Stockholders' Equity - Restricted Stock (Details) - $ / shares	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Restricted stock
Shares
Restricted stock at beginning of period	239,928	179,505
Granted	678,490	339,999
Vested	(548,248)	(275,115)
Cancelled		(4,461)
Restricted stock at end of period	370,170	239,928
Weighted Average Fair Value
Restricted stock at beginning of period	$ 4.02	$ 5.99
Granted	5.09	3.22
Vested	4.88	4.27
Cancelled		7.42
Restricted stock at end of period	$ 4.71	$ 4.02
Restricted stock \| Vest on grant date
Stockholders' Equity
Vesting percentage	50.00%
Restricted stock \| Vest on first anniversary
Stockholders' Equity
Vesting percentage	30.00%
Restricted stock \| Vest on each anniversary thereafter
Stockholders' Equity
Vesting percentage	10.00%
RSU's
Shares
Restricted stock at beginning of period	1,900	4,291
Vested	(1,900)	(2,342)
Cancelled		(49)
Restricted stock at end of period		1,900
Weighted Average Fair Value
Restricted stock at beginning of period	$ 26.60	$ 30.29
Vested	$ 26.60	33.15
Cancelled		36.57
Restricted stock at end of period		$ 26.60
Increments for delivery of shares for time-based awards	25.00%

Increments for delivery of shares for time-based awards

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

+ References

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- Definition

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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No definition available.

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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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-Publisher FASB
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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of vesting of award under share-based payment arrangement.

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