v3.20.4
Acquisition of Simply Mac - Additional Information (Detail) - Simply Mac, Inc. [Member] - Stock Purchase Agreement [Member] - USD ($)
12 Months Ended
Sep. 25, 2019
Sep. 20, 2019
May 09, 2019
Dec. 31, 2019
Business Acquisition [Line Items]        
Stock purchase agreement date     May 09, 2019  
Stock purchase agreement amended date   Sep. 20, 2019    
Aggregate consideration for stock purchase $ 12,554,000      
Cash consideration 4,696,000      
Value of implied goodwill deductible for tax purposes $ 411,000      
Payments on consideration including working capital adjustment       $ 5,157,000
Working capital adjustment       $ 461,000
12% Secured Promissory Note [Member]        
Business Acquisition [Line Items]        
Notes payable, interest rate 12.00%      
Purchase consideration as promissory note $ 7,858,000