Share-Based Compensation Plan - Stock Option Awards (Details) - Incentive Plan 2017 - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock options
Shares
Outstanding in beginning of the year (in shares)	3,415
Granted (in shares)	1,014
Exercised (in shares)	(11)
Forfeited (in shares)	(50)
Expired (in shares)	(38)
Outstanding at the end of the year (in shares)	4,330	3,415
Shares, Exercisable at the end of the period (in shares)	1,965
Weighted Average Exercise Price
Outstanding at the beginning of the period (USD per share)	$ 7.16
Granted (USD per share)	4.13
Exercised (USD per share)	3.10
Forfeited (USD per share)	4.07
Expired (USD per share)	11.97
Outstanding at the end of the period (USD per share)	6.45	$ 7.16
Exercisable at the end of the period (USD per share)	$ 9.56
Outstanding, Weighted Average Remaining Contractual Term (years)	7 years 8 months 12 days
Exercisable, Weighted Average Remaining Contractual Term (years)	6 years 9 months 18 days
Outstanding, Aggregate Intrinsic Value	$ 0
Exercisable, Aggregate Intrinsic Value	0
Intrinsic value of options exercised	$ 0	$ 0	$ 0
Weighted-average grant-date fair value of stock options granted (USD per share)	$ 2.39	$ 1.51	$ 2.52
Total unrecognized compensation cost	$ 3,000,000
Non-vested Shares
Weighted Average Exercise Price
Weighted-average period over which cost is expected to be recognized	1 year 9 months 18 days

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.