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Retirement Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
UNITED STATES
Defined Contribution Plan Disclosure [Line Items]
Contribution amount	$ 513	$ 397	$ 488
CANADA
Defined Contribution Plan Disclosure [Line Items]
Matching contributions	100.00%
Contribution amount	$ 30	$ 18	$ 59
Maximum | UNITED STATES
Defined Contribution Plan Disclosure [Line Items]
Matching contributions	100.00%
Employer matching contribution, percent of employees' gross pay	3.00%
Maximum | CANADA
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution, percent of employees' gross pay	5.00%
Minimum | UNITED STATES
Defined Contribution Plan Disclosure [Line Items]
Matching contributions	50.00%
Employer matching contribution, percent of employees' gross pay	2.00%
Minimum | CANADA
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution, percent of employees' gross pay	3.00%

X

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

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+ References

No definition available.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

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- Definition

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+ References

No definition available.

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