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Major Customers Accounted for at Least 10% of Total Revenues (Details)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Ingram Micro Inc.    
Percent of total revenues 42.00% 32.00%
Threshold percentage for disclosure 10.00% 10.00%
BlueStar, Inc.    
Percent of total revenues 21.00% 23.00%
Threshold percentage for disclosure 10.00% 10.00%