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Segment Information, Revenues by Geography and Significant Customers (Percentage of Revenues, Accounts Receivable) (Detail) | 3 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Jun. 30, 2012
Revenue, Major Customer [Line Items] |  |  |
Percentage of Revenues | 10.00% |  |
Percentage of Accounts Receivable | 10.00% |  |
Streakwave Wireless Inc. [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Percentage of Revenues | 15.00% | 18.00% |
Percentage of Accounts Receivable | 14.00% |  | 11.00%
Flytec Computers Inc. [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Percentage of Revenues |  | 16.00% |
Percentage of Accounts Receivable | 12.00% |  | 19.00%
Discomp [Member] |  |  |
Revenue, Major Customer [Line Items] |  |  |
Percentage of Accounts Receivable | 11.00% |  | 12.00%

X
- Definition Entity wide accounts receivable major customer percentage. + References No definition available. + Details
Name: | ubnt_EntityWideAccountsReceivableMajorCustomerPercentage
Namespace Prefix: | ubnt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration