Member]
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount		$ 37,000,000
Share Purchase Program Schedule, Period Five [Member] | Subsequent Event
Subsequent Event [Line Items]
Share Purchase Agreement, Maximum Purchase Amount	$ 37,000,000