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Note 8 - Debt - Interest Rate Margins (Details) | Dec. 31, 2015
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Greater than $8 million | Alternate Base Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 1.00%
Greater than $8 million | LIBOR Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 2.00%
$5-$8million | Alternate Base Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 1.25%
$5-$8million | LIBOR Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 2.25%
Less than $5 million | Alternate Base Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 1.50%
Less than $5 million | LIBOR Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 2.50%

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- References No definition available. + Details
Name: | ULBI_DebtInstrumentInterestRateMargin
Namespace Prefix: | ULBI_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | ULBI_ApplicableMarginAxis=ULBI_GreaterThanEightMillionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ULBI_QuarterlyUndrawnBorrowingAvailabilityAxis=ULBI_AltBaseRateLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ULBI_QuarterlyUndrawnBorrowingAvailabilityAxis=ULBI_LIBORRateLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ULBI_ApplicableMarginAxis=ULBI_FiveToEightMillionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ULBI_ApplicableMarginAxis=ULBI_LessThanFiveMillionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |