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Note 6 - Leases and Deferred Rent (Details Textual) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) ft² | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Operating Leases, Rent Expense | $ | $ 999 | $ 1,099 | $ 1,420
Amortization of Deferred Charges | $ | $ 44 | $ 73 | $ 95
Facility in Gainesville [Member] |  |  |
Area of Real Estate Property | 5,000 |  |
Lessee, Operating Lease, Renewal Term | 10 years |  |
Facility in Hod Hasharon [Member] |  |  |
Area of Real Estate Property | 4,700 |  |
Lessee, Operating Lease, Renewal Term | 2 years |  |
Facility in Salt Lake City [Member] |  |  |
Area of Real Estate Property | 31,000 |  |
Warehouse in Shenzhen, China [Member] |  |  |
Area of Real Estate Property | 10,700 |  |
Facility in Austin, Texas [Member[ |  |  |
Area of Real Estate Property | 7,070 |  |
Warehouse in Salt Lake City, Utah [Member] |  |  |
Area of Real Estate Property | 40,000 |  |

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- Definition The amount of amortization of deferred charges applied against earnings during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Area of a real estate property. + References No definition available. + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Details
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