The amount of liability recorded for the early exercise of stock options.

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Term of award in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Percentage of automatic annual increase in shares reserved for issuance.

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Minimum percentage at which the shares are permitted to be purchased under the shares based arrangement.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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The cash inflow associated with the amount received from the stock plan during the period.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of options outstanding, including both vested and non-vested options.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of share options (or share units) exercised during the current period.

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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 01, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jan. 01, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options outstanding		3,452,080		3,452,080			2,749,441
Stock-based compensation expense		$ 1,100	$ 624	$ 1,893	$ 685
Expected dividend yield				0.00%
Exercise of stock options (in shares)				119,131
Procceds from Employee Stock Purchase Plan				$ 295	0
2001 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for future issuance	2,674,749	1,850,346		1,850,346
Number of shares available for grant		600,737		600,737
Vesting Period	4 years
2001 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period	10 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for future issuance		278,170		278,170		203,993
Number of shares available for grant		424,482		424,482
Shares issued/purchased under ESPP				57,681
Annual incremental percentage		1.00%		1.00%
Minimum Percentage		85.00%		85.00%
Stock-based compensation expense		$ 102		$ 102
Procceds from Employee Stock Purchase Plan				$ 300
2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for future issuance		1,854,490		1,854,490		1,019,967
Annual incremental percentage		5.00%		5.00%
2021 \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award, term				10 years
Options to purchase common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 998	624	$ 1,791	$ 685
Expected dividend yield				0.00%	0.00%
Options to purchase common stock \| 2001 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period				48 months
Stock options with early exercise option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of stock options (in shares)				0	0
Liability recorded		$ 0	$ 0	$ 0	$ 0