Condensed Consolidated Statement of Stockholders' Equity - 8 months ended Sep. 10, 2016 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total Heritage-Crystal Clean, Inc. Stockholders' Equity [Member]	Noncontrolling Interest [Member]
Beginning balance (in shares) at Jan. 02, 2016	22,213,364	22,213,364
Beginning balance at Jan. 02, 2016	$ 189,833	$ 222	$ 182,558	$ 6,385	$ 189,165	$ 668
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,516			2,399	2,399	117
Distribution	(120)					(120)
Issuance of common stock – ESPP (in shares)		32,036
Issuance of common stock – ESPP	$ 325	$ 1	324		325
Exercise of stock options (in shares)	2,202	2,202
Exercise of stock options	$ 16		16		16
Share-based compensation (in shares)		25,339
Share-based compensation	$ 890		890		890
Ending balance (in shares) at Sep. 10, 2016	22,272,941	22,272,941
Ending balance at Sep. 10, 2016	$ 193,460	$ 223	$ 183,788	$ 8,784	$ 192,795	$ 665