Shareholders' Equity - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jul. 09, 2019	Oct. 31, 2021	Dec. 31, 2019	Oct. 29, 2019
Weighted average grant-date fair value
Unvested shares outstanding, modified (in shares)		26,000
CEO Award
Number of options outstanding
Options outstanding, beginning of period (in shares)		1,700,000
Stock option grant (in shares)	1,700,000	0
Exercise of stock options (in shares)		0
Stock options forfeited (in shares)		0
Options outstanding, end of period (in shares)		1,700,000
Weighted-average exercise price
Weighted-average exercise price outstanding (in usd per share) (beginning of period)		$ 13.74
Weighted-average exercise price of options exercised (in usd per share)		13.74
Weighted-average exercise price outstanding (in usd per share) (end of period)		$ 13.74
Weighted-average remaining life
Weighted-average remaining life of options outstanding (in years)		7 years 8 months 12 days
Aggregate intrinsic value
Aggregate intrinsic value of options outstanding		$ 8.9	$ 5.6	$ 11.3
Number of options unvested
Options unvested, beginning of period (in shares)		680,000
Options vested (in shares)		(170,000)
Options unvested, end of period (in shares)		510,000
Weighted average grant-date fair value
Weighted average grant-date fair value of options unvested (in usd per share) (beginning of period)		$ 5.35
Weighted-average grant-date fair value of options (in usd per share)		5.35
Weighted average grant-date fair value of options unvested (in usd per share) (end of period)		$ 5.35
Options vested and expected to vest (in shares)		1,700,000
Options exercisable (in shares)		1,190,000
Weighted-average exercise price of options vested and expected to vest (in usd per share)		$ 13.74
Weighted-average exercise price of options exercisable (in usd per share)		$ 13.74
Weighted-average remaining life of options vested and expected to vest (in years)		7 years 8 months 12 days
Weighted-average remaining life of options exercisable (in years)		7 years 8 months 12 days
Aggregate intrinsic value of options vested and expected to vest		$ 8.9
Aggregate intrinsic value of options exercisable		$ 6.2
CEO Award | Maximum
Number of options outstanding
Exercise of stock options (in shares)		(500,000)
2020 Incentive Award Plan
Number of options outstanding
Options outstanding, beginning of period (in shares)		698,000
Stock option grant (in shares)		0
Exercise of stock options (in shares)		(22,000)
Stock options forfeited (in shares)		(190,000)
Options outstanding, end of period (in shares)		486,000
Weighted-average exercise price
Weighted-average exercise price outstanding (in usd per share) (beginning of period)		$ 11.62
Weighted-average exercise price of options exercised (in usd per share)		10.19
Weighted-average exercise price of options forfeited (in usd per share)		12.00
Weighted-average exercise price outstanding (in usd per share) (end of period)		$ 11.55
Weighted-average remaining life
Weighted-average remaining life of options outstanding (in years)		8 years 2 months 12 days
Aggregate intrinsic value
Aggregate intrinsic value of options outstanding		$ 3.6
Number of options unvested
Options unvested, beginning of period (in shares)		664,000
Options vested (in shares)		(112,000)
Options unvested, end of period (in shares)		362,000
Weighted average grant-date fair value
Weighted average grant-date fair value of options unvested (in usd per share) (beginning of period)		$ 3.61
Weighted-average grant-date fair value of options (in usd per share)		3.61
Weighted average grant-date fair value of options unvested (in usd per share)		3.61
Weighted average grant-date fair value of options unvested (in usd per share) (end of period)		$ 3.99
Options vested and expected to vest (in shares)		486,000
Options exercisable (in shares)		124,000
Weighted-average exercise price of options vested and expected to vest (in usd per share)		$ 11.55
Weighted-average exercise price of options exercisable (in usd per share)		$ 10.23
Weighted-average remaining life of options vested and expected to vest (in years)		8 years 2 months 12 days
Weighted-average remaining life of options exercisable (in years)		7 years 7 months 6 days
Aggregate intrinsic value of options vested and expected to vest		$ 3.6
Aggregate intrinsic value of options exercisable		$ 1.1