Stockholders' Equity - Schedule of 2017 Plan Options Outstanding (Details) - 2017 Plan - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended	5 Months Ended
	Feb. 13, 2018	Jan. 04, 2018	Jan. 01, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 08, 2017	Jul. 31, 2017
Number of Shares/Number of Options Outstanding
Granted (in shares)				157,050	214,000
Forfeited (in shares)					(40,000)
Outstanding at beginning of period (in shares)			174,000	174,000	0
Outstanding at end of period (in shares)				331,050	174,000
Weighted- average Exercise Price
Exercised (in dollars per share)				$ 24.81	$ 37.62
Forfeited (in dollars per share)					49.93
Outstanding (in dollars per share)				$ 30.05	$ 34.78
Weighted- average Remaining Contractual Term (years)
Granted					9 years 8 months 16 days
Outstanding				9 years 7 months 21 days	9 years 8 months 16 days
Aggregate Intrinsic Value (in Thousands)
Outstanding				$ 3,060
Employee Stock Option
Number of Shares/Number of Options Outstanding
Options available (in shares)				170,381	226,000		0
Total options authorized (in shares)						400,000	400,000
Annual additional options authorized (in shares)			101,431	101,431
Granted (in shares)	100,000	57,050
Weighted- average Exercise Price
Exercised (in dollars per share)	$ 24.79	$ 24.84