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Note 1 - Summary of Operations and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Property, Plant and Equipment, Estimated Useful Life [Table Text Block] |
Building s | 1 0 | – | 2 0 |
Machinery and Equipmen t | 5 | – | 1 0 |
Furniture and Fixture s | 3 | – | 1 0 |
Computer Hardware and Softwar e | 3 | – | 5 |
Leasehold Improvement s | Lesser of useful life or lease ter m |

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- Definition The tabular disclosure of estimated useful life for property, plant and equipment. + References No definition available. + Details
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Namespace Prefix: | ulbi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration