Segment Information - Schedule of Segment Information for Operation Statement (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018
Operating revenues	$ 16,688	$ 12,682	$ 56,446	$ 53,996
Operating income (loss)			(1,401)	(5,183)
Depreciation and amortization			389	460
Tangible assets	27,947	21,567	27,947	21,567
Goodwill	720	720	720	720
Other intangible assets	19	19	19	19
Total Assets	28,686	22,306	28,686	22,306
Capital expenditures			345	107
EPCM [Member]
Operating revenues			19,436	24,152
Operating income (loss)			(830)	1,141
Depreciation and amortization			189	123
Tangible assets	6,253	4,792	6,253	4,792
Goodwill
Other intangible assets
Total Assets	6,253	4,792	6,253	4,792
Capital expenditures			202	66
Automation [Member]
Operating revenues			37,010	29,844
Operating income (loss)			4,692	(740)
Depreciation and amortization			109	122
Tangible assets	12,864	9,811	12,864	9,811
Goodwill	720	720	720	720
Other intangible assets	19	19	19	19
Total Assets	13,603	10,550	13,603	10,550
Capital expenditures			43	6
Corporate [Member]
Operating revenues
Operating income (loss)			(5,166)	(5,584)
Depreciation and amortization			91	215
Tangible assets	8,830	6,964	8,830	6,964
Goodwill
Other intangible assets
Total Assets	$ 8,830	$ 6,964	8,830	6,964
Capital expenditures			$ 100	$ 35