Segment Information - Schedule of Segment Information for Operation Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016	Dec. 31, 2016
Revenue	$ 12,896	$ 15,968	$ 41,336	$ 44,622
Gross profit	1,621	3,881	5,865	7,407
SG&A	3,041	3,511	9,503	10,214
Operating income (loss)	(1,420)	370	(3,638)	(2,807)
Other income	2	10	57	17
Interest expense, net	(19)	(44)	(95)	(129)
Tax (expense)	(10,717)	153	(10,250)	1,056
Net loss	(12,154)	489	(13,926)	(1,863)
Total Assets	30,245		30,245		$ 44,436
EPCM [Member]
Revenue	8,573	8,216	26,833	25,000
Gross profit	899	1,454	3,618	2,877
SG&A	873	909	2,667	2,432
Operating income (loss)	26	545	951	445
Total Assets	8,316		8,316		6,530
Automation [Member]
Revenue	4,323	7,752	14,503	19,622
Gross profit	722	2,427	2,247	4,530
SG&A	531	685	1,670	2,203
Operating income (loss)	191	1,742	577	2,327
Total Assets	10,503		10,503		10,296
Corporate [Member]
Revenue
Gross profit
SG&A	1,637	1,917	5,166	5,579
Operating income (loss)	(1,637)	$ (1,917)	(5,166)	$ (5,579)
Total Assets	$ 11,426		$ 11,426		$ 27,610