Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Mar. 06, 2020	Aug. 09, 2019	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Gross proceeds received from issuance of Series E preferred stock			$ 10,000	$ 0
Series E Preferred Stock
Subsequent Event [Line Items]
Preferred stock, shares issued (in shares)		10,000
Gross proceeds received from issuance of Series E preferred stock		$ 10,000
Series E Preferred Stock | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, shares issued (in shares)	25,000
Purchase price (in dollars per share)	$ 1,000
Gross proceeds received from issuance of Series E preferred stock	$ 25,000