Inventory (Tables)

12 Months Ended

Dec. 28, 2019

Inventory Disclosure [Abstract]

Schedule of Inventory

The carrying value of inventory consisted of the following:

(thousands)	December 28, 2019		December 29, 2018
Solvents and solutions	$	8,694	$	8,216
Used oil and processed oil	8,349		12,124
Machines	5,440		5,334
Drums and supplies	4,697		5,231
Other	2,632		2,378
Total inventory	29,812		33,283
Less: machine refurbishing reserve	439		224
Total inventory - net	$	29,373	$	33,059