Stock-Based Compensation, Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Unrecognized Compensation Expense [Abstract]
Weighted average period of recognition	6 months
Maximum [Member]
Unrecognized Compensation Expense [Abstract]
Unrecognized compensation expense	$ 0.1
Restricted Stock Units [Member]
Number of Units [Abstract]
Unvested balance at beginning of period (in shares)	0	77,237
Granted (in shares)	290,861	0
Vested (in shares)	(146,364)	(68,091)
Forfeited and expired (in shares)	(53,957)	(9,146)
Unvested balance at end of period (in shares)	90,540	0
Weighted-Average Grant Date Fair Value [Abstract]
Unvested balance at beginning of period (in dollars per share)	$ 0	$ 2.46
Granted (in dollars per share)	1.44	0
Vested (in dollars per share)	1.42	2.46
Forfeited and expired (in dollars per share)	1.45	2.46
Unvested balance at end of period (in dollars per share)	$ 1.45	$ 0

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

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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