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Note 5 - Leases (Details Textual) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 01, 2020 USD ($) | Jun. 30, 2020 USD ($) a ft² | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) a ft² | Jun. 30, 2019 USD ($)
Operating Lease, Payments | $ |  | $ 421,000 | $ 577,000 | $ 900,000 | $ 1,100,000
HONG KONG |  |  |  |  |
Area of Land (Acre) | a |  | 9,600 |  | 9,600 |
HONG KONG | Subsequent Event [Member] |  |  |  |  |
Percent of Increase in Monthly Lease Cost Savings | 10.00% |  |  |  |
Operating Lease Liability, Increase From Modification | $ | $ 831,000 |  |  |  |
Rolling Hills Estates [Member] |  |  |  |  |
Area of Land (Acre) |  | 4,900 |  | 4,900 |
Lessee, Operating Lease, Renewal Term (Year) |  | 5 years |  | 5 years |
Monterey Park, California [Member] |  |  |  |  |
Area of Land (Acre) |  | 2,400 |  | 2,400 |
Richmond, British Columbia [Member] |  |  |  |  |
Area of Land (Acre) |  | 1,600 |  | 1,600 |
Metuchen, New Jersey [Member] |  |  |  |  |
Area of Land (Acre) |  | 2,000 |  | 2,000 |
CHINA |  |  |  |  |
Lessee, Number of Branches |  | 8 |  | 8 |

X
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X
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X
- 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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