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Major customers accounted for at least 10% of total revenues (Details)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Ingram Micro Inc.    
Percent of total revenues 36.00% 42.00%
Threshold percentage for disclosure 10.00% 10.00%
BlueStar, Inc.    
Percent of total revenues 17.00% 21.00%
Threshold percentage for disclosure 10.00% 10.00%