Segment Information - Schedule of Segment Information for Operation Statement (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 29, 2019	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018	Dec. 29, 2018
Revenue	$ 13,621		$ 13,872	$ 25,784	$ 27,059
Gross profit	$ 1,942		$ 2,253	$ 3,280	$ 3,665
Gross Profit Margin	14.30%		16.20%	12.70%	13.50%
SG&A	$ 2,450		$ 2,869	$ 4,755	$ 5,451
Operating income (loss)	(508)		(616)	(1,475)	(1,786)
Other income (expense) , net	26		(373)	41	(378)
Interest expense, net	(4)		(5)	(6)	(14)
Tax expense	31	$ 31	(2)	51	14
Net loss	(517)		(992)	(1,491)	(2,192)
Total Assets	25,184	25,184		25,184		$ 22,306
EPCM [Member]
Revenue	5,659		6,652	11,292	11,747
Gross profit	$ 828		$ 1,330	$ 1,499	$ 1,746
Gross Profit Margin	14.60%		20.00%	13.30%	14.90%
SG&A	$ 589		$ 531	$ 1,176	$ 957
Operating income (loss)	239		799	323	789
Total Assets	6,597	6,597		6,597		10,550
Automation [Member]
Revenue	7,962		7,220	14,492	15,312
Gross profit	$ 1,114		$ 923	$ 1,781	$ 1,919
Gross Profit Margin	14.00%		12.80%	12.30%	12.50%
SG&A	$ 390		$ 663	$ 819	$ 1,367
Operating income (loss)	724		260	962	552
Total Assets	8,673	8,673		8,673		4,792
Corporate [Member]
Revenue
Gross profit
Gross Profit Margin
SG&A	$ 1,471		$ 1,675	$ 2,760	$ 3,127
Operating income (loss)	(1,471)		$ (1,675)	(2,760)	$ (3,127)
Total Assets	$ 9,914	$ 9,914		$ 9,914		$ 6,964