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23. Segment Information (Details - Operations) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Sep. 30, 2017 | Oct. 01, 2016
Revenues | $ 25,484 | $ 27,356 | $ 74,505 | $ 77,457
Gross profit | 8,429 | 8,451 | 23,171 | 21,078
Operating income (loss) | 1,128 | 1,415 | 2,004 | (465)
Depreciation and amortization | 445 | 302 | 1,054 | 936
Recycling [Member] |  |  |  |
Revenues | 11,806 | 12,254 | 30,171 | 29,688
Gross profit | 4,433 | 4,362 | 10,238 | 7,929
Operating income (loss) | 1,092 | 1,527 | 166 | 84
Depreciation and amortization | 131 | 256 | 651 | 785
Technology [Member] |  |  |  |
Revenues | 0 | 0 | 0 | 0
Gross profit | 0 | 0 | 0 | 0
Operating income (loss) | (272) | 0 | (272) | 0
Depreciation and amortization | 272 | 0 | 272 | 0
Retail [Member] |  |  |  |
Revenues | 13,678 | 15,102 | 44,334 | 47,769
Gross profit | 3,996 | 4,089 | 12,933 | 13,149
Operating income (loss) | 308 | (112) | 2,110 | (549)
Depreciation and amortization | $ 42 | $ 46 | $ 131 | $ 151

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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/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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