SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2015	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Capitalized software development costs	$ 1.5ubnt_CapitalizedComputerSoftware	$ 3.0ubnt_CapitalizedComputerSoftware
Internally Developed Software \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life		3 years
Internally Developed Software \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life		5 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration