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Note 12 - Acquisitions (Details Textual) - USD ($)
3 Months Ended
Jan. 10, 2022
Jul. 01, 2021
Mar. 01, 2021
Jan. 15, 2021
Jun. 30, 2022
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Goodwill, Ending Balance           $ 15,612,954   $ 14,404,618
Payments to Acquire Businesses, Gross           $ 4,203,734 $ 7,081,277  
Reverso Asset Purchase Agreement [Member] | Reverso Pumps, Inc. [Member]                
Asset Acquisition, Consideration Transferred, Total $ 2,600,000              
Komtek Forge Acquisition [Member]                
Business Combination, Consideration Transferred, Total       $ 3,653,308        
Goodwill, Ending Balance       832,306        
Payments to Acquire Businesses, Gross       840,551        
Business Combination, Consideration Transferred, Liabilities Incurred       $ 1,753,757        
Komtek Forge Acquisition [Member] | Common Class A [Member]                
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)       60,000        
Acquisition of Global Tek Manufacturing LLC [Member]                
Business Combination, Consideration Transferred, Total     $ 6,324,429          
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)     61,475          
Goodwill, Ending Balance     $ 1,896,607          
Payments to Acquire Businesses, Gross     4,926,035          
Business Combination, Acquisition Related Costs and Payments for Debt     1,400,000          
Business Combination, Contingent Consideration, Liability, Total     1,500,000          
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Annual Value, High     750,000          
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low     0          
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     1,500,000          
Business Combination, Consideration Transferred, Liabilities Incurred     1,398,394          
Acquisition of Global Tek Manufacturing LLC [Member] | Forecast [Member]                
Payment for Contingent Consideration Liability, Operating Activities         $ 750,000      
Acquisition of Global Tek Manufacturing LLC [Member] | Trade Names [Member]                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total     1,200,000          
Acquisition of Global Tek Manufacturing LLC [Member] | Customer Lists [Member]                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total     $ 1,041,000          
Acquisition of Emergency Hydraulics LLC [Member]                
Business Combination, Consideration Transferred, Liabilities Incurred   $ 287,359            
Acquisition of Emergency Hydraulics LLC [Member] | Customer Lists [Member]                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total   $ 478,649            
Reverso Pumps, Inc. [Member]                
Business Combination, Consideration Transferred, Total 4,203,734              
Goodwill, Ending Balance 1,378,191              
Payments to Acquire Businesses, Gross 3,973,375              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total 1,300,000              
Business Combination, Consideration Transferred, Liabilities Incurred 230,359              
Reverso Pumps, Inc. [Member] | Separ America [Member]                
Payments to Acquire Businesses, Gross 1,600,000              
Reverso Pumps, Inc. [Member] | Customer List and Trademarks [Member]                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total $ 1,300,000