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Organization and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2019
Jun. 30, 2012
Concentration Risk [Line Items]            
Funding received from suppliers and developers for development efforts reducing research and development expense     $ 0.8 $ 2.0    
Cancellation fee, net, received from canceled joint venture reducing research and development expense $ 9.5   $ 12.0      
Supplier concentration risk | Purchases, Total            
Concentration Risk [Line Items]            
Concentration risk percentage 26.10% 20.10% 27.90% 21.20%    
Supplier concentration risk | Purchases | Ablecom Technology            
Concentration Risk [Line Items]            
Concentration risk percentage 9.40%   9.80%      
Supplier concentration risk | Purchases | Compuware            
Concentration Risk [Line Items]            
Concentration risk percentage   9.90%   9.40%    
Customer concentration risk | Accounts receivable | One customer            
Concentration Risk [Line Items]            
Concentration risk percentage         17.00%  
Minimum            
Concentration Risk [Line Items]            
Product warranty, term     15 months      
Maximum            
Concentration Risk [Line Items]            
Product warranty, term     39 months      
Management Company | Super Micro Asia Science and Technology Park, Inc.            
Concentration Risk [Line Items]            
Contribution in variable interest entity           $ 0.2
Ownership percentage of variable interest entity           50.00%
Coronavirus (COVID-19) Pandemic            
Concentration Risk [Line Items]            
Revenue recognition delayed due to coronavirus (COVID-19) pandemic $ 3.4