Condensed Consolidated Statement of Stockholders' Equity - 8 months ended Sep. 12, 2015 - 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]
Balance at January 3, 2015, Shares at Jan. 03, 2015	22,109,875	22,109,875
Balance at January 3, 2015 at Jan. 03, 2015	$ 187,414	$ 221	$ 181,140	$ 5,135	$ 186,496	$ 918
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,853			3,738	3,738	115
Distribution	$ (410)					(410)
Issuance of common stock - ESPP, Shares	27,910	27,910
Issuance of common stock - ESPP	$ 345		345		345
Share-based compensation, Shares		17,772
Share-based compensation	$ 815	$ 1	814		815
Balance at September 12, 2015, Shares at Sep. 12, 2015	22,155,557	22,155,557
Balance at September 12, 2015 at Sep. 12, 2015	$ 192,017	$ 222	$ 182,299	$ 8,873	$ 191,394	$ 623