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Note 13 - Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 05, 2015 | Mar. 30, 2014 | Dec. 31, 2014
Note 13 - Commitments and Contingencies (Details) [Line Items] |  |  |
Product Warranty Accrual | $ 811,000 us-gaap_ProductWarrantyAccrual |  | $ 825,000 us-gaap_ProductWarrantyAccrual
Product Warranty Expense | 64,000 us-gaap_ProductWarrantyExpense | 67,000 us-gaap_ProductWarrantyExpense |
Extended Product Warranty Accrual, Warranties Issued | 749,000 us-gaap_ExtendedProductWarrantyAccrualWarrantiesIssued |  | 839,000 us-gaap_ExtendedProductWarrantyAccrualWarrantiesIssued
Accrual for Environmental Loss Contingencies | 0 us-gaap_AccrualForEnvironmentalLossContingencies |  | 0 us-gaap_AccrualForEnvironmentalLossContingencies
Purchase Obligation | 5,542,000 us-gaap_PurchaseObligation |  |
Letters of Credit Outstanding, Amount | $ 755,000 us-gaap_LettersOfCreditOutstandingAmount |  |
Link Encryption Products [Member] | Minimum [Member] |  |  |
Note 13 - Commitments and Contingencies (Details) [Line Items] |  |  |
Extended Product Warranty, Term | 3 years |  |
Link Encryption Products [Member] | Maximum [Member] |  |  |
Note 13 - Commitments and Contingencies (Details) [Line Items] |  |  |
Extended Product Warranty, Term | 5 years |  |

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
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- Definition Represents the aggregate increase in the liability for accruals related to extended product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to standard product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(5)) -URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249 + Details
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- Definition The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3,4)) -URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249 + Details
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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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