Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		12 Months Ended
	Feb. 29, 2020	Jan. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Sale proceeds of common shares			$ 27,396	$ 102,850
Common Shares [Member]
Subsequent Event [Line Items]
Shares issued			2,214,490	9,540,000
Subsequent Event [Member] | Jefferies, Stifel and Guggenheim Securities, LLC [Member] | Underwritten Public Offering [Member]
Subsequent Event [Line Items]
Sale proceeds of common shares		$ 56,400
Additional proceeds from issuance of common stock		$ 8,460
Subsequent Event [Member] | Jefferies, Stifel and Guggenheim Securities, LLC [Member] | Underwritten Public Offering [Member] | Common Shares [Member]
Subsequent Event [Line Items]
Shares issued	562,500	3,750,000
Shares price		$ 16.00