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SEGMENT REPORTING (Schedule of Sales Data by Geographical Area) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
SEGMENT REPORTING |  |  |
Net Sales by Segment | $ 98,292 | $ 86,512 | $ 117,103
Net Sales by Segment (as a percent) | 100.00% | 100.00% | 100.00%
China |  |  |
SEGMENT REPORTING |  |  |
Net Sales by Segment | $ 2,926 | $ 4,021 | $ 9,490
Net Sales by Segment (as a percent) | 3.00% | 5.00% | 8.00%
Japan |  |  |
SEGMENT REPORTING |  |  |
Net Sales by Segment | $ 49,185 | $ 45,561 | $ 57,483
Net Sales by Segment (as a percent) | 50.00% | 52.00% | 49.00%
India |  |  |
SEGMENT REPORTING |  |  |
Net Sales by Segment | $ 42,352 | $ 33,021 | $ 34,836
Net Sales by Segment (as a percent) | 43.00% | 38.00% | 30.00%
Taiwan |  |  |
SEGMENT REPORTING |  |  |
Net Sales by Segment | $ 3,018 | $ 3,217 | $ 7,904
Net Sales by Segment (as a percent) | 3.00% | 4.00% | 7.00%
Other |  |  |
SEGMENT REPORTING |  |  |
Net Sales by Segment | $ 811 | $ 692 | $ 7,390
Net Sales by Segment (as a percent) | 1.00% | 1.00% | 6.00%

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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