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Note 4 - Acquisition (Details Textual) - Honeywell International, Inc. [Member] - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Mar. 15, 2021
Mar. 31, 2021
Mar. 31, 2021
Mar. 31, 2020
Business Combination, Consideration Transferred, Total $ 230,000      
Payments to Acquire Businesses, Gross $ 207,000      
Business Acquisition, Percentage of Voting Interests Acquired 100.00%      
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) 25,000      
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   $ 6,500    
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual   $ 500    
Business Combination, Acquisition Related Costs     $ 5,200 $ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables, Allowance for Doubtful Accounts $ 200      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory $ 3,000      
Cost of Sales [Member]        
Expense Related to Step Up Value of Acquired Inventory     $ 300