Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Segment Reporting Information [Line Items]
Revenues	$ 9,790	$ 10,267	$ 23,684	$ 27,553
Gross profit	2,564	3,393	5,581	7,955
Operating loss	(2,621)	(1,671)	(7,885)	(4,836)
Depreciation and amortization	1,076	1,009	3,046	2,993
Interest expense, net	75	45	81	675
Net loss before benefit for income taxes	(2,690)	(1,465)	(7,182)	(5,170)
Recycling
Segment Reporting Information [Line Items]
Revenues	9,790	10,267	23,684	27,553
Gross profit	2,564	3,393	5,581	7,955
Operating loss	(1,319)	(469)	(4,200)	(1,209)
Depreciation and amortization	139	76	238	196
Interest expense, net	75	45	81	675
Net loss before benefit for income taxes	(1,388)	(263)	(3,497)	(1,543)
Technology
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Gross profit	0	0	0	0
Operating loss	(1,302)	(1,202)	(3,685)	(3,627)
Depreciation and amortization	937	933	2,808	2,797
Interest expense, net	0	0	0	0
Net loss before benefit for income taxes	$ (1,302)	$ (1,202)	$ (3,685)	$ (3,627)