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Note 2 - Fair Value Measurement (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Oct. 01, 2020
USD ($)
Nov. 10, 2019
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ 2,346,000 $ (140,000) $ (3,348,000) $ 1,086,000      
CBS Acquisition [Member]              
Business Combination, Contingent Consideration, Liability, Total         $ 140,000    
CBS Acquisition [Member] | Measurement Input, Discount Rate [Member]              
Business Combination, Contingent Consideration, Liability, Measurement Input         0.210   0.260
CBS Acquisition [Member] | Measurement Input, Risk Free Interest Rate [Member]              
Business Combination, Contingent Consideration, Liability, Measurement Input         0.0023   0.0174
CBS Acquisition [Member] | Measurement Input, Price Volatility [Member]              
Business Combination, Contingent Consideration, Liability, Measurement Input         0.63   0.70
SciSafe Holdings, Inc [Member]              
Business Combination, Contingent Consideration, Liability, Total 5,700,000   5,700,000   $ 9,900,000 $ 3,700,000  
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ (2,300,000) $ 141,000 $ 3,300,000 $ (1,200,000)      
Business Combination, Contingent Consideration, Stock Issued (in shares) | shares 64,130            
SciSafe Holdings, Inc [Member] | Measurement Input, Discount Rate [Member]              
Business Combination, Contingent Consideration, Liability, Measurement Input 12.5   12.5     0.045  
SciSafe Holdings, Inc [Member] | Measurement Input, Risk Free Interest Rate [Member]              
Business Combination, Contingent Consideration, Liability, Measurement Input 4.1   4.1     0.0020  
SciSafe Holdings, Inc [Member] | Measurement Input, Asset Price Volatility [Member]              
Business Combination, Contingent Consideration, Liability, Measurement Input 66   66     0.60  
SciSafe Holdings, Inc [Member] | Measurement Input, Revenue Volatility [Member]              
Business Combination, Contingent Consideration, Liability, Measurement Input 30   30     0.15