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Note 7 - Stockholders' Equity and Stock-based Compensation (Details Textual) - USD ($)		12 Months Ended
	May 05, 2022	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 05, 2025
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.001	$ 0.001
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)		225,209
Proceeds from Stock Options Exercised		$ 90,000	$ 918,000	$ 2,560,000
Share-Based Payment Arrangement, Expense		19,582,000	16,291,000	4,586,000
Employee Severance [Member]
Share-Based Payment Arrangement, Expense		$ 0	$ 600,000	$ 0
Stock Options Net Settled in Satisfaction of the Exercise Price [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)		225,209
Stock Options Exercised Net Settled Satisfaction Of Exercise Price (in shares)		120,492
Proceeds from Stock Options Exercised		$ 0
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate		0.00%	0.00%	0.00%
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 24,500,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		2 years 4 months 24 days
Performance Shares [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 101,000
The 2018 Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)	10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)	5,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001
At-the-market 2025 Offering Program [Member]
Equity Offering, Maximum Amount					$ 50,000,000
Equity Offering, Percentage of Commission					3.00%
Stock Issued During Period, Shares, New Issues (in shares)		0

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