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Shareholders' Equity - Summary of Restricted Stock Unit Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Fair Value Per Share, Granted		$ 2.49
Restricted Stock Units (RSUs) [Member]
Outstanding Restricted Stock Units, Beginning	57,000	61,000
Outstanding Restricted Stock Units, Granted	172,000	77,000
Outstanding Restricted Stock Units, Released	(58,000)	(38,000)
Outstanding Restricted Stock Units, Cancelled	(80,000)	(43,000)
Outstanding Restricted Stock Units, Ending	91,000	57,000
Outstanding Restricted Stock Units, Exercisable	78,000
Weighted Average Fair Value Per Share, Beginning	$ 3.57	$ 4.94
Weighted Average Fair Value Per Share, Granted	2.51	3.35
Weighted Average Fair Value Per Share, Released	3.05	4.09
Weighted Average Fair Value Per Share, Cancelled	2.65	4.17
Weighted Average Fair Value Per Share, Ending	$ 2.71	$ 3.57

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- Definition

Outstanding Resticted Stock Units, exercisable.

+ References

No definition available.

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- Definition

Outstanding Resticted Stock Units, Released.

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- Definition

Weighted Average Fair Value Per Share, Released.

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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
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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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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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