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Note 1 - Summary of Operations and Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2015
Buildings [Member] | Minimum [Member] |
Estimated Useful Life | 10 years
Buildings [Member] | Maximum [Member] |
Estimated Useful Life | 20 years
Machinery And Equipment [Member] | Minimum [Member] |
Estimated Useful Life | 5 years
Machinery And Equipment [Member] | Maximum [Member] |
Estimated Useful Life | 10 years
Furniture And Fixtures [Member] | Minimum [Member] |
Estimated Useful Life | 3 years
Furniture And Fixtures [Member] | Maximum [Member] |
Estimated Useful Life | 10 years
Computer Hardware And Software [Member] | Minimum [Member] |
Estimated Useful Life | 3 years
Computer Hardware And Software [Member] | Maximum [Member] |
Estimated Useful Life | 5 years

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ULBI_BuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ULBI_ComputerHardwareAndSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |