Percentage Of Commission ATM Offering

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Proceeds From Stock Options Exercised Net Settled Satisfaction Of Exercise Price

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Stock Options Exercised Net Settled Satisfaction Of Exercise Price

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

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Number of warrants or rights outstanding.

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Face amount or stated value per share of common stock.

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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 cash inflow from the additional capital contribution to the entity.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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The cash inflow associated with the amount received from holders exercising their stock warrants.

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Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of shares issued under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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Stockholders' Equity And Stock-Based Compensation Expense (Narrative) (Details) - USD ($)				1 Months Ended		3 Months Ended		6 Months Ended
	May 05, 2022	Feb. 12, 2021	Jan. 31, 2018	Mar. 31, 2020	Aug. 31, 2018	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	May 05, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Proceeds from issuance of common stock upon exercise of stock options								$ 330,000	$ 1,749,000
Proceeds from offering									189,825,000
Proceeds from exercise of warrants						$ 0	$ 0		692,000
Vesting period of stock options								4 years
Stock-based compensation expense						$ 485,000	415,000	$ 980,000	$ 665,000
Par value per share						$ 0.001		$ 0.001		$ 0.001
Common Stock Warrants [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Proceeds from issuance of common stock upon exercise of stock options							$ 700,000
Number of shares issued					9,100,000
Number of warrants outstanding							600,000		600,000
ATM [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Percentage of commission in ATM offering											3.00%
Number of shares issued						0		0
ATM [Member] \| Maximum [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Aggregate offering price				$ 100,000,000
2018 Equity Incentive Plan [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Expiration period			10 years
Par value per share	$ 0.001
2018 Equity Incentive Plan [Member] \| Maximum [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Shares issued	5,000,000
Stock Option [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock options exercised						155,915		175,524
Proceeds from issuance of common stock upon exercise of stock options						$ 119,000		$ 330,000
Stock options exercised, net settled in satisfaction of the exercise price						89,278		94,399
Proceeds from stock options exercised net settled in satisfaction of the exercise price						$ 0		$ 0
Stock Option [Member] \| Stock Option And Performance Award [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Weighted average exercise price or options						$ 11.06		$ 11.06
Vesting period of stock options								1 year 9 months 18 days
Stock-based compensation expense								$ 5,400,000
Performance Award [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense								$ 100,000
Common Stock [Member] \| 2021 Registered Direct Offering [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Number of shares issued		4,081,633
Price per share		$ 49.00
Proceeds from offering		$ 189,800,000