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Note 2 - Property and Equipment (Details) - Property and Equipment (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property and Equipment [Abstract]
Computer equipment	$ 9,817us-gaap_MachineryAndEquipmentGross	$ 9,969us-gaap_MachineryAndEquipmentGross
Software	3,369us-gaap_CapitalizedComputerSoftwareGross	3,441us-gaap_CapitalizedComputerSoftwareGross
Furniture, fixtures, and equipment	756us-gaap_FurnitureAndFixturesGross	734us-gaap_FurnitureAndFixturesGross
Leasehold improvements	1,127us-gaap_LeaseholdImprovementsGross	1,052us-gaap_LeaseholdImprovementsGross
Test equipment	6,401us-gaap_PropertyPlantAndEquipmentOther	4,928us-gaap_PropertyPlantAndEquipmentOther
Construction-in-progress	2,405us-gaap_ConstructionInProgressGross	1,421us-gaap_ConstructionInProgressGross
	23,875us-gaap_PropertyPlantAndEquipmentGross	21,545us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation and amortization	(15,043)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	(14,481)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
	$ 8,832us-gaap_PropertyPlantAndEquipmentNet	$ 7,064us-gaap_PropertyPlantAndEquipmentNet

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.14)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 14

-Article 5

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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- Definition

Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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- Definition

Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

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-Paragraph 1

-Subparagraph (b)

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-Section 45

-Paragraph 4

-Subparagraph (f)

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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-Publisher FASB

-Name Accounting Standards Codification

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-Subparagraph (b)

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-Paragraph 4

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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-Section S99

-Paragraph 1

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



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-Publisher SEC

-Name Regulation S-X (SX)

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Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

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-Publisher FASB

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