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Note 2 - Acquisition (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Aug. 01, 2024
Mar. 31, 2025
Mar. 31, 2025
Mar. 31, 2024
Cost of Revenue     $ 160,964 $ 110,356
Goodwill   $ 48,164 48,164 43,471
Net Income (Loss) Attributable to Parent     6,033 (11,111)
Amortization of Intangible Assets     2,400 2,200
Backlog [Member]        
Amortization of Intangible Assets     700 $ 100
Megatran [Member]        
Business Combination, Consideration Transferred $ 61,400      
Payments to Acquire Businesses, Gross $ 25,000      
Business Acquisition, Share Price (in dollars per share) $ 24.16      
Business Combination, Acquired Receivable, Fair Value $ 16,100      
Business Combination, Acquired Receivables, Gross Contractual Amount 16,900      
Business Combination, Acquired Receivables, Estimated Uncollectible 800      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory 700      
Cost of Revenue     700  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles   2,000 2,000  
Business Combination, Recognized Liability Assumed, Deferred Tax Liability 6,400 5,600 5,600  
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liability   (800)    
Goodwill   4,700 4,700  
Revenues     50,500  
Net Income (Loss) Attributable to Parent     6,000  
Amortization of Intangible Assets     800  
Megatran [Member] | Backlog [Member]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 700 700 700  
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) 8 years      
Megatran [Member] | Customer Relationships [Member]        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 1,300 $ 1,300 1,300  
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) 10 years      
Megatran [Member] | Selling, General and Administrative Expenses [Member]        
Business Combination, Acquisition Related Costs     $ 1,100