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Note 12 - Acquisitions (Details Textual) - USD ($)
9 Months Ended
Jul. 01, 2021
Mar. 01, 2021
Jan. 15, 2021
Sep. 30, 2021
Sep. 30, 2020
Payments to Acquire Businesses, Gross       $ 7,376,740 $ 9,400,000
Komtek Forge Acquisition [Member]          
Business Combination, Consideration Transferred, Total     $ 3,600,000    
Business Combination, Consideration Transferred, Liabilities Incurred     $ 1,702,000    
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 Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)   61,475      
Business Combination, Consideration Transferred, Liabilities Incurred   $ 1,600,000      
Payments to Acquire Businesses, Gross   4,900,000      
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   1,500,000      
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Annual Value, High   $ 750,000      
Acquisition of Emergency Hydraulics LLC [Member]          
Business Combination, Consideration Transferred, Liabilities Incurred $ 300,000