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Major customers accounted for at least 10% of total revenues (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Ingram Micro Inc.    
Percent of total revenues 38.00% 32.00%
Threshold percentage for disclosure 10.00% 10.00%
BlueStar, Inc.    
Percent of total revenues 21.00% 21.00%
Threshold percentage for disclosure 10.00% 10.00%
ScanSource, Inc.    
Percent of total revenues 10.00%
Threshold percentage for disclosure 10.00% 10.00%