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ACQUISITIONS - Bureau of Internet Accessibility Inc - Tangible and intangible assets acquired and liabilities assumed (parenthetical) (Details)
6 Months Ended
Mar. 09, 2022
USD ($)
Y
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
ACQUISITIONS      
Amortization expense   $ 357,000 $ 221,000
Bureau of internet accessibility Inc      
ACQUISITIONS      
Cash payment $ 5,100,000    
Aggregate consideration for acquisition 7,467,000    
Contingent consideration liability $ 2,585,000 214,000 158,000
Transaction costs   $ 0 $ 240,000
Bureau of internet accessibility Inc | Discount rate      
ACQUISITIONS      
Fair value of the contingent consideration liability, Measurement input 9.0    
Bureau of internet accessibility Inc | Discount rate | Recurring      
ACQUISITIONS      
Fair value of the contingent consideration liability, Measurement input 10.5    
Bureau of internet accessibility Inc | Discount rate | Non-recurring      
ACQUISITIONS      
Fair value of the contingent consideration liability, Measurement input 11.5    
Bureau of internet accessibility Inc | Volatility rate      
ACQUISITIONS      
Fair value of the contingent consideration liability, Measurement input 24.65    
Bureau of internet accessibility Inc | Risk-free interest rate      
ACQUISITIONS      
Fair value of the contingent consideration liability, Measurement input 1.58    
Bureau of internet accessibility Inc | Discount periods | Recurring      
ACQUISITIONS      
Fair value of the contingent consideration liability, Measurement input | Y 2.22    
Bureau of internet accessibility Inc | Discount periods | Non-recurring      
ACQUISITIONS      
Fair value of the contingent consideration liability, Measurement input | Y 1.01    
Maximum | Bureau of internet accessibility Inc      
ACQUISITIONS      
Useful life 7 years    
Minimum | Bureau of internet accessibility Inc      
ACQUISITIONS      
Useful life 2 years