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Note 3 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 2 Months Ended 3 Months Ended
Jun. 11, 2020
Feb. 28, 2026
Feb. 28, 2026
Mar. 31, 2026
Mar. 31, 2025
Nov. 13, 2014
Share-Based Payment Arrangement, Expense       $ 41,098 $ 52,806  
Share Price (in dollars per share)   $ 1,164.83 $ 1,164.83      
Restricted Stock Units (RSUs) [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested       75,200 $ 31,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 390,200    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       2 years    
Restricted Stock Units (RSUs) [Member] | Employees [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)       4 years    
Restricted Stock Units (RSUs) [Member] | Executive Officer [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)       3 years    
Restricted Stock Units (RSUs) [Member] | Director [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)       1 year    
The 2026 Executive PSUs [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)     42,000      
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed Based on Average Revenue Growth Rate     300.00%      
Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Maximum Percentage Allowed Based on Manufacturing Capacity     200.00%      
Share-based Compensation Arrangement by Share-based Payment Award, Price Per Share Payable Upon Vesting of Equity Instruments Other than Options (in dollars per share)   $ 300        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)   3 years        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate   53.39%        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate   3.60%        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate   0.69%        
The 2026 Executive PSUs [Member] | Maximum [Member]            
Share-Based Payment Arrangement, Expense   $ 208,200        
The2014 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)           5,500,000
Amended and Restated 2014 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) 10,500,000          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)       3,400,000