Related-party Transactions (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Related Party Transaction [Line Items]
Outstanding purchase order	$ 309,100,000
Net sales	33,821,000	$ 29,110,000	$ 47,684,000
Purchases (1)	236,062,000	$ 242,638,000	227,661,000
Affiliated
Related Party Transaction [Line Items]
Outstanding purchase order	$ 79,900,000
Super Micro Computer | Ablecom Technology | Investee
Related Party Transaction [Line Items]
Ownership percentage	0.40%
Ablecom Technology
Related Party Transaction [Line Items]
Products purchased percent	95.00%	96.00%
Ablecom Technology | Affiliated
Related Party Transaction [Line Items]
Outstanding purchase order	$ 23,500,000	$ 22,800,000
Net sales	7,000	57,000	60,000
Purchases (1)	123,734,000	125,537,000	127,967,000
Accounts receivable and other receivables	5,556	6,017
Accounts payable and accrued liabilities	$ 30,762	29,788
Ablecom Technology | Charles Liang and wife | Investee
Related Party Transaction [Line Items]
Ownership percentage	10.50%
Ablecom Technology | Steve Liang and other family members | Management and immediate family member of management
Related Party Transaction [Line Items]
Ownership percentage	36.00%
Compuware
Related Party Transaction [Line Items]
Outstanding purchase order	$ 56,400,000	40,000,000
Compuware | Affiliated
Related Party Transaction [Line Items]
Net sales	22,959,000	29,053,000	47,624,000
Purchases (1)	118,912,000	126,051,000	$ 105,362,000
Accounts receivable and other receivables	7,908,000	3,654,000
Accounts payable and accrued liabilities	$ 32,216,000	$ 20,507,000
Compuware | Ablecom Technology | Affiliated
Related Party Transaction [Line Items]
Ownership percentage	11.70%