Stock-based Compensation (Restricted stock award) (Details) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Shares
Outstanding at end of period (in shares)	70,000
Restricted Stock [Member] \| C3J Stock Plan 2016 [Member]
Shares
Granted (in shares)	103,000
Forfeited/Cancelled (in shares)	(4,010)
Issued as Common Stock	(119,727)	343,493
Outstanding at end of period (in shares)	322,756
Weighted Avg Grant Date Fair Value
Granted (in dollars per share)	$ 3.34
Forfeited/Cancelled (in dollars per share)	16.02
Issued as Common Stock	12.24	$ 21.83
Outstanding at end of period (in dollars per share)	$ 19.55

Weighted average grant-date fair value of equity instruments other than options issued as common stock.

No definition available.

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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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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- Definition

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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- Definition

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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- Definition

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

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