Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Prepaid Expense and Other Current Assets [Abstract]
Receivables from vendors	$ 90,006	$ 83,050
Prepaid income tax	15,483	607
Restricted cash	16,804	11,673
Prepaid expenses	9,704	7,269
Deferred service costs	3,790	3,374
Others (2)	12,315	3,822
Total prepaid expenses and other current assets	148,102	109,795
Receivables from contract manufacturers, buy-sell arrangement	87,100	82,000
VAT receivable, Current	$ 8,400	$ 0