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Fair Value Measurements - Additional Information (Detail) - USD ($)
3 Months Ended
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Jan. 02, 2019
Fair Value Measurements, Non-recurring        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Liability measured and recognized at fair value   $ 0 $ 0  
Fair Value Measurements, Non-recurring | Fair Value, Level 3        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Privately-held investments measured at fair value   $ 348,000 348,000  
Viscount Systems, Inc.        
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]        
Fair value of earnout consideration $ 489,000   $ 750,000 $ 200,000
Business combination issued to sellers earnout consideration of shares 157,233