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Note 9 - Stockholders' Equity (Details Textual) $ / shares in Units, $ in Thousands				2 Months Ended	12 Months Ended
	Dec. 01, 2025 shares	Nov. 20, 2025 shares	Feb. 12, 2024 shares	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2026 USD ($)	Nov. 09, 2026 USD ($)	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2022 shares	Dec. 31, 2019	Dec. 31, 2017	Nov. 09, 2025	Jul. 31, 2002 shares
Common Stock, Number of Votes Per Share							1
Stock Issued During Period, Shares, New Issues (in shares)	450,000	3,000,000
Proceeds From Issuance of Common Stock, Net \| $							$ 63,261	$ 0	$ 0
Payments of Stock Issuance Costs \| $							$ 650
Preferred Stock, Shares Authorized (in shares)				5,000,000			5,000,000	5,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares				$ 0.001			$ 0.001	$ 0.001
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)				1,000,000			1,000,000
Share Repurchase Program Additional Number of Shares Authorized To Be Repurchased (in shares)				7,800,000			7,800,000
Share Repurchase Program, Remaining Authorized, Number of Shares				684,486			684,486
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross							0			0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares								$ 10.46	$ 11.3
Share-based Compensation Arrangement by Share-based Payment Award, Options and Stock Appreciation Rights, Exercises in Period, Intrinsic Value \| $							$ 194	$ 187	$ 173
Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded			7,268
Chief Operating Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded			6,460
Chief Commercial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded			6,460
Performance Share Units [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Percentage of License Revenue Target, Proportional Percentage to Be Received upon Achievement				99.00%			99.00%
Short-Term Executive PSUs [Member]
Share-Based Compensation, Term Extension (Year)													2 years
Share-Based Payment Arrangement, Plan Modification, Incremental Cost \| $				$ 371
Short-Term Executive PSUs [Member] \| Forecast [Member]
Share-Based Payment Arrangement, Plan Modification, Incremental Cost \| $					$ 2,356	$ 2,727
Short-Term Executive PSUs [Member] \| Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							25,795
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded, Percentage			100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded			51,918
Short-Term Executive PSUs [Member] \| Chief Financial Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							5,158
Short-Term Executive PSUs [Member] \| Chief Operating Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							4,585
Short-Term Executive PSUs [Member] \| Chief Commercial Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							4,585
Short-Term Executive PSUs [Member] \| CFO, COO, and CCO [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded, Percentage			70.00%
RSUs and PSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)							988,322
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Vesting Date Fair Value (in dollars per share) \| $ / shares							$ 26.25
Stock Options, Stock Appreciation Rights, Restricted Stock Units, and Performance Share Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant				1,088,491			1,088,491
Share-Based Payment Arrangement, Employee [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period											3 years	1 year
Share-Based Payment Arrangement, Tranche One [Member] \| Share-Based Payment Arrangement, Nonemployee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage							25.00%
Vesting on February 16, 2025 [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			33.40%
Vesting on February 16, 2025 [Member] \| Short-Term Executive PSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage							33.40%
Vesting on February 16, 2026 [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			33.30%
Vesting on February 16, 2026 [Member] \| Short-Term Executive PSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage							33.30%
Vesting on February 16, 2027 [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			33.30%
Vesting on February 16, 2027 [Member] \| Short-Term Executive PSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage							33.30%
Goals One [Member] \| Short-Term Executive PSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			90.00%
Goals One [Member] \| Short-Term Executive PSUs [Member] \| Full Vesting Based on The Achievement of 2022 License Target [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			50.00%
Goals One [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return In Excess of 100 Percent of S&P500 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			100.00%
Goals One [Member] \| Short-Term Executive PSUs [Member] \| Increase in Eligible PSUs, Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage			7.00%
Goals One [Member] \| Short-Term Executive PSUs [Member] \| Chief Executive Officer [Member] \| Increase in Eligible PSUs, Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage			10.00%
Goals One [Member] \| Maximum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Achievement In Excess of 90 Percent [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			99.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			99.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage			110.00%
Goals One [Member] \| Minimum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Achievement In Excess of 90 Percent [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			91.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			90.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage			1.00%
Goals Two [Member] \| Short-Term Executive PSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			25.00%
Goals Two [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return In Excess of 100 Percent of S&P500 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			100.00%
Goals Two [Member] \| Short-Term Executive PSUs [Member] \| Increase in Eligible PSUs, Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage			7.00%
Goals Two [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return Being at Least 90 Percent of S&P500 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			25.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			90.00%
Goals Two [Member] \| Short-Term Executive PSUs [Member] \| Chief Executive Officer [Member] \| Increase in Eligible PSUs, Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage			10.00%
Goals Two [Member] \| Maximum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return In Excess of 100 Percent of S&P500 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage			110.00%
Goals Two [Member] \| Maximum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return Being at Least 90 Percent of S&P500 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			99.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			99.00%
Goals Two [Member] \| Minimum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return In Excess of 100 Percent of S&P500 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage			1.00%
Goals Two [Member] \| Minimum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return Being at Least 90 Percent of S&P500 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			91.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			90.00%
Goals Three [Member] \| Short-Term Executive PSUs [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			25.00%
Goals Three [Member] \| Short-Term Executive PSUs [Member] \| Increase in Eligible PSUs, Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage			7.00%
Goals Three [Member] \| Short-Term Executive PSUs [Member] \| Full Vesting Based on The Achievement of Positive Shareholder Return [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			25.00%
Goals Three [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return Being at Least 90 Percent of Russel 2000 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			90.00%
Goals Three [Member] \| Short-Term Executive PSUs [Member] \| Chief Executive Officer [Member] \| Increase in Eligible PSUs, Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage			10.00%
Goals Three [Member] \| Maximum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return Being at Least 90 Percent of Russel 2000 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			99.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			99.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage			110.00%
Goals Three [Member] \| Minimum [Member] \| Short-Term Executive PSUs [Member] \| Vesting Based on Actual Return Being at Least 90 Percent of Russel 2000 Index [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			91.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage			90.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage			1.00%
The2011 Stock Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			34,612
The2011 Stock Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Chief Financial Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			15,575
The2011 Stock Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Chief Operating Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			13,844
The2011 Stock Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Chief Commercial Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			13,844
The2011 Stock Incentive Plan [Member] \| Performance Share Units [Member] \| Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			51,918
The2011 Stock Incentive Plan [Member] \| Performance Share Units [Member] \| Chief Financial Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			10,383
The2011 Stock Incentive Plan [Member] \| Performance Share Units [Member] \| Chief Operating Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			9,229
The2011 Stock Incentive Plan [Member] \| Performance Share Units [Member] \| Chief Commercial Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			9,229
The2011 Stock Incentive Plan [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period							4 years
The2011 Stock Incentive Plan [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage							25.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period							1 year
The2011 Stock Incentive Plan [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period							36 months
The2011 Stock Incentive Plan [Member] \| Vesting After the First Anniversary Grant Date [Member] \| Share-Based Payment Arrangement, Nonemployee [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			50.00%
The 2002 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant				553,333			553,333							3,950,000
Period Employees Eligible To Participate in Employee Stock Purchase Plan (Month)							5 months
Minimum Working Hours for Eligibility of Employee Stock Purchase Plan							20
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)							154,600	147,367	133,938
Shares Issued, Price Per Share (in dollars per share) \| $ / shares				$ 19.09			$ 19.09	$ 19.56	$ 25.33
Proceeds from Stock Plans \| $							$ 2,952	$ 2,883	$ 3,393
The 2002 Employee Stock Purchase Plan [Member] \| Commencement of Offer Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Price, Percentage Fair Value Market Value				85.00%			85.00%
The 2002 Employee Stock Purchase Plan [Member] \| Last Day of Purchase Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Vesting Price, Percentage Fair Value Market Value				85.00%			85.00%