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Stockholders' Equity And Stock-Based Compensation Expense (Narrative) (Details) - USD ($)					1 Months Ended	3 Months Ended		6 Months Ended
	May 01, 2023	Apr. 30, 2023	Nov. 22, 2022	May 05, 2022	Mar. 31, 2020	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Proceeds from issuance of common stock upon exercise of stock options								$ 953,000	$ 330,000
Number of shares issued								0
Vesting period of stock options								4 years
Stock-based compensation expense						$ 835,000	$ 485,000	$ 1,508,000	$ 980,000
Par value per share						$ 0.001		$ 0.001		$ 0.001
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
ATM [Member] | Maximum [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Aggregate offering price	$ 200,000,000				$ 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						262,158		281,175
Proceeds from issuance of common stock upon exercise of stock options						$ 889,000		$ 953,000
Stock options exercised, net settled in satisfaction of the exercise price						92,066		97,205
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						$ 12.67		$ 12.67
Vesting period of stock options								2 years 4 months 24 days
Stock-based compensation expense								$ 8,800,000
Performance Award [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense								$ 100,000
Common Stock [Member] | Registered Direct Offering 2022 [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Number of shares issued			1,666,667
Price per share			$ 30.00
Proceeds from offering			$ 47,300,000

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