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Note 2 - Dispositions, Relocations and Exit Activities - New Lease (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Note 2 - Dispositions Relocations And Exit Activities - New Lease Details |  |
New lease term |  | 5 years
Number of rent-free months |  | 2 months
Monthly rent payments - RMB - first three years |  | $ 117ulbi_OperatingLeaseMonthlyRentinRMBFirstThreeYears
Monthly rent payments - RMB - last two years |  | 126ulbi_OperatingLeaseMonthlyRentinRMBLastTwoYears
Monthly rent payments - first three years |  | 19ulbi_OperatingLeaseMonthlyRentFirstThreeYears
Monthly rent payments - last two years |  | 20ulbi_OperatingLeaseMonthlyRentLastTwoYears
Government reimbursement received - China factory move |  | 815ulbi_GovernmentGrantReimbursementCashReceivedInConnectionWithChinaFactoryMove
Total estimated expenses of China factory move |  | 1,060ulbi_EstimatedExpensesInConnectionWithChinaFactoryMove
Government reimbursement recognized - China factory move |  | 596ulbi_GovernmentGrantReimbursementRevenueRecognizedAsReductionofExpenseInConnectionWithChinaFactoryMove
Expenses recognized - China factory move |  | 840ulbi_ExpensesRecognizedInConnectionWithChinaFactoryMove
Estimated expenses to be incurred - China factory move | 219ulbi_EstimatedExpensesRemainingToBeRecognizedInConnectionWithChinaFactoryMove |
Estimated revenue to be recognized - China move | $ 219ulbi_EstimatedRevenueRemainingToBeRecognizedInConnectionWithChinaFactoryMove |

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- Definition Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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