Shareholders' Equity (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common stock, shares outstanding		21,787,728	21,708,190
Common stock issued, net		4,673,765
Conversion of Stock, Amount Converted		$ 0	$ 1,000
Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Converted	40,000,000
Common Class A [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Converted	250,000,000		250,000
Additional Paid-in Capital [Member]
Class of Stock [Line Items]
Conversion of Stock, Amount Converted			$ 1,000