Stockholder's Equity - Schedule of 2017 Plan Options Outstanding (Details) - 2017 Plan - USD ($) $ / shares in Units, $ in Thousands	5 Months Ended	12 Months Ended
	Dec. 31, 2017	Jul. 31, 2017
Number of Shares
Outstanding at beginning of period (in shares)	0	0
Total options authorized (in shares)		400,000
Options granted (in shares)	(214,000)
Expired (in shares)	0
Forfeited (in shares)	(40,000)
Options available (in shares)	226,000
Outstanding at end of period (in shares)	174,000	0
Exercisable (in shares)	0
Weighted- average Exercise Price
Granted (in dollars per share)	$ 37.62
Forfeited (in dollars per share)	49.93
Outstanding (in dollars per share)	$ 34.78
Weighted- average Remaining Contractual Term (years)
Outstanding	9 years 8 months 16 days
Aggregate Intrinsic Value (in Thousands)
Outstanding	$ 14,430