6. Sale and deconsolidation of variable interest entity - AAP (Details - AAP Operating Results) - ARCA Advanced Processing, LLC [Member] $ in Thousands	12 Months Ended
Dec. 30, 2017 USD ($)
Operating results of AAP
Revenues	$ 1,433
Gross profit	24
Operating loss	(848)
Net loss	$ (991)

Description of the amount of pre-tax income (loss) derived by the reporting entity from the Variable Interest Entity (VIE).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph d
-URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5747-111685

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- Definition

The amount of income (loss) from operations derived by the reporting entity during the period from the Variable Interest Entity (VIE).

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- Definition

The amount of activity, consisting of a transaction or a measure not described elsewhere in the taxonomy, occurring during the period between the reporting entity and the Variable Interest Entity (VIE) or potential VIE.

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- Definition

The amount of income between the reporting entity and the Variable Interest Entity (VIE).

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