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Selected Statements of Operations Data (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Schedule of revenues from sales to unaffiliated customers |  |  |  |
Revenues |  | $ 33,010 | $ 34,050 | $ 37,233
North America [Member] |  |  |  |
Schedule of revenues from sales to unaffiliated customers |  |  |  |
Revenues |  | 14,500 | 22,164 | 25,157
Asia [Member] |  |  |  |
Schedule of revenues from sales to unaffiliated customers |  |  |  |
Revenues | [1] | 14,146 | 7,158 | 4,874
Latin America [Member] |  |  |  |
Schedule of revenues from sales to unaffiliated customers |  |  |  |
Revenues |  | 2,653 | 3,579 | 2,666
Other [Member] |  |  |  |
Schedule of revenues from sales to unaffiliated customers |  |  |  |
Revenues |  | $ 1,711 | $ 1,149 | $ 4,536
[1] | Includes Japan and the Philippines which each of them accounted for more than 10% of Company's revenues in 2019.

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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