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Note 5 - Debt - Interest Rate Margins (Details) | Dec. 31, 2014
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Greater than $8 million | Alternate Base Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 1.00%ulbi_DebtInstrumentInterestRateMargin / ulbi_ApplicableMarginAxis = ulbi_GreaterThanEightMillionMember / ulbi_QuarterlyUndrawnBorrowingAvailabilityAxis = ulbi_AltBaseRateLoansMember
Greater than $8 million | LIBOR Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 2.00%ulbi_DebtInstrumentInterestRateMargin / ulbi_ApplicableMarginAxis = ulbi_GreaterThanEightMillionMember / ulbi_QuarterlyUndrawnBorrowingAvailabilityAxis = ulbi_LIBORRateLoansMember
$5-$8million | Alternate Base Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 1.25%ulbi_DebtInstrumentInterestRateMargin / ulbi_ApplicableMarginAxis = ulbi_FiveToEightMillionMember / ulbi_QuarterlyUndrawnBorrowingAvailabilityAxis = ulbi_AltBaseRateLoansMember
$5-$8million | LIBOR Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 2.25%ulbi_DebtInstrumentInterestRateMargin / ulbi_ApplicableMarginAxis = ulbi_FiveToEightMillionMember / ulbi_QuarterlyUndrawnBorrowingAvailabilityAxis = ulbi_LIBORRateLoansMember
Less than $5 million | Alternate Base Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 1.50%ulbi_DebtInstrumentInterestRateMargin / ulbi_ApplicableMarginAxis = ulbi_LessThanFiveMillionMember / ulbi_QuarterlyUndrawnBorrowingAvailabilityAxis = ulbi_AltBaseRateLoansMember
Less than $5 million | LIBOR Rate Loans |
Interest Rate Margin on Outstanding Borrowings | 2.50%ulbi_DebtInstrumentInterestRateMargin / ulbi_ApplicableMarginAxis = ulbi_LessThanFiveMillionMember / ulbi_QuarterlyUndrawnBorrowingAvailabilityAxis = ulbi_LIBORRateLoansMember

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Data Type: | num:percentItemType
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Period Type: | instant

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Name: | ulbi_ApplicableMarginAxis=ulbi_GreaterThanEightMillionMember
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Name: | ulbi_ApplicableMarginAxis=ulbi_LessThanFiveMillionMember
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