Heritage-Crystal Clean (HCCI) 10-K 3 Mar 14 2013 FY Annual report Financial data

DEI_Document

DEI Document (USD $)	12 Months Ended
	Dec. 28, 2013	Feb. 14, 2014	Jun. 14, 2013
Entity [Abstract]	'	'	'
Entity Registrant Name	'Heritage-Crystal Clean, Inc.	'	'
Entity Central Index Key	'0001403431	'	'
Current Fiscal Year End Date	'--12-28	'	'
Entity Filer Category	'Accelerated Filer	'	'
Document Type	'10-K	'	'
Document Period End Date	28-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	18,445,799	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Public Float	'	'	$139,303,829

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Current Assets:	'	'
Cash and cash equivalents	$22,632	$47,766
Accounts receivable - net	31,172	23,338
Inventory - net	27,307	27,231
Deferred income taxes	1,004	759
Income tax receivables - current	28	648
Other current assets	3,633	2,821
Total Current Assets	85,776	102,563
Property, plant and equipment - net	85,116	72,246
Equipment at customers - net	19,358	17,946
Software and intangible assets - net	16,054	4,555
Goodwill	9,654	1,801
Total Assets	215,958	199,111
Current Liabilities:	'	'
Accounts payable	18,291	16,509
Accrued salaries, wages, and benefits	4,145	2,544
Taxes payable	1,292	1,066
Current maturities of long-term debt and term loan	2,906	1,803
Other accrued expenses	2,730	2,512
Total Current Liabilities	29,364	24,434
Term loan, less current maturities	17,500	18,250
Long-term debt, less current maturities	552	828
Contingent consideration, less current portion	0	451
Deferred income taxes	9,238	5,757
Total Liabilities	56,654	49,720
STOCKHOLDERS' EQUITY:	'	'
Common stock - 22,000,000 shares authorized at $0.01 par value, 18,360,282 and 18,068,852 shares issued and outstanding at December 28, 2013 and December 29, 2012, respectively	184	181
Additional paid-in capital	146,043	141,612
Retained earnings	12,143	7,598
Total Heritage-Crystal Clean, Inc. Stockholders' Equity	158,370	149,391
Noncontrolling Interest	934	0
Total Equity	159,304	149,391
Total Liabilities and Stockholders' Equity	$215,958	$199,111

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet - (Parentheticals) (USD $)	Dec. 28, 2013	Dec. 29, 2012
Statement of Financial Position [Abstract]	'	'
Common Stock, Shares Authorized	22,000,000	22,000,000
Common Stock, Par or Stated Value Per Share	$0.01	$0.01
Common Stock, Shares, Issued	18,360,282	18,068,852
Common Stock, Shares, Outstanding	18,360,282	18,068,852

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended						4 Months Ended				12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 07, 2013	Jun. 15, 2013	Mar. 23, 2013	Sep. 08, 2012	Jun. 16, 2012	Mar. 24, 2012	Dec. 28, 2013		Dec. 29, 2012		Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Revenues	'	'	'	'	'	'	'		'		'	'	'
Product revenues	$32,302	$28,906	$26,558	$31,348	$31,941	$21,215	$44,643	[1]	$34,966	[1]	$132,409	$119,470	$39,149
Service revenues	35,301	34,644	33,449	30,718	30,330	29,294	47,333	[1]	42,679	[1]	150,727	133,021	113,709
Total revenues	67,603	63,550	60,007	62,066	62,271	50,509	91,976	[1]	77,645	[1]	283,136	252,491	152,858
Operating expenses	'	'	'	'	'	'	'		'		'	'	'
Operating costs	55,698	52,201	52,286	52,718	51,908	42,337	74,453	[1]	66,605	[1]	234,638	213,568	124,000
Selling, general, and administrative expenses	7,051	7,049	6,591	5,566	6,235	5,756	9,583	[1]	8,637	[1]	30,274	26,194	20,715
Depreciation and amortization	2,224	2,163	1,859	1,904	1,911	1,772	3,278	[1]	2,554	[1]	9,524	8,141	5,657
Other expense (income) - net	138	101	-8	9	0	1	-21	[1]	-4	[1]	210	6	-10
Operating income	2,492	2,036	-721	1,869	2,217	643	4,683	[1]	-147	[1]	8,490	4,582	2,496
Interest expense b net	97	107	106	112	146	187	107	[1]	140	[1]	417	585	37
Income before income taxes	2,395	1,929	-827	1,757	2,071	456	4,576	[1]	-287	[1]	8,073	3,997	2,459
Provision for income taxes	1,061	872	-407	723	853	186	1,902	[1]	-19	[1]	3,428	1,743	985
Net income	1,334	1,057	-420	1,034	1,218	270	2,674	[1]	-268	[1]	4,645	2,254	1,474
Income attributable to noncontrolling interest	26	26	20	0	0	0	28	[1]	0	[1]	100	0	0
Income attributable to Heritage-Crystal Clean, Inc. common stockholders	$1,308	$1,031	($440)	$1,034	$1,218	$270	$2,646	[1]	($268)	[1]	$4,545	$2,254	$1,474
Net income per share: basic (in dollars per share)	$0.07	$0.06	($0.02)	$0.06	$0.07	$0.02	$0.15		($0.01)		$0.25	$0.13	$0.10
Net income per share: diluted (in dollars per share)	$0.07	$0.06	($0.02)	$0.06	$0.07	$0.02	$0.14		($0.01)		$0.24	$0.13	$0.10
Number of weighted average shares outstanding: basic	18,272	18,138	18,113	18,060	16,689	14,486	18,335	[1]	18,067	[1]	18,224	16,921	14,313
Number of weighted average shares outstanding: diluted	18,585	18,456	18,113	18,412	17,140	14,962	18,677	[1]	18,067	[1]	18,552	17,363	14,710
[1]	Reflects a sixteen week quarter.

Consolidated_Statement_of_Stoc

Consolidated Statement of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total Heritage-Crystal Clean, Inc. Stockholders' Equity [Member]	Noncontrolling Interest [Member]
In Thousands, except Share data, unless otherwise specified
Stockholders' Equity, beginning at Jan. 01, 2011	$73,544	$142	$69,532	$3,870	$73,544	$0
Shares, beginning at Jan. 01, 2011	'	14,220,321	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income	1,474	'	'	1,474	1,474	'
Issuance of common stock b acquisitions, shares	'	64,516	'	'	'	'
Issuance of common stock b acquisitions	800	1	799	'	800	'
Issuance of common stock b ESPP, shares	'	18,685	'	'	'	'
Issuance of common stock b ESPP	274	'	274	'	274	'
Exercise of stock options, shares	'	118,317	'	'	'	'
Exercise of stock options	1,401	1	1,400	'	1,401	'
Share-based compensation, shares	'	26,492	'	'	'	'
Share-based compensation	1,060	0	1,060	'	1,060	'
Share-based compensation	1,060	'	'	'	'	'
Stockholders' Equity, ending at Dec. 31, 2011	78,553	144	73,065	5,344	78,553	0
Shares, ending at Dec. 31, 2011	'	14,448,331	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income	2,254	'	'	2,254	2,254	'
Issuance of common stock b acquisitions	0	'	'	'	'	'
Issuance of common stock - net of issuance costs	65,482	34	65,448	'	'	'
Issuance of common stock b ESPP, shares	'	25,561	'	'	'	'
Issuance of common stock b ESPP	449	'	449	'	449	'
Exercise of stock options, shares	'	142,289	'	'	'	'
Exercise of stock options	1,587	2	1,585	'	1,587	'
Share-based compensation, shares	'	52,671	'	'	'	'
Share-based compensation	1,066	1	1,065	'	'	'
Share-based compensation	1,066	'	'	'	1,066	'
Stockholders' Equity, ending at Dec. 29, 2012	149,391	181	141,612	7,598	149,391	0
Shares, ending at Dec. 29, 2012	18,068,852	18,068,852	'	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Mirachem Acquisition	834	'	'	'	'	834
Net income	4,645	'	'	4,545	4,545	100
Issuance of common stock b acquisitions, shares	'	151,322	'	'	'	'
Issuance of common stock b acquisitions	2,231	2	2,229	'	2,231	'
Issuance of common stock b ESPP, shares	'	29,350	'	'	'	'
Issuance of common stock b ESPP	438	'	438	'	438	'
Exercise of stock options, shares	'	49,434	'	'	'	'
Exercise of stock options	398	'	398	'	398	'
Share-based compensation, shares	'	61,324	'	'	'	'
Share-based compensation	1,367	1	1,366	'	'	'
Share-based compensation	1,367	'	'	'	1,367	'
Stockholders' Equity, ending at Dec. 28, 2013	$159,304	$184	$146,043	$12,143	$158,370	$934
Shares, ending at Dec. 28, 2013	18,360,282	18,360,282	'	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Cash flows from Operating Activities:	'	'	'
Net income	$4,645	$2,254	$1,474
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	9,524	8,141	5,657
Bad debt provision	444	1,122	493
Share-based compensation	1,367	1,066	1,060
Other, net	59	124	86
Deferred taxes	3,236	1,278	2,775
Changes in operating assets and liabilities:	'	'	'
Increase in accounts receivable	-7,794	-7,413	-3,984
Decrease (increase) in income tax receivables	620	646	-1,267
Decrease (increase) in inventory	1,670	-5,970	-9,327
(Increase) decrease in prepaid and other current assets	-710	-866	199
Increase in accounts payable	189	2,894	5,999
Increase (decrease) in accrued expenses	2,133	-631	1,738
Cash provided by operating activities	15,383	2,645	4,903
Cash flows from Investing Activities:	'	'	'
Capital expenditures	-17,804	-22,351	-42,849
Software and intangible asset expenditures	-600	-835	-514
Proceeds from the sale of property, plant, and equipment	0	130	0
Business acquisitions, net of cash acquired	-21,165	0	-2,252
Cash used in investing activities	-39,569	-23,056	-45,615
Cash flows from Financing Activities:	'	'	'
Proceeds from issuance of common stock	438	65,932	274
Proceeds from the exercise of stock options	398	1,587	1,401
Repayments of contingent consideration	-551	-475	0
Repayments of Term Loan	-1,000	-500	0
Proceeds from Term Loan	750	0	20,000
Borrowings under revolving credit facility	0	28,180	0
Repayments of revolving credit facility	0	-28,180	0
Repayments of notes payable	-983	-553	-534
Cash (used in) provided by financing activities	-948	65,991	21,141
Net (decrease) increase in cash and cash equivalents	-25,134	45,580	-19,571
Cash and cash equivalents, beginning of period	47,766	2,186	21,757
Cash and cash equivalents, end of period	22,632	47,766	2,186
Supplemental disclosure of cash flow information:	'	'	'
Income taxes paid	285	284	310
Cash paid for interest, net of capitalized interest of $143, $104, and $223, respectively	366	549	0
Supplemental disclosure of non-cash information:	'	'	'
Payables for construction in progress	1,333	451	8,602
Business acquisitions, liabilities assumed	230	0	15
Business acquisitions, notes issued	1,265	0	2,384
Business acquisitions, common stock issued	($2,231)	$0	($800)

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows - (Parentheticals) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Statement of Cash Flows [Abstract]	'	'	'
Capitalized interest	$143	$104	$223

Organization_and_Nature_of_Ope

Organization and Nature of Operations	12 Months Ended
	Dec. 28, 2013
Organization and Nature of Operations [Abstract]	'
Organization and Nature of Operations	'
	ORGANIZATION AND NATURE OF OPERATIONS
	Heritage-Crystal Clean, Inc., a Delaware corporation and its subsidiaries (collectively the “Company”), provides parts cleaning and hazardous and non-hazardous waste services to small and mid-sized customers in both the manufacturing and vehicle service sectors.  The Company's service programs include parts cleaning, containerized waste management, used oil collection, vacuum truck services, and waste antifreeze collection and recycling. The Company also owns and operates a used oil re-refinery where it re-refines used oils and sells high quality base oil for lubricants as well as other re-refinery by-products.  The Company's locations are in the United States. The Company conducts its primary business operations through Heritage-Crystal Clean, LLC, its wholly owned subsidiary, and all intercompany balances have been eliminated in consolidation.
	The Company’s fiscal year ends on the Saturday closest to December 31.  The most recent fiscal year ended on December 28, 2013.  Each of the Company's first three fiscal quarters consists of twelve weeks while the last fiscal quarter consists of sixteen or seventeen weeks.
	In the Company's Environmental Services segment, product revenues include sales of solvent, machines, absorbent, accessories, and antifreeze to customers, and service revenues include drum waste removal services, servicing of parts cleaning machines, vacuum truck services, and other services.  In the Company's Oil Business segment, product revenues include sales of re-refined base oil, by-products, and used oil, and service revenues include revenues from collecting and disposing of waste water. Due to the Company's integrated business model, it is impracticable to separately present costs of tangible products and costs of services.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 28, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Use of Estimates
	The preparation of financial statements in conformity with Generally Accepted Accounting Principles ("GAAP") requires the use of certain estimates by management in determining the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of sales and expenses during the reporting period.  Significant items subject to such estimates and assumptions are the allowance for doubtful accounts receivable, valuation of inventory at lower of cost or market, valuation of goodwill and other intangible assets, and income taxes.  Actual results could differ from those estimates.
	Revenue Recognition
	The Company derives its revenues primarily from the services it performs and from the sale of processed oil from its used oil re-refinery. Parts cleaning and other service revenues are recognized as the service is performed. Product revenues are recognized at the time risk of loss passes to the customer. The risk of loss passes to customers at various times depending on the particular terms of the sales agreement in force with each individual customer. Common thresholds for when risk of loss passes to the customer are at the time that product is loaded onto the shipping vessel or at the time that product is offloaded at the customer’s receiving location. Revenues are recognized only if collection of the relevant receivable is probable, persuasive evidence of an arrangement exists, and the sales price is fixed or determinable.
	Sales Tax
	Amounts billed for sales tax, value added tax, or other transactional taxes imposed on revenue producing transactions are presented on a net basis and are not recognized as revenue.
	Operating Costs
	Within operating costs are cost of sales. Cost of sales in the Environmental Services segment includes the costs of the materials the Company sells and provides in its services, such as solvents and other chemicals, transportation of inventory and waste, and payments to third parties to recycle or dispose of the waste materials that the Company collects. Parts cleaning machines are either sold to a customer or continue to be owned by the Company but placed offsite at a customer location to be used in parts cleaning services. When sold to a customer, machines are removed from inventory, and the costs are recognized under operating costs. The used solvent that the Company retrieves from customers in its product reuse program is accounted for as a reduction in net cost of solvent under cost of sales, whether placed in inventory or sold to a purchaser for reuse. If the used solvent is placed in inventory it is recorded at lower of cost or net realizable value. Cost of sales in the Oil Business include the costs paid to customers for used oil, transportation out to customers, and costs to operate the used oil re-refinery, including personnel costs and utilities.
	Operating costs also include the Company's costs of operating its branch system and hubs. These costs include personnel costs (including commissions), facility rent and utilities, truck leases, fuel, transportation, and maintenance. Operating costs are not presented separately for products and services.
	Selling, General, and Administrative Expenses
	Selling, general, and administrative expenses include costs of performing centralized business functions, including sales management at or above the regional level, billing, receivables management, accounting and finance, information technology, environmental health and safety, and legal.
	Cash and Cash Equivalents
	The Company considers investments in highly liquid debt instruments, purchased with an original maturity of ninety days or less, to be cash equivalents.
	Concentration Risk
	The Company maintains its cash in bank deposit accounts at financial institutions that are insured by the Federal Deposit Insurance Corporation ("FDIC"). Cash balances may exceed FDIC limits. The Company has not experienced any losses in such accounts. The Company has a broad customer base and believes it is not exposed to any significant concentration of credit risk.
	Accounts Receivable
	Trade accounts receivable represent amounts due from customers. The allowance for doubtful accounts is the Company's best estimate of the amount of probable credit losses in the Company's existing accounts receivable. The Company determines the allowance based on analysis of customer credit worthiness, historical losses, and general economic trends and conditions. Accounts receivable are written off once the Company determines the account uncollectible. The Company does not have any off-balance-sheet credit exposure related to its customers.
	Inventory
	Inventory consists primarily of used oil, processed oil, catalyst, new and used solvents, new and refurbished parts cleaning machines, new and used antifreeze products, drums, and other items. Inventories are valued at the lower of first-in, first-out ("FIFO") cost or market, net of any reserves for excess, obsolete, or unsalable inventory. The Company performs a physical inventory count on a periodic basis and uses the results of these counts to determine inventory quantities. These quantities are used to help determine the value of the inventory.
	Processed oil inventory consists of the costs of feedstock, transportation, labor, conversion costs, and re-refining overhead costs incurred in bringing the inventory to its existing condition and location. Fixed production overhead costs are capitalized in processed oil inventory based on the normal capacity of the production facility. In periods of abnormal production levels, excess overhead costs are recognized as expense in the period they are incurred.
	The Company continually monitors its inventory levels at each of its distribution locations and evaluates inventories for excess or slow-moving items. If circumstances indicate the cost of inventories exceed their recoverable value, inventories are reduced to net realizable value.
	Prepaid and Other Current Assets
	Prepaid and other current assets include insurance and vehicle license contract costs, which are expensed over the term of the underlying contract.
	Property, Plant, and Equipment
	Property, plant, and equipment are stated at cost. Expenditures for major renewals and betterments are capitalized, while expenditures for repair and maintenance charges are expensed as incurred. Property, plant, & equipment acquired in business combinations is stated at fair value as of the date of the acquisition.
	Depreciation of property, plant, and equipment is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives of buildings and storage tanks range from 10 to 39 years. The estimated useful lives of machinery, vehicles, and equipment range from 3 to 25 years. Leasehold improvements are amortized over the shorter of the lease terms or five years using the straight-line method.
	The Company capitalizes interest on borrowings during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets. The interest rate used to capitalize interest is based upon the borrowing rate on the Company's bank debt outstanding. In fiscal 2013, 2012, and 2011, the Company capitalized interest of $0.1 million, $0.1 million, and $0.2 million, respectively, for capital projects.
	Equipment at Customers
	The Company records purchases of new parts cleaning machines as Inventory. Parts cleaning machines are either sold to a customer or continue to be owned by the Company but placed offsite at a customer location to be used in parts cleaning services. When sold to a customer, machines are removed from inventory, and the appropriate revenue and cost is recognized in the Income Statement. When the Company retains title to a machine that is placed off-site at a customer location to be used in parts cleaning services, the Company capitalizes the machine as a productive non-current asset under the Balance Sheet caption “Equipment at Customers” at the time the machine is placed at the customer’s site. Machines capitalized as Equipment at Customers are depreciated over their estimated useful lives of 10 or 15 years, depending on the model. Depreciation of in-service equipment commences when equipment is placed in service at a customer location. Expenditures for machines that are sold to a customer are treated as a cash outflow from operating activities on the Statement of Cash Flows. Expenditures for machines that are placed at a customer’s site to be used in parts cleaning services are treated as a cash outflow from investing activities.
	Acquisitions
	The Company accounts for acquired businesses using the purchase method of accounting, which requires that the assets acquired, liabilities assumed, and contingent consideration be recorded as of the date of acquisition at their respective fair values. It further requires that acquisition-related costs be recognized separately from the acquisition and expensed as incurred and restructuring costs to be expensed in periods subsequent to the acquisition date. The Company engaged third party valuation appraisal firms to assist the Company in determining the fair values and useful lives of the assets acquired. The Company records a preliminary purchase price allocation for its acquisitions and finalizes purchase price allocations as additional information relative to the fair values of the assets acquired becomes known.
	Identifiable Intangible Assets
	The fair value of identifiable intangible assets is based on significant judgments made by management. The Company engaged third party valuation appraisal firms to assist the Company in determining the fair values and useful lives of the assets acquired. Such valuations and useful life determinations require the Company to make significant estimates and assumptions. These estimates and assumptions are based on historical experience and information obtained from the management of the acquired companies and also include, but are not limited to, future expected cash flows to be earned from the continued operation of the acquired business and discount rates applied in determining the present value of those cash flows. Unanticipated events and circumstances may occur that could affect the accuracy or validity of such assumptions, estimates, or actual results. Acquisition-related finite lived intangible assets are amortized on a straight-line basis over their estimated economic lives. The Company evaluates the estimated benefit periods and recoverability of its intangible assets when facts and circumstances indicate that the lives may not be appropriate and/or the carrying value of the asset may not be recoverable. If the carrying value is not recoverable, impairment is measured as the amount by which the carrying value exceeds its estimated fair value.
	Software Costs
	The Company expenses costs incurred in the research stage of developing or acquiring internal use software, such as research and feasibility studies, as well as costs incurred in the post-implementation/operational stage, such as maintenance and training. Capitalization of software costs occurs only after the research stage is complete and after the development stage begins. The capitalized costs are amortized on a straight-line basis over the estimated useful lives of the software, ranging from 5 to 10 years.
	Impairment of Long-Lived Assets
	Long-lived assets, such as property and equipment and intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized as the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and would no longer be depreciated. No triggering events occurred that would indicate potential impairment during the periods presented.
	Income Taxes
	The Company accounts for income taxes to recognize the amount of taxes payable or refundable for the current year and the amount of deferred tax assets and liabilities resulting from the future tax consequences of differences between the financial statements and tax basis of the respective assets and liabilities. The Company estimates and reserves for any material uncertain tax position that is unlikely to withstand an audit by the taxing authorities. These estimates are based on judgments made with currently available information. The Company reviews these estimates and makes changes to recorded amounts of any uncertain tax positions as facts and circumstances warrant. For additional information about income taxes, see Note 14.
	Shipping Costs
	For all periods presented, amounts billed to customers related to shipping and handling are classified as revenue, and the Company's shipping and handling costs are included in operating costs.
	Research and Development
	Research and development costs are expensed as incurred within general, selling, and administrative expenses. Such costs incurred during fiscal 2013 were $0.3 million. For fiscal 2012 and 2011, research and development costs were less than $0.1 million.
	Advertising Costs
	Advertising costs are expensed as incurred. Advertising expense was $0.6 million, $0.5 million, and $0.5 million for fiscal 2013, 2012, and 2011, respectively.
	Share-Based Compensation
	The Company recognizes stock based compensation expense based on estimated grant date fair value of the awards. The Company values restricted stock as of the closing stock price on the measurement date and then amortizes the expense on a straight-line basis over the requisite service period.
	When a future restricted grant is approved, the Company evaluates the probability that the award will be granted, based on certain performance conditions. If the performance criteria are deemed probable, the Company accrues compensation expense related to these awards prior to the grant date. The Company accrues compensation expense based on the fair value of the performance awards at each reporting period when the performance criteria are deemed probable. Once the performance awards have been granted, the Company values the awards at fair value on the date of grant and amortizes the expense through the end of the vesting period. See Note 15 “Share-Based Compensation” for more details.
	Fair Value of Financial Instruments
	The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data.
	The Company’s financial instruments consist primarily of cash and cash equivalents, trade receivables, trade payables, notes payable, contingent consideration, and term debt.  As of December 28, 2013 and December 29, 2012, the carrying values of cash and cash equivalents, trade receivables, trade payables, notes payable, and contingent consideration, are considered to be representative of their respective fair values due to the short maturity of these instruments. Term debt is representative of its fair value due to the interest rates being applied.
	Insurance and Self-Insurance Policy
	The Company purchases insurance providing financial protection from a range of risks; as of the end of fiscal 2013, the Company's insurance policies provided coverage for general liability, vehicle liability, and pollution liability, among other exposures.  Each of these policies contains exclusions and limitations such that they would not cover all related exposures and each of these policies have maximum coverage limits and deductibles such that even in the event of an insured claim, the Company's net exposure could still have a material adverse effect on its financial results.
	The Company is self-insured for certain healthcare benefits provided to its employees. The liability for the self-insured benefits is limited by the purchase of stop-loss insurance. The stop-loss coverage provides payment for medical and prescription claims exceeding $75,000 per covered person, as well as an aggregate, cumulative claims cap, for any given year. Accruals for losses are made based on the Company's claim experience and actuarial estimates based on historical data. Actual losses may differ from accrued amounts. At December 28, 2013 and December 29, 2012, the Company's liability for its self-insured benefits was $0.8 million and $0.7 million, respectively. Should actual losses exceed the amounts expected and the recorded liabilities be insufficient, an additional expense will be recorded. Expenses incurred for healthcare benefits in fiscal 2013, 2012, and 2011 were $6.2 million, $6.0 million, and $4.0 million, respectively.
	Goodwill
	Goodwill is measured as a residual amount as of the acquisition date, which in most cases results in measuring goodwill as an excess of the purchase consideration transferred plus the fair value of any noncontrolling interest in the acquiree over the fair value of the net assets acquired, including any contingent consideration. The Company tests goodwill for impairment annually in the fourth quarter and in interim periods if changes in circumstances indicate that the carrying amount of goodwill may not be recoverable. The Company's determination of fair value requires certain assumptions and estimates, such as margin expectations, growth expectations, expected changes in working capital, etc., regarding future profitability and cash flows of acquired businesses and market conditions. In the fourth quarter of fiscal 2013, the Company tested goodwill for impairment on a quantitative basis and determined that the fair value of each reporting unit substantially exceeded the carrying value of the assets and no impairment existed as of December 28, 2013. However, due to the inherent uncertainties associated with using these assumptions, impairment charges could occur in future periods.
	The change in the carrying amount of goodwill by segment from December 31, 2011 to December 28, 2013 is as follows (in thousands):
		Oil Business		Environmental Services		Total
	Balance at December 31, 2011	$	1,801	$	—	$	1,801
	Fiscal Year 2012 Activity	—		—		—
	Balance at December 29, 2012	$	1,801	$	—	$	1,801
	Mirachem Acquisition	—		809		809
RFTI Acquisition	—		3,027		3,027
RTI Acquisition	—		1,917		1,917
ULNT/RS Acquisition	2,100		—		2,100
Balance at December 28, 2013	$	3,901	$	5,753	$	9,654
Reclassification
Certain amounts from fiscal 2012 have been reclassified to conform to the 2013 presentation.

Business_Combinations

Business Combinations	12 Months Ended
	Dec. 28, 2013
Business Combinations [Abstract]	'
Business Combinations	'
	BUSINESS COMBINATIONS
	On December 31, 2012, the Company, through a new Delaware subsidiary, Mirachem, LLC, purchased substantially all of the operating assets of Mirachem Corporation. Since 2004, Mirachem Corporation had provided the Company with cleaning chemistry used in the Company's aqueous parts cleaning service. The Company made an initial payment of approximately $2.5 million in cash at the time of closing and provided a note payable for an additional $0.8 million over two years. In a separate transaction, the Company acquired from a third party additional aqueous technologies in exchange for a 20% interest in Mirachem, LLC. The Company has an option to repurchase this 20% interest, and the holder of this 20% interest has a right to sell the interest to the Company after January 1, 2016, at a price based on the trailing EBITDA of Mirachem, LLC, subject to potential modifications. The Company completed these transactions in order to secure the supply of its aqueous parts cleaning chemistry which, together with the Company's patented aqueous parts cleaning equipment, should provide the Company with a strong platform from which to compete in the aqueous parts cleaning market.
	On June 26, 2013, the Company purchased substantially all of the operating assets of Recycling Fluid Technologies, Inc. ("RFTI"), which was based in Battle Creek, Michigan. RFTI's business consisted of collecting waste antifreeze and recycling the waste antifreeze, producing a line of high quality antifreeze products which were sold for use in vehicle engine applications. The Company purchased RFTI for $4.9 million in cash and $1.2 million of the Company's common stock, or 82,000 shares.
	On July 19, 2013, the Company purchased substantially all of the operating assets of Recycle Technologies, Inc. ("RTI"), which was based in Wood Dale, Illinois. RTI's business and operations were very similar to the business and operations of the former RFTI, which is described above. The Company purchased RTI for $2.9 million in cash at the time of closing, $0.4 million in the form of a note payable, and $1.0 million of the Company's common stock or 69,322 shares.
	The acquisitions of RFTI and RTI provide the Company with a presence in the antifreeze recycling market.
	On November 1, 2013, the Company acquired certain assets and liabilities of the northern territory of RS Used Oil Services, Inc., a subsidiary of Universal Lubricants, LLC ("ULNT/RS"), in exchange for $11.0 million in cash. The Company purchased these service routes in order to add used oil collection volume in Indiana, Ohio, Wisconsin, and parts of Illinois. The operating results of this acquisition are included in the Company's consolidated results of operations, as part of the Oil Business segment, from the date of the acquisition.
	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed, net of cash acquired, related to each acquisition (in thousands):
		Mirachem			RFTI (a)			RTI (a)			ULNT/RS (a)
	Accounts Receivable	$	—		$	348		$	136		$	—
	Other current assets	—			—			—			101
	Inventory	476			211			106			955
	Property, Plant, & Equipment	218			1,283			793			1,540
	Intangible Assets	2,710			1,590			1,340			6,274
	Goodwill	809			3,027			1,917			2,100
	Accounts Payable	(139		)	(91		)	—			—
	Non-controlling interest	(834		)	—			—			—
	Total purchase price, net of cash acquired	$	3,240		$	6,368		$	4,292		$	10,970
	Less: common stock issued	—			(1,230		)	(1,000		)	—
	Less:  note issued	(835		)	—			(430		)	—
	Working capital adjustment	—			(218		)	8			—
	Net cash paid	$	2,405		$	4,920		$	2,870		$	10,970
	_______________
	(a) The Company is continuing to evaluate the purchase price allocations. Preliminary purchase price allocations are tentative and subject to revision as the Company finalizes appraisals and other analyses. Final determination of the fair values may result in further adjustments to the values presented above.
	Subsequent to the closing date, the Company has consolidated each acquisition into its financial statements in fiscal 2013 and has included revenue of $5.2 million and pre-tax income of $0.4 million in its fiscal 2013 financial results. In fiscal 2013 the Company incurred $0.3 million in acquisition costs.
	Unaudited Pro Forma Financial Information
	The pro forma financial information in the table below presents the combined results of the Company as if the acquisitions that occurred in fiscal 2013 had occurred January 1, 2012 (in thousands, except per share data). The pro forma information is shown for illustrative purposes only and is not necessarily indicative of future results of operations of the Company or results of operations of the Company that would have actually occurred had the transactions been in effect for the periods presented. Nor is it intended to represent or be indicative of actual results had the acquisition occurred as of the beginning of each period. Additionally, certain one-time transaction expenses that are a direct result of the acquisitions have been excluded from years ended December 28, 2013 and December 29, 2012.
			Fiscal Year Ended,
			28-Dec-13			29-Dec-12
	Total Revenues		$	300,360		$	278,179
	Net Income		4,397			2,061
	Earnings per share
	Basic		$	0.25		$	0.13
	Diluted		$	0.24		$	0.12

Accounts_Receivable

Accounts Receivable	12 Months Ended
	Dec. 28, 2013
Receivables [Abstract]	'
Accounts Receivable	'
	ACCOUNTS RECEIVABLE
	Accounts receivable consisted of the following (in thousands):
		December 28,			December 29,
		2013			2012
	Trade	$	29,663		$	24,026
	Less: allowance for doubtful accounts	1,121			1,244
	Trade - net	28,542			22,782
	Related parties	2,045			410
	Other	585			146
	Total accounts receivable - net	$	31,172		$	23,338
	The following table provides the changes in the Company’s allowance for doubtful accounts for the fiscal year ended December 28, 2013 and the fiscal year ended December 29, 2012 (in thousands):
		Fiscal Year Ended,
		December 28,			December 29,
		2013			2012
	Balance at beginning of period	$	1,244		$	698
	Provision for bad debts	444			1,122
	Accounts written off, net of recoveries	(567		)	(576		)
	Balance at end of period	$	1,121		$	1,244

Inventory

Inventory	12 Months Ended
	Dec. 28, 2013
Inventory Disclosure [Abstract]	'
Inventory	'
	INVENTORY
	The carrying value of inventory consisted of the following (in thousands):
		December 28,			December 29,
		2013			2012
	Oil	$	12,733		$	11,549
	Solvents	7,990			10,076
	Machines	2,934			2,470
	Drums	2,008			1,859
	Other	1,859			1,518
	Total inventory	27,524			27,472
	Less: Machine refurbishing reserve	217			241
	Total inventory - net	$	27,307		$	27,231
	Inventory consists primarily of used oil, processed oil, catalyst, new and used solvents, new and refurbished parts cleaning machines, drums, and other items. Inventories are valued at the lower of first-in, first-out ("FIFO") cost or market, net of any reserves for excess, obsolete, or unsalable inventory. The Company continually monitors its inventory levels at each of its locations and evaluates inventories for excess or slow-moving items. If circumstances indicate the cost of inventories exceed their recoverable value, inventories are reduced to net realizable value.
	The following table provides the changes in the Company's machine refurbishing reserve related to inventory for fiscal years 2013 and 2012 (in thousands):
		Fiscal Year Ended,
		December 28, 2013			December 29, 2012
	Balance at beginning of period	$	241		$	159
	Net change in reserve	(24		)	82
	Balance at end of period	$	217		$	241

Property_Plant_and_Equipment

Property, Plant, and Equipment	12 Months Ended
	Dec. 28, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant, and Equipment	'
	PROPERTY, PLANT, AND EQUIPMENT
	Property, plant, and equipment consisted of the following (in thousands):
		December 28,			December 29,
		2013			2012
	Buildings and storage tanks (a)	$	53,106		$	45,813
	Machinery, vehicles, and equipment (a)	33,738			30,040
	Leasehold improvements (a)	2,875			3,180
	Land (a)	835			414
	Construction in progress	11,047			4,658
	Total property, plant, and equipment	101,601			84,105
	Less: accumulated depreciation	(16,485		)	(11,859		)
	Property, plant, and equipment - net	$	85,116		$	72,246
		December 28,			December 29,
		2013			2012
	Equipment at customers	$	47,078		$	41,884
	Less: accumulated depreciation	(27,720		)	(23,938		)
	Equipment at customers - net	$	19,358		$	17,946
	_______________
	(a) Fiscal 2013 numbers include preliminary fair values of assets acquired in the acquisitions described in Note 3 that may be adjusted as additional information becomes known.

Software_and_Other_Intangible_

Software and Other Intangible Assets	12 Months Ended
	Dec. 28, 2013
Software and other intangible assets [Abstract]	'
Software and Other Intangible Assets	'
	SOFTWARE AND OTHER INTANGIBLE ASSETS
	Following is a summary of software and other intangible assets (in thousands):
		28-Dec-13						29-Dec-12
		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	Customer & supplier relationships(a)	$	10,489	$	826	$	9,663	$	1,729	$	274	$	1,455
	Non-compete agreements(a)	2,794		713		2,081		777		510		267
	Software	4,799		2,815		1,984		4,296		2,635		1,661
	Patents, formulae, and licenses(a)	1,825		370		1,455		1,059		262		797
	Other	1,008		137		871		539		164		375
	Total software and intangible assets	$	20,915	$	4,861	$	16,054	$	8,400	$	3,845	$	4,555
	_______________
	(a) Fiscal 2013 numbers include preliminary fair values of assets acquired in the acquisitions described in Note 3 that may be adjusted as additional information becomes known.
	Amortization expense was $1.1 million, $0.7 million, and $0.6 million for fiscal 2013, 2012, and 2011, respectively. The weighted average useful lives of software; customer and supplier relationships; patents, formulae, and licenses; non-compete agreements, and other intangibles were 10 years, 12 years, 15 years, 5 years, and 8 years, respectively.
	The expected amortization expense for fiscal years 2014, 2015, 2016, 2017, and 2018 is $1.9 million, $1.8 million, $1.6 million, $1.5 million, and $1.4 million, respectively. The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, disposal of intangible assets, accelerated amortization of intangible assets, adjustment to purchase price allocations for assets acquired, and other events.

Accounts_Payable

Accounts Payable	12 Months Ended
	Dec. 28, 2013
Accounts Payable [Abstract]	'
Accounts Payable	'
	ACCOUNTS PAYABLE
	Accounts payable consisted of the following (in thousands):
		December 28,		December 29,
		2013		2012
	Accounts payable	$	17,908	$	16,202
	Accounts payable - related parties	383		307
	Total accounts payable	$	18,291	$	16,509

Debt_an_Financing_Arrangements

Debt an Financing Arrangements	12 Months Ended
	Dec. 28, 2013
Debt Disclosure [Abstract]	'
Debt Disclosure	'
	DEBT AND FINANCING ARRANGEMENTS
	Bank Credit Facility
	On February 5, 2013, the Company entered into an Amended and Restated Credit Agreement ("Credit Agreement"). The Credit Agreement provides for borrowings of up to $40.0 million, with an accordion feature that provides for additional borrowings of up to $60.0 million for a total of up to $100.0 million available under the Credit Agreement, subject to the satisfaction of certain terms and conditions. The actual amount available under the revolving loan portion of the Credit Agreement is limited by the Company's total leverage ratio. The amount available to draw at any point in time would be further reduced by any standby letters of credit issued.
	Loans made under the Credit Agreement may be Base Rate Loans or LIBOR Rate Loans, at the election of the Company subject to certain exceptions. Base Rate Loans have an interest rate equal to (i) the higher of (a) the federal funds rate plus 0.5%, (b) the British Bankers Association LIBOR rate plus 1%, or (c) the Lender's prime rate, plus (ii) a variable margin of between 0.75% and 1.75% depending on the Company's total leverage ratio, calculated on a consolidated basis. LIBOR rate loans have an interest rate equal to the (i) British Bankers Association LIBOR Rate plus (ii) a variable margin of between 1.75% and 2.75% depending on the Company's total leverage ratio. Amounts borrowed under the Credit Agreement are secured by a security interest in substantially all of the Company's tangible and intangible assets.
	The Credit Agreement requires the Company to consult with the bank on certain acquisitions and includes a prohibition on the payment of dividends. It also contains a number of financial covenants that are based on EBITDA for the trailing fiscal year, including a maximum total leverage ratio of 3.25 through fiscal 2013, a maximum total leverage ratio of 3.0 through fiscal 2014, and a minimum interest coverage ratio of 3.5. In addition, it limits capital expenditures each fiscal year to 1.5 times depreciation and amortization expense, with the certain exceptions for expanding the Company's used oil re-refining capacity
	The Company's secured bank credit facility as of December 28, 2013 allowed for up to $39.0 million in borrowings. As of December 28, 2013 and December 29, 2012, the Company's total borrowings were $19.3 million and $19.5 million, respectively, under the term loan having a maturity date of February 5, 2018. The remaining portion of the credit facility was a revolving loan which was to expire on February 5, 2018 under which up to an additional $19.7 million was available. There were no amounts outstanding under the revolver at December 28, 2013 and December 29, 2012.
	As of December 28, 2013 and December 29, 2012, the Company was in compliance with all covenants under the credit facility then in effect. As of December 28, 2013, and December 29, 2012, the Company had $0.3 million and $0.3 million of standby letters of credit issued, respectively, and $19.7 million and $19.7 million was available for borrowing under the then effective bank credit facility, respectively.
	During 2013, the Company recorded interest of $0.5 million on the term loan, of which $0.1 million was capitalized for various capital projects.
	The Company's weighted average interest rate as of December 28, 2013, December 29, 2012, and December 31, 2011 was 2.45%, 2.75%, and 2.49%, respectively. The Company's effective interest rate as of December 28, 2013, December 29, 2012, and December 31, 2011 was 2.54% and 2.88%, and 2.34% respectively.
	Notes Payable
	At December 28, 2013 and December 29, 2012, the Company has outstanding notes payable related to various acquisitions of approximately $1.7 million and $1.4 million, of which $1.2 million and $0.6 million, respectively, were recorded as current maturities.
	Future Maturities
	The aggregate contractual annual maturities for debt as of December 28, 2013 are as follows (in thousands):
	Fiscal Year:	Notes Payable			Term Loan		Total
	2014	$	1,156		$	1,750	$	2,906
	2015	623			1,500		2,123
	2016	—			2,000		2,000
	2017	—			1,500		1,500
	2018	—			12,500		12,500
	Thereafter	—			—		—
	Total debt	$	1,779		$	19,250	$	21,029
	Less: Unamortized discount	(71		)	—		(71		)
	Net debt	$	1,708		$	19,250	$	20,958

Employee_Benefits

Employee Benefits	12 Months Ended
	Dec. 28, 2013
Employee Benefits [Abstract]	'
Employee Benefits	'
	EMPLOYEE BENEFIT PLAN
	The Company offers a defined contribution benefit plan for its employees. All regular employees who have completed at least one hour of service are eligible to participate in the plan. Participants are allowed to contribute 1% to 70% of their pre-tax earnings to the plan. The Company matches 100% of the first 3% contributed by the participant and 50% of the next 2% contributed by the participant for a maximum contribution of 4% per participant. The Company's matching contribution was $1.0 million, $1.0 million, and $0.8 million in fiscal 2013, 2012, and 2011, respectively. In fiscal 2011 the Company eliminated the profit-sharing component of the plan. No profit-sharing contributions pursuant to this plan were declared or paid in fiscal 2011.

Related_Party_and_Affiliated_T

Related Party and Affiliated Transactions	12 Months Ended
	Dec. 28, 2013
Related Party and Affiliate Transactions [Abstract]	'
Related Party and Affiliated Transactions	'
	RELATED PARTY AND AFFILIATE TRANSACTIONS
	During fiscal 2013, 2012, and 2011, the Company had transactions with affiliates and other related parties. The following table sets forth related-party transactions (in thousands):
		Fiscal 2013				Fiscal 2012				Fiscal 2011
		Revenues		Expenses		Revenues		Expenses		Revenues		Expenses
	Heritage Group affiliates	$	10,421	$	3,474	$	7,662	$	4,876	$	2,105	$	2,259
	Other related parties / affiliates	4,875		4,633		5,829		3,926		33		2,558
	Total	$	15,296	$	8,107	$	13,491	$	8,802	$	2,138	$	4,817
	Revenues from related parties and affiliates are for sales of products and services performed by the Company. The increase in related party revenues from fiscal 2011 to fiscal 2013 was a result of increased capacity at the Company's used oil re-refinery, which led to increased revenues from the sale of re-refined base oil and by-products to affiliated oil companies.
	As of December 28, 2013, the Heritage Group beneficially owned 26.0% of the Company's common stock, the Fehsenfeld Family Trusts, which are related to the Heritage Group owned 7.8% of the Company's common stock, and Fred Fehsenfeld, Jr., the Chairman of the Board and an affiliate of the Heritage Group, beneficially owned 5.5% of the Company's common stock. Companies affiliated with the Heritage Group are listed as affiliates.
	In fiscal 2011, the Company acquired certain assets of Crystal Flash in exchange for $1.7 million in cash at the time of closing and $2.1 million in future payments which will be tied to the continued performance of the acquired business and were initially recorded at their net present value, which was $1.6 million. As of December 28, 2013, the net present value of the future payments was $0.6 million. Crystal Flash was considered a related party prior to the acquisition. In fiscal 2013, the Company made payments of $0.6 million related to the contingent consideration from the acquisition.
	Payments to related parties and affiliates include solvent purchases, insurance premiums, disposal services, transportation, and various administration services.
	The Company participates in a self-insurance program for workers' compensation with a shareholder and several related companies. In connection with this program, payments are made to the shareholder. Expenses paid in fiscal 2013, 2012, and 2011 were approximately $0.9 million, $0.8 million, and $0.4 million, respectively.

Segment_Information

Segment Information	12 Months Ended
	Dec. 28, 2013
SEGMENT INFORMATION [Abstract]	'
Segment Information	'
	SEGMENT INFORMATION
	The Company reports in two segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists of the Company's parts cleaning, containerized waste management, vacuum truck services, and used antifreeze recycling activities. The Oil Business segment consists of the Company's used oil collection and used oil re-refining activities. No single customer accounted for more than 10% of consolidated revenues in fiscal 2013 and fiscal 2012. Revenues from one customer in the Oil Business segment represented approximately 15.4% of the Company's consolidated revenues for fiscal 2011. No customer represented greater than 10% of consolidated revenues in the Environmental Services segment for fiscal 2013, 2012, or 2011. There were no intersegment revenues.
	Operating segment results for the fiscal years ended December 28, 2013, December 29, 2012, and December 31, 2011 were as follows (in thousands):
	For the Fiscal Years Ended,
	December 28, 2013
				Environmental		Oil Business			Corporate and			Consolidated
				Services					Eliminations
	Revenues
		Product revenues		$	14,449	$	117,960		$	—		$	132,409
		Service revenues		142,833		7,894						150,727
	Total revenues			$	157,282	$	125,854		$	—		$	283,136
	Operating expenses
		Operating costs		110,459		124,179			—			234,638
		Operating depreciation and amortization		4,937		3,364			—			8,301
	Profit (loss) before corporate selling, general, and administrative expenses			$	41,886	$	(1,689	)	$	—		$	40,197
	Selling, general, and administrative expenses								30,274			30,274
	Depreciation and amortization from SG&A								1,223			1,223
	Total selling, general, and administrative expenses								$	31,497		$	31,497
	Other expense - net								210			210
	Operating income											8,490
	Interest expense - net								417			417
	Income before income taxes											$	8,073
	29-Dec-12
				Environmental		Oil Business			Corporate and			Consolidated
				Services					Eliminations
	Revenues
		Product revenues		$	11,025	$	108,445		$	—		$	119,470
		Service revenues		128,129		4,892						133,021
	Total revenues			$	139,154	$	113,337		$	—		$	252,491
	Operating expenses
		Operating costs		104,994		108,574			—			213,568
		Operating depreciation and amortization		4,615		2,894			—			7,509
	Profit before corporate selling, general, and administrative expenses			$	29,545	$	1,869		$	—		$	31,414
	Selling, general, and administrative expenses								26,194			26,194
	Depreciation and amortization from SG&A								632			632
	Total selling, general, and administrative expenses								$	26,826		$	26,826
	Other expense - net								6			6
	Operating income											4,582
	Interest expense - net								585			585
	Income before income taxes											$	3,997
	31-Dec-11
				Environmental		Oil Business			Corporate and			Consolidated
				Services					Eliminations
	Revenues
		Product revenues		$	9,064	$	30,085		$	—		$	39,149
		Service revenues		110,448		3,261						113,709
	Total revenues			$	119,512	$	33,346		$	—		$	152,858
	Operating expenses
		Operating costs		90,751		33,249			—			124,000
		Operating depreciation and amortization		4,218		805			—			5,023
	Profit (loss) before corporate selling, general, and administrative expenses			$	24,543	$	(708	)	$	—		$	23,835
	Selling, general, and administrative expenses								20,715			20,715
	Depreciation and amortization from SG&A								634			634
	Total selling, general, and administrative expenses								$	21,349		$	21,349
	Other income - net								(10		)	(10		)
	Operating income											2,496
	Interest expense - net								37			37
	Income before income taxes											$	2,459
	Total assets by segment as of December 28, 2013 and December 29, 2012 were as follows (in thousands):
				December 28, 2013		December 29, 2012
	Total Assets:
		Environmental Services		$	80,451	$	57,092
		Oil Business		110,040		87,222
	Unallocated Corporate Assets		25,467		54,797
		Total	$	215,958	$	199,111
Segment assets for the Environmental Services and Oil Business segments consist of property, plant, and equipment, intangible assets, goodwill, accounts receivable, and inventories allocated to each segment. Assets for the corporate unallocated amounts consist of property, plant, and equipment used at the corporate headquarters, as well as cash and net deferred tax assets.
Total capital expenditures by segment for fiscal 2013, 2012, and 2011 were as follows (in thousands):
			For the Fiscal Year Ended,
			December 28, 2013		29-Dec-12			31-Dec-11
Total Capital Expenditures:
	Environmental Services		$	18,882	$	5,924		$	5,898
	Oil Business		20,549		15,225			37,903
	Unallocated Corporate Assets		138		1,907			1,814
		Total	$	39,569	$	23,056		$	45,615

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 28, 2013
COMMITMENTS AND CONTINGENCIES [Abstract]	'
Commitments and Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	The Company may enter into purchase obligations with certain vendors. They represent expected payments to third party service providers and other commitments entered into during the normal course of our business. These purchase obligations are generally cancelable with or without notice without penalty, although certain vendor agreements provide for cancellation fees or penalties depending on the terms of the contract.
	The Company had purchase obligations in the form of open purchase orders of $16.7 million as of December 28, 2013, primarily for used oil, solvent, machine purchases, disposal and transportation expenses, and capital expenditures.
	The Company may be subject to investigations, claims, or lawsuits as a result of operating its business, including matters governed by environmental laws and regulations.  When claims are asserted, the Company evaluates the likelihood that a loss will occur and records a liability for those instances when the likelihood is deemed probable and the exposure is reasonably estimable.  The Company carries insurance at levels it believes are adequate to cover loss contingencies based on historical claims activity.  When the potential loss exposure is limited to the insurance deductible and the likelihood of loss is determined to be probable, the Company accrues for the amount of the required deductible, unless a lower amount of exposure is estimated. As of December 28, 2013 and December 29, 2012, the Company had accrued $0.4 million and $0.2 million related to loss contingencies, respectively.
	The Company leases office space, equipment and vehicles under noncancelable operating leases that expire at various dates through 2026. Many of the building leases obligate the Company to pay real estate taxes, insurance, and certain maintenance costs and contain multiple renewal provisions, exercisable at the Company's option. Leases that contain predetermined fixed escalations of the minimum rentals are recognized in rental expense on a straight-line basis over the lease term. Rental expense under operating leases was approximately $20.4 million, $17.4 million, and $12.2 million for fiscal years 2013, 2012, and 2011, respectively.
	Future minimum lease payments under noncancelable operating leases as of December 28, 2013 are as follows (in thousands):
	Fiscal year:
	2014	$	16,141
	2015	14,345
	2016	12,190
	2017	10,989
	2018	9,703
	Thereafter	12,034
	Total	$	75,402

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 28, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	In fiscal 2011, the Company deducted for federal income tax purposes bonus depreciation on the majority of its capital expenditures for assets placed in service in fiscal 2011. The Company recorded a noncurrent deferred tax liability to reflect the book-tax difference for the resulting inability to deduct the federal income tax depreciation on 2011 capital expenditures in future years. In addition, as a result of the temporary differences related to the tax treatment of the federal bonus depreciation, the Company recorded a gross Net Operating Loss ("NOL") of $44.7 million, which will expire in 2031. The balance remaining on the NOL as of December 28, 2013 was $33.6 million. As of December 28, 2013, the remaining deferred tax asset related to the Company's state and federal NOL was a tax effected balance of $12.1 million.
	The Company recognizes windfall tax benefits associated with the exercise of stock options directly to stockholders' equity only when realized. Consequently, deferred tax assets are not recognized for NOLs resulting from windfall tax benefits. At December 28, 2013, deferred tax assets do not include $0.8 million of excess tax benefits from share-based compensation.
	The Company's effective tax rate for fiscal 2013 was 42.5% compared to 43.6% in fiscal 2012. The decrease in the effective tax rate was, in part, due to certain true ups that were recorded in fiscal 2012 that increased the 2012 effective tax rate.
	Components of the Company's income tax benefit and provision consist of the following for fiscal years 2013, 2012, and 2011 (in thousands):
		For the Fiscal Years Ended,
		28-Dec-13			29-Dec-12			31-Dec-11
	Current:
	Federal	$	21		$	127		$	(1,643	)
	State	171			338			(147		)
	Total current	$	192		$	465		$	(1,790	)
	Deferred:
	Federal	$	2,679		$	1,443		$	2,604
	State	557			(165		)	171
	Total deferred	$	3,236		$	1,278		$	2,775
	Income tax provision	$	3,428		$	1,743		$	985
	A reconciliation of the expected income taxes at the statutory federal rate to the Company's actual income taxes is as follows (in thousands):
		For the Fiscal Years Ended,
		December 28, 2013			29-Dec-12
	Tax at statutory federal rate	$	2,745		$	1,359
	State and local tax, net of federal benefit	508			257
	Other	175			127
	Total income tax provision	$	3,428		$	1,743
	Components of deferred tax assets (liabilities) are as follows (in thousands):
		As of,
		December 28, 2013			29-Dec-12
	Deferred tax assets:
	Net operating loss carryforward	$	12,073		$	13,662
	Stock compensation	1,573			1,448
	Tax intangible assets	1,355			1,526
	Reserves and accruals	1,202			698
	Income tax credits	706			574
	Allowance for doubtful accounts	463			496
	Total deferred tax asset	$	17,372		$	18,404
	Deferred tax liabilities:
	Prepaids	$	(602	)	$	(471	)
	Depreciation and amortization	(25,004		)	(22,931		)
	Total deferred tax liability	(25,606		)	(23,402		)
	Net deferred tax liability	$	(8,234	)	$	(4,998	)
	Net current deferred tax asset	1,004			759
	Net non-current deferred tax liability	(9,238		)	(5,757		)
	Net deferred tax liability	$	(8,234	)	$	(4,998	)
	As of December 28, 2013, the Company is no longer subject to U.S. federal examinations by taxing authorities for years prior to 2009. Federal and state income tax returns for fiscal years 2009 through 2013 are still open for examination.
	The Company establishes reserves when it is more likely than not that the Company will not realize the full tax benefit of a position. The Company had a reserve of $0.3 million and $0.2 million for uncertain tax positions as of December 28, 2013 and December 29, 2012, respectively. The gross unrecognized tax benefits would, if recognized, decrease the Company's effective tax rate.
	The following table summarizes the movement in unrecognized tax benefits (in thousands):
		For the Fiscal Years Ended,
		28-Dec-13			29-Dec-12
	Gross Unrecognized Tax Benefits:
	Beginning Balance	$	194		$	—
	Additions Based on Current Year's Tax Positions	30			19
	Additions from Prior Year's Tax Positions	49			175
	Ending Balance	$	273		$	194

Sharebased_Compensation

Share-based Compensation	12 Months Ended
	Dec. 28, 2013
Share-based Compensation [Abstract]	'
Share-based Compensation	'
	SHARE-BASED COMPENSATION
	The aggregate number of shares of common stock which may be issued under the Company’s 2008 Omnibus Plan ("Plan") is 1,902,077 plus any common stock that becomes available for issuance pursuant to the reusage provision of the Plan.  As of December 28, 2013, the number of shares available for issuance under the Plan was 777,842 shares.
	Stock Option Awards
	A summary of stock option activity under this Plan is as follows:
	Stock Options	Number of			Weighted Average			Weighted Average	Aggregate
		Options			Exercise Price			Remaining	Intrinsic Value as of Date Listed
		Outstanding						Contractual Term	(in thousands)
								(in years)
	Options outstanding at December 31, 2011	771,337			$	10.83		6.38	$	4,421
	Exercised	(142,289	)		$	11.15
	Options outstanding at December 29, 2012	629,048			$	10.76		5.4	$	2,607
	Exercised	(49,434	)		$	8.06
	Options outstanding at December 28, 2013	579,614			$	10.98		4.35	$	5,133
	Stock Options Vested	Number of Options			Grant-Date Fair Value
	Nonvested stock options at December 31, 2011	78,805			$	3.24
	Less: Shares vested during period	(39,402	)		3.24
	Nonvested stock options at December 29, 2012	39,403			$	3.24
	Less: Shares vested during period	(39,403	)		3.24
	Nonvested stock options at December 28, 2013	—
	The Company estimates the fair value of stock options granted using the Black-Scholes-Merton option-pricing model.  This fair value is then amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period.
	Assumptions used in the Black-Scholes-Merton option pricing model for granted options follow:
		$3.24 per option granted in March 2009
	Expected volatility	41.6	%
	Risk-free interest rate	2.4	%
	Dividend yield	—
	Expected life	6.25		years
	The stock options issued on March 25, 2009, vested equally over four years beginning on the first anniversary following the grant date and completed vesting on March 25, 2013. In fiscal 2013, less than $0.1 million was recorded as expense related to the stock options, and in both fiscal 2012 and 2011, $0.1 million was recorded as expense related to these stock options.
	Restricted Stock Compensation/Awards
	Annually, the Company grants restricted shares to its Board of Directors. The shares become fully vested one year from their grant date. The fair value of each restricted stock grant is based on the closing price of the Company's stock on the date of grant. The Company amortizes the expense over the service period, which is the fiscal year in which the award is granted. On May 3, 2013, the Company granted 18,666 restricted shares for service in fiscal 2013. Expense related to the Board of Directors' restricted stock in fiscal 2013, 2012, and 2011 was $0.3 million, $0.3 million, and $0.2 million, respectively. The 11,493 shares that were granted to the Board in fiscal 2012 vested on May 4, 2013.
	In March 2011, the Company granted 92,909 restricted shares to certain members of management under the Company's 2010 Long Term Incentive Plan ("LTIP").  These restricted shares are subject to a graded vesting schedule over a three year period starting January 1, 2012.  In addition to the shares awarded in March 2011, in October 2011, the Company granted 12,783 restricted shares based on the completion of the front part of the used oil re-refinery. These awards were fully vested as of January 1, 2014. As of December 28, 2013 there was less than $0.1 million of unrecognized compensation expense related to these awards. As of December 29, 2012, there was approximately $0.4 million of unrecognized compensation expense related to these awards. The Company continues to record compensation expense through the vesting period of these awards. In fiscal 2013, 2012, and 2011, approximately $0.4 million, $0.3 million, and $0.4 million was recorded as expense related to these awards, respectively. These awards became fully vested on January 1, 2014.
	In February 2012, the Company granted 59,502 restricted shares to certain members of management under the Company's 2011 LTIP. These restricted shares are subject to a graded vesting schedule over a three year period starting January 1, 2013. There was approximately $0.3 million and $0.7 million of unrecognized compensation expense remaining related to these awards as of December 28, 2013 and December 29, 2012, respectively. In fiscal 2013, 2012, and 2011, $0.3 million, $0.3 million, and $0.3 million of compensation expense was recorded related to these awards, respectively.
	On February 7, 2013, the Company granted 10,000 restricted shares to a member of management based on performance goals achieved in fiscal 2012 by the individual. The restricted shares are subject to a graded vesting schedule over a three year period. There was approximately $0.1 million of unrecognized compensation expense remaining related to this award as of December 28, 2013 and December 29, 2012. In each of fiscal 2013 and 2012, less than $0.1 million of compensation expense was recorded related to this award, respectively.
	In February 2013, as part of management's annual compensation for fiscal 2013, the Company approved a plan to grant certain members of management restricted shares in the future based on the Company's performance in fiscal 2013. Based on the relevant guidance, the Company determined that the service inception date for these awards was prior to the grant date and therefore began accruing compensation expense in fiscal 2013, based on the Company's assessment as to the probability that the performance criteria would be achieved. As such, there was approximately $1.7 million in unrecognized compensation expense remaining related to these awards as of December 28, 2013. In fiscal 2013, $0.6 million of compensation expense was recorded related to these awards.
	The following table summarizes information about restricted stock awards for the periods ended December 29, 2012 and December 28, 2013:
	Restricted Stock (Nonvested Shares)		Number of Shares			Weighted Average Grant-Date Fair Value Per Share
	Nonvested shares outstanding at December 31, 2011		114,038			$	12.82
	Granted		73,032			21.74
	Vested		(45,599	)		13.8
	Forfeited		(202	)		16.53
	Nonvested shares outstanding at December 29, 2012		141,269			$	17.11
	Granted		28,666			15.26
	Vested		(69,782	)		16.55
	Forfeited		(101	)		16.53
	Nonvested shares outstanding at December 28, 2013		100,052			$	16.97
	Performance Restricted Stock Awards
	In February 2007, the Company granted to certain key employees in one of the Company’s operating divisions 55,000 restricted stock awards. In May 2013, the final 11,000 shares from this award vested. In fiscal 2013 less than $0.1 million of compensation expense related to these awards was recorded.
	Employee Stock Purchase Plan
	The Employee Stock Purchase Plan of 2008 ("ESPP") is a shareholder approved plan under which all employees regularly scheduled to work 20 or more hours per week may purchase the Company’s common stock through payroll deductions at a price equal to 95% of the fair market values of the stock as of the end of the first day following each three-month offering period. An employee’s payroll deductions under the ESPP are limited to 10% of the employee’s regular earnings, and employees may not purchase more than $25,000 of stock during any calendar year.
	As of December 28, 2013, the Company had reserved 39,207 shares of common stock available for purchase under the ESPP. In fiscal 2013, employees purchased 29,350 shares of the Company’s common stock with a weighted average fair market value of $15.75 per share.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 28, 2013
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	STOCKHOLDERS' EQUITY
	On June 26, 2013, the Company purchased substantially all of the operating assets of Recycling Fluid Technologies, Inc. ("RFTI"), for $4.9 million in cash and $1.2 million of the Company's common stock, or 82,000 shares. On July 19, 2013, the Company purchased substantially all of the operating assets of Recycle Technologies, Inc. ("RTI"), for $2.9 million in cash at the time of closing, $0.4 million in the form of a note payable, and $1.0 million of the Company's common stock or 69,322 shares. For more information on these acquisitions, see Note 3 included elsewhere in this document.
	In the second quarter of fiscal 2012, the Company completed a follow-on public offering of common stock. In the follow-on offering, the Company sold 3,400,000 additional shares of common stock at $20.50, raising net proceeds of approximately $65.5 million, after underwriting discounts and transaction costs. The Company used a portion of the net proceeds to pay off the outstanding balance of its revolving credit facility of approximately $12.4 million.
	Heritage Participation Rights
	The Company has a Participation Rights Agreement with The Heritage Group (“Heritage”), an affiliate of Heritage-Crystal Clean, Inc. pursuant to which Heritage has the option to participate, pro rata based on its percentage ownership interest in the Company's common stock in any equity offerings for cash consideration, including (i) contracts with parties for equity financing (including any debt financing with an equity component) and (ii) issuances of equity securities or securities convertible, exchangeable or exercisable into or for equity securities (including debt securities with an equity component). If Heritage exercises its rights with respect to all offerings, it will be able to maintain its percentage ownership interest in the Company's common stock. The Participation Rights Agreement does not have an expiration date. Heritage is not required to participate or exercise its right of participation with respect to any offerings. Heritage's right to participate does not apply to certain offerings of securities that are not conducted to raise or obtain equity capital or cash such as stock issued as consideration in a merger or consolidation, in connection with strategic partnerships or joint ventures, or for the acquisition of a business, product, license, or other asset by the Company.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 28, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	EARNINGS PER SHARE
	The following table reconciles the number of shares outstanding for fiscal 2013, 2012, and 2011 respectively, to the number of weighted average basic shares outstanding and the number of weighted average diluted shares outstanding for the purposes of calculating basic and diluted earnings per share (in thousands, except per share data):
		For the Fiscal Years Ended,
		December 28, 2013		December 29, 2012		31-Dec-11
	Net income	$	4,645	$	2,254	$	1,474
	Less: Income attributable to noncontrolling interest	100		—		—
	Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$	4,545	$	2,254	$	1,474
	Weighted average basic shares outstanding	18,224		16,921		14,313
	Dilutive shares for share–based compensation plans	328		442		397
	Weighted average diluted shares outstanding	18,552		17,363		14,710
	Net income per share: basic	$	0.25	$	0.13	$	0.1
	Net income per share: diluted	$	0.24	$	0.13	$	0.1

Selected_Quarterly_Financial_D

Selected Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 28, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Selected Quarterly Financial Data (Unaudited)	'
	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)
			Fiscal 2013										Fiscal 2012
			First			Second		Third		Fourth			First		Second		Third		Fourth
			Quarter			Quarter		Quarter		Quarter (a)			Quarter		Quarter		Quarter		Quarter (a)
			(In thousands except per share data)
	STATEMENT OF
	OPERATIONS DATA:
	Revenues
	Product revenues		$	26,558		$	28,906	$	32,302	$	44,643		$	21,215	$	31,941	$	31,348	$	34,966
	Service revenues		33,449			34,644		35,301		47,333			29,294		30,330		30,718		42,679
	Total Revenues		$	60,007		$	63,550	$	67,603	$	91,976		$	50,509	$	62,271	$	62,066	$	77,645
	Operating expenses -
	Operating Costs		$	52,286		$	52,201	$	55,698	$	74,453		$	42,337	$	51,908	$	52,718	$	66,605
	Selling, general, and administrative expenses		6,591			7,049		7,051		9,583			5,756		6,235		5,566		8,637
	Depreciation and amortization		1,859			2,163		2,224		3,278			1,772		1,911		1,904		2,554
	Other expense (income)		(8		)	101		138		(21		)	1		—		9		(4		)
	Operating income (loss)		(721		)	2,036		2,492		4,683			643		2,217		1,869		(147		)
	Interest expense – net		106			107		97		107			187		146		112		140
	Income (loss) before income taxes		$	(827	)	$	1,929	$	2,395	$	4,576		$	456	$	2,071	$	1,757	$	(287	)
	Provision for (benefit from) income taxes		(407		)	872		1,061		1,902			186		853		723		(19		)
	Net income (loss)		(420		)	1,057		1,334		2,674			270		1,218		1,034		(268		)
	Less: Income attributable to noncontrolling interest		20			26		26		28			—		—		—		—
	Net income (loss) attributable to Heritage-Crystal Clean, Inc. common stockholders		$	(440	)	$	1,031	$	1,308	$	2,646		$	270	$	1,218	$	1,034	$	(268	)
	Net income per share: basic		(0.02		)	0.06		0.07		0.15			0.02		0.07		0.06		(0.01		)
	Net income per share: diluted		(0.02		)	0.06		0.07		0.14			0.02		0.07		0.06		(0.01		)
	Number of weighted average
	common shares outstanding:
	Basic		18,113			18,138		18,272		18,335			14,486		16,689		18,060		18,067
	Diluted		18,113			18,456		18,585		18,677			14,962		17,140		18,412		18,067
	OTHER OPERATING DATA:
	Average revenues per working day - Environmental Services		$	580		$	600	$	625	$	650		$	515	$	545	$	555	$	570
	____________
	(a)	Reflects a sixteen week quarter.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 28, 2013
Accounting Policies [Abstract]	'
Fiscal Period	'
	The Company’s fiscal year ends on the Saturday closest to December 31.  The most recent fiscal year ended on December 28, 2013.  Each of the Company's first three fiscal quarters consists of twelve weeks while the last fiscal quarter consists of sixteen or seventeen weeks.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with Generally Accepted Accounting Principles ("GAAP") requires the use of certain estimates by management in determining the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of sales and expenses during the reporting period.  Significant items subject to such estimates and assumptions are the allowance for doubtful accounts receivable, valuation of inventory at lower of cost or market, valuation of goodwill and other intangible assets, and income taxes.  Actual results could differ from those estimates.
Revenue Recognition	'
	Revenue Recognition
	The Company derives its revenues primarily from the services it performs and from the sale of processed oil from its used oil re-refinery. Parts cleaning and other service revenues are recognized as the service is performed. Product revenues are recognized at the time risk of loss passes to the customer. The risk of loss passes to customers at various times depending on the particular terms of the sales agreement in force with each individual customer. Common thresholds for when risk of loss passes to the customer are at the time that product is loaded onto the shipping vessel or at the time that product is offloaded at the customer’s receiving location. Revenues are recognized only if collection of the relevant receivable is probable, persuasive evidence of an arrangement exists, and the sales price is fixed or determinable.
Sales Tax	'
	Sales Tax
	Amounts billed for sales tax, value added tax, or other transactional taxes imposed on revenue producing transactions are presented on a net basis and are not recognized as revenue.
Operating Costs	'
	Operating Costs
	Within operating costs are cost of sales. Cost of sales in the Environmental Services segment includes the costs of the materials the Company sells and provides in its services, such as solvents and other chemicals, transportation of inventory and waste, and payments to third parties to recycle or dispose of the waste materials that the Company collects. Parts cleaning machines are either sold to a customer or continue to be owned by the Company but placed offsite at a customer location to be used in parts cleaning services. When sold to a customer, machines are removed from inventory, and the costs are recognized under operating costs. The used solvent that the Company retrieves from customers in its product reuse program is accounted for as a reduction in net cost of solvent under cost of sales, whether placed in inventory or sold to a purchaser for reuse. If the used solvent is placed in inventory it is recorded at lower of cost or net realizable value. Cost of sales in the Oil Business include the costs paid to customers for used oil, transportation out to customers, and costs to operate the used oil re-refinery, including personnel costs and utilities.
	Operating costs also include the Company's costs of operating its branch system and hubs. These costs include personnel costs (including commissions), facility rent and utilities, truck leases, fuel, transportation, and maintenance. Operating costs are not presented separately for products and services.
Selling, General and Administrative Expenses	'
	Selling, General, and Administrative Expenses
	Selling, general, and administrative expenses include costs of performing centralized business functions, including sales management at or above the regional level, billing, receivables management, accounting and finance, information technology, environmental health and safety, and legal.
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	The Company considers investments in highly liquid debt instruments, purchased with an original maturity of ninety days or less, to be cash equivalents.
Concentration Risk	'
	Concentration Risk
	The Company maintains its cash in bank deposit accounts at financial institutions that are insured by the Federal Deposit Insurance Corporation ("FDIC"). Cash balances may exceed FDIC limits. The Company has not experienced any losses in such accounts. The Company has a broad customer base and believes it is not exposed to any significant concentration of credit risk.
Accounts Receivable	'
	Accounts Receivable
	Trade accounts receivable represent amounts due from customers. The allowance for doubtful accounts is the Company's best estimate of the amount of probable credit losses in the Company's existing accounts receivable. The Company determines the allowance based on analysis of customer credit worthiness, historical losses, and general economic trends and conditions. Accounts receivable are written off once the Company determines the account uncollectible. The Company does not have any off-balance-sheet credit exposure related to its customers.
Inventory	'
	Inventory
	Inventory consists primarily of used oil, processed oil, catalyst, new and used solvents, new and refurbished parts cleaning machines, new and used antifreeze products, drums, and other items. Inventories are valued at the lower of first-in, first-out ("FIFO") cost or market, net of any reserves for excess, obsolete, or unsalable inventory. The Company performs a physical inventory count on a periodic basis and uses the results of these counts to determine inventory quantities. These quantities are used to help determine the value of the inventory.
	Processed oil inventory consists of the costs of feedstock, transportation, labor, conversion costs, and re-refining overhead costs incurred in bringing the inventory to its existing condition and location. Fixed production overhead costs are capitalized in processed oil inventory based on the normal capacity of the production facility. In periods of abnormal production levels, excess overhead costs are recognized as expense in the period they are incurred.
	The Company continually monitors its inventory levels at each of its distribution locations and evaluates inventories for excess or slow-moving items. If circumstances indicate the cost of inventories exceed their recoverable value, inventories are reduced to net realizable value.
Prepaid and Other Current Assets	'
	Prepaid and Other Current Assets
	Prepaid and other current assets include insurance and vehicle license contract costs, which are expensed over the term of the underlying contract.
Property, Plant and Equipment	'
	Property, Plant, and Equipment
	Property, plant, and equipment are stated at cost. Expenditures for major renewals and betterments are capitalized, while expenditures for repair and maintenance charges are expensed as incurred. Property, plant, & equipment acquired in business combinations is stated at fair value as of the date of the acquisition.
	Depreciation of property, plant, and equipment is calculated using the straight-line method over the estimated useful lives of the assets. The estimated useful lives of buildings and storage tanks range from 10 to 39 years. The estimated useful lives of machinery, vehicles, and equipment range from 3 to 25 years. Leasehold improvements are amortized over the shorter of the lease terms or five years using the straight-line method.
	The Company capitalizes interest on borrowings during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets. The interest rate used to capitalize interest is based upon the borrowing rate on the Company's bank debt outstanding. In fiscal 2013, 2012, and 2011, the Company capitalized interest of $0.1 million, $0.1 million, and $0.2 million, respectively, for capital projects.
Equipment at Customers	'
	Equipment at Customers
	The Company records purchases of new parts cleaning machines as Inventory. Parts cleaning machines are either sold to a customer or continue to be owned by the Company but placed offsite at a customer location to be used in parts cleaning services. When sold to a customer, machines are removed from inventory, and the appropriate revenue and cost is recognized in the Income Statement. When the Company retains title to a machine that is placed off-site at a customer location to be used in parts cleaning services, the Company capitalizes the machine as a productive non-current asset under the Balance Sheet caption “Equipment at Customers” at the time the machine is placed at the customer’s site. Machines capitalized as Equipment at Customers are depreciated over their estimated useful lives of 10 or 15 years, depending on the model. Depreciation of in-service equipment commences when equipment is placed in service at a customer location. Expenditures for machines that are sold to a customer are treated as a cash outflow from operating activities on the Statement of Cash Flows. Expenditures for machines that are placed at a customer’s site to be used in parts cleaning services are treated as a cash outflow from investing activities.
Acquisitions	'
	Acquisitions
	The Company accounts for acquired businesses using the purchase method of accounting, which requires that the assets acquired, liabilities assumed, and contingent consideration be recorded as of the date of acquisition at their respective fair values. It further requires that acquisition-related costs be recognized separately from the acquisition and expensed as incurred and restructuring costs to be expensed in periods subsequent to the acquisition date. The Company engaged third party valuation appraisal firms to assist the Company in determining the fair values and useful lives of the assets acquired. The Company records a preliminary purchase price allocation for its acquisitions and finalizes purchase price allocations as additional information relative to the fair values of the assets acquired becomes known.
Identifiable Intangible Assets	'
	Identifiable Intangible Assets
	The fair value of identifiable intangible assets is based on significant judgments made by management. The Company engaged third party valuation appraisal firms to assist the Company in determining the fair values and useful lives of the assets acquired. Such valuations and useful life determinations require the Company to make significant estimates and assumptions. These estimates and assumptions are based on historical experience and information obtained from the management of the acquired companies and also include, but are not limited to, future expected cash flows to be earned from the continued operation of the acquired business and discount rates applied in determining the present value of those cash flows. Unanticipated events and circumstances may occur that could affect the accuracy or validity of such assumptions, estimates, or actual results. Acquisition-related finite lived intangible assets are amortized on a straight-line basis over their estimated economic lives. The Company evaluates the estimated benefit periods and recoverability of its intangible assets when facts and circumstances indicate that the lives may not be appropriate and/or the carrying value of the asset may not be recoverable. If the carrying value is not recoverable, impairment is measured as the amount by which the carrying value exceeds its estimated fair value.
Software Costs	'
	Software Costs
	The Company expenses costs incurred in the research stage of developing or acquiring internal use software, such as research and feasibility studies, as well as costs incurred in the post-implementation/operational stage, such as maintenance and training. Capitalization of software costs occurs only after the research stage is complete and after the development stage begins. The capitalized costs are amortized on a straight-line basis over the estimated useful lives of the software, ranging from 5 to 10 years.
Impairment of Long-Lived Assets	'
	Impairment of Long-Lived Assets
	Long-lived assets, such as property and equipment and intangibles subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized as the amount by which the carrying amount of the asset exceeds the fair value of the asset. Assets to be disposed of would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and would no longer be depreciated. No triggering events occurred that would indicate potential impairment during the periods presented.
Income Taxes	'
	Income Taxes
	The Company accounts for income taxes to recognize the amount of taxes payable or refundable for the current year and the amount of deferred tax assets and liabilities resulting from the future tax consequences of differences between the financial statements and tax basis of the respective assets and liabilities. The Company estimates and reserves for any material uncertain tax position that is unlikely to withstand an audit by the taxing authorities. These estimates are based on judgments made with currently available information. The Company reviews these estimates and makes changes to recorded amounts of any uncertain tax positions as facts and circumstances warrant. For additional information about income taxes, see Note 14.
Shipping Costs	'
	Shipping Costs
	For all periods presented, amounts billed to customers related to shipping and handling are classified as revenue, and the Company's shipping and handling costs are included in operating costs.
Research and Development	'
	Research and Development
	Research and development costs are expensed as incurred within general, selling, and administrative expenses. Such costs incurred during fiscal 2013 were $0.3 million.
Advertising Costs	'
	Advertising Costs
	Advertising costs are expensed as incurred. Advertising expense was $0.6 million, $0.5 million, and $0.5 million for fiscal 2013, 2012, and 2011, respectively.
Share-based Compensation	'
	Share-Based Compensation
	The Company recognizes stock based compensation expense based on estimated grant date fair value of the awards. The Company values restricted stock as of the closing stock price on the measurement date and then amortizes the expense on a straight-line basis over the requisite service period.
	When a future restricted grant is approved, the Company evaluates the probability that the award will be granted, based on certain performance conditions. If the performance criteria are deemed probable, the Company accrues compensation expense related to these awards prior to the grant date. The Company accrues compensation expense based on the fair value of the performance awards at each reporting period when the performance criteria are deemed probable. Once the performance awards have been granted, the Company values the awards at fair value on the date of grant and amortizes the expense through the end of the vesting period. See Note 15 “Share-Based Compensation” for more details.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The Company uses a three-tier fair value hierarchy to classify and disclose all assets and liabilities measured at fair value on a recurring basis, as well as assets and liabilities measured at fair value on a non-recurring basis, in periods subsequent to their initial measurement. These tiers include: Level 1, defined as quoted market prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, model-based valuation techniques for which all significant assumptions are observable in the market, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3, defined as unobservable inputs that are not corroborated by market data.
	The Company’s financial instruments consist primarily of cash and cash equivalents, trade receivables, trade payables, notes payable, contingent consideration, and term debt.  As of December 28, 2013 and December 29, 2012, the carrying values of cash and cash equivalents, trade receivables, trade payables, notes payable, and contingent consideration, are considered to be representative of their respective fair values due to the short maturity of these instruments. Term debt is representative of its fair value due to the interest rates being applied.
Insurance and Self-Insurance Policy	'
	Insurance and Self-Insurance Policy
	The Company purchases insurance providing financial protection from a range of risks; as of the end of fiscal 2013, the Company's insurance policies provided coverage for general liability, vehicle liability, and pollution liability, among other exposures.  Each of these policies contains exclusions and limitations such that they would not cover all related exposures and each of these policies have maximum coverage limits and deductibles such that even in the event of an insured claim, the Company's net exposure could still have a material adverse effect on its financial results.
	The Company is self-insured for certain healthcare benefits provided to its employees. The liability for the self-insured benefits is limited by the purchase of stop-loss insurance. The stop-loss coverage provides payment for medical and prescription claims exceeding $75,000 per covered person, as well as an aggregate, cumulative claims cap, for any given year. Accruals for losses are made based on the Company's claim experience and actuarial estimates based on historical data. Actual losses may differ from accrued amounts. At December 28, 2013 and December 29, 2012, the Company's liability for its self-insured benefits was $0.8 million and $0.7 million, respectively. Should actual losses exceed the amounts expected and the recorded liabilities be insufficient, an additional expense will be recorded. Expenses incurred for healthcare benefits in fiscal 2013, 2012, and 2011 were $6.2 million, $6.0 million, and $4.0 million, respectively.
Goodwill	'
	Goodwill
	Goodwill is measured as a residual amount as of the acquisition date, which in most cases results in measuring goodwill as an excess of the purchase consideration transferred plus the fair value of any noncontrolling interest in the acquiree over the fair value of the net assets acquired, including any contingent consideration. The Company tests goodwill for impairment annually in the fourth quarter and in interim periods if changes in circumstances indicate that the carrying amount of goodwill may not be recoverable. The Company's determination of fair value requires certain assumptions and estimates, such as margin expectations, growth expectations, expected changes in working capital, etc., regarding future profitability and cash flows of acquired businesses and market conditions. In the fourth quarter of fiscal 2013, the Company tested goodwill for impairment on a quantitative basis and determined that the fair value of each reporting unit substantially exceeded the carrying value of the assets and no impairment existed as of December 28, 2013. However, due to the inherent uncertainties associated with using these assumptions, impairment charges could occur in future periods.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 28, 2013
Accounting Policies [Abstract]	'
Schedule of Goodwill	'
	The change in the carrying amount of goodwill by segment from December 31, 2011 to December 28, 2013 is as follows (in thousands):
		Oil Business		Environmental Services		Total
	Balance at December 31, 2011	$	1,801	$	—	$	1,801
	Fiscal Year 2012 Activity	—		—		—
	Balance at December 29, 2012	$	1,801	$	—	$	1,801
	Mirachem Acquisition	—		809		809
	RFTI Acquisition	—		3,027		3,027
	RTI Acquisition	—		1,917		1,917
	ULNT/RS Acquisition	2,100		—		2,100
	Balance at December 28, 2013	$	3,901	$	5,753	$	9,654

Business_Combinations_Tables

Business Combinations (Tables)	12 Months Ended
	Dec. 28, 2013
Business Combinations [Abstract]	'
Schedule of Business Acquisitions, by Acquisition	'
	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed, net of cash acquired, related to each acquisition (in thousands):
		Mirachem			RFTI (a)			RTI (a)			ULNT/RS (a)
	Accounts Receivable	$	—		$	348		$	136		$	—
	Other current assets	—			—			—			101
	Inventory	476			211			106			955
	Property, Plant, & Equipment	218			1,283			793			1,540
	Intangible Assets	2,710			1,590			1,340			6,274
	Goodwill	809			3,027			1,917			2,100
	Accounts Payable	(139		)	(91		)	—			—
	Non-controlling interest	(834		)	—			—			—
	Total purchase price, net of cash acquired	$	3,240		$	6,368		$	4,292		$	10,970
	Less: common stock issued	—			(1,230		)	(1,000		)	—
	Less:  note issued	(835		)	—			(430		)	—
	Working capital adjustment	—			(218		)	8			—
	Net cash paid	$	2,405		$	4,920		$	2,870		$	10,970
	_______________
	(a) The Company is continuing to evaluate the purchase price allocations. Preliminary purchase price allocations are tentative and subject to revision as the Company finalizes appraisals and other analyses. Final determination of the fair values may result in further adjustments to the values presented above.
Business Acquisition, Pro Forma Information	'
	Unaudited Pro Forma Financial Information
	The pro forma financial information in the table below presents the combined results of the Company as if the acquisitions that occurred in fiscal 2013 had occurred January 1, 2012 (in thousands, except per share data). The pro forma information is shown for illustrative purposes only and is not necessarily indicative of future results of operations of the Company or results of operations of the Company that would have actually occurred had the transactions been in effect for the periods presented. Nor is it intended to represent or be indicative of actual results had the acquisition occurred as of the beginning of each period. Additionally, certain one-time transaction expenses that are a direct result of the acquisitions have been excluded from years ended December 28, 2013 and December 29, 2012.
			Fiscal Year Ended,
			28-Dec-13			29-Dec-12
	Total Revenues		$	300,360		$	278,179
	Net Income		4,397			2,061
	Earnings per share
	Basic		$	0.25		$	0.13
	Diluted		$	0.24		$	0.12

Accounts_Receivable_Tables

Accounts Receivable (Tables)	12 Months Ended
	Dec. 28, 2013
Receivables [Abstract]	'
Schedule of Accounts Receivable	'
	Accounts receivable consisted of the following (in thousands):
		December 28,			December 29,
		2013			2012
	Trade	$	29,663		$	24,026
	Less: allowance for doubtful accounts	1,121			1,244
	Trade - net	28,542			22,782
	Related parties	2,045			410
	Other	585			146
	Total accounts receivable - net	$	31,172		$	23,338
	The following table provides the changes in the Company’s allowance for doubtful accounts for the fiscal year ended December 28, 2013 and the fiscal year ended December 29, 2012 (in thousands):
		Fiscal Year Ended,
		December 28,			December 29,
		2013			2012
	Balance at beginning of period	$	1,244		$	698
	Provision for bad debts	444			1,122
	Accounts written off, net of recoveries	(567		)	(576		)
	Balance at end of period	$	1,121		$	1,244

Inventory_Tables

Inventory (Tables)	12 Months Ended
	Dec. 28, 2013
Inventory Disclosure [Abstract]	'
Schedule of Inventory, Current [Table Text Block]	'
	The following table provides the changes in the Company's machine refurbishing reserve related to inventory for fiscal years 2013 and 2012 (in thousands):
		Fiscal Year Ended,
		December 28, 2013			December 29, 2012
	Balance at beginning of period	$	241		$	159
	Net change in reserve	(24		)	82
	Balance at end of period	$	217		$	241
	The carrying value of inventory consisted of the following (in thousands):
		December 28,			December 29,
		2013			2012
	Oil	$	12,733		$	11,549
	Solvents	7,990			10,076
	Machines	2,934			2,470
	Drums	2,008			1,859
	Other	1,859			1,518
	Total inventory	27,524			27,472
	Less: Machine refurbishing reserve	217			241
	Total inventory - net	$	27,307		$	27,231

Property_Plant_and_Equipment_T

Property, Plant, and Equipment (Tables)	12 Months Ended
	Dec. 28, 2013
Property, Plant and Equipment [Abstract]	'
Schedule of Property, Plant, and Equipment	'
	Property, plant, and equipment consisted of the following (in thousands):
		December 28,			December 29,
		2013			2012
	Buildings and storage tanks (a)	$	53,106		$	45,813
	Machinery, vehicles, and equipment (a)	33,738			30,040
	Leasehold improvements (a)	2,875			3,180
	Land (a)	835			414
	Construction in progress	11,047			4,658
	Total property, plant, and equipment	101,601			84,105
	Less: accumulated depreciation	(16,485		)	(11,859		)
	Property, plant, and equipment - net	$	85,116		$	72,246
		December 28,			December 29,
		2013			2012
	Equipment at customers	$	47,078		$	41,884
	Less: accumulated depreciation	(27,720		)	(23,938		)
	Equipment at customers - net	$	19,358		$	17,946
	_______________
	(a) Fiscal 2013 numbers include preliminary fair values of assets acquired in the acquisitions described in Note 3 that may be adjusted as additional information becomes known.

Software_and_Other_Intangible_1

Software and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 28, 2013
Software and other intangible assets [Abstract]	'
Schedule of Finite-Lived Intangible Assets	'
	Following is a summary of software and other intangible assets (in thousands):
		28-Dec-13						29-Dec-12
		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	Customer & supplier relationships(a)	$	10,489	$	826	$	9,663	$	1,729	$	274	$	1,455
	Non-compete agreements(a)	2,794		713		2,081		777		510		267
	Software	4,799		2,815		1,984		4,296		2,635		1,661
	Patents, formulae, and licenses(a)	1,825		370		1,455		1,059		262		797
	Other	1,008		137		871		539		164		375
	Total software and intangible assets	$	20,915	$	4,861	$	16,054	$	8,400	$	3,845	$	4,555
	_______________
	(a) Fiscal 2013 numbers include preliminary fair values of assets acquired in the acquisitions described in Note 3 that may be adjusted as additional information becomes known.

Accounts_Payable_Tables

Accounts Payable (Tables)	12 Months Ended
	Dec. 28, 2013
Accounts Payable [Abstract]	'
Accounts Payable	'
	Accounts payable consisted of the following (in thousands):
		December 28,		December 29,
		2013		2012
	Accounts payable	$	17,908	$	16,202
	Accounts payable - related parties	383		307
	Total accounts payable	$	18,291	$	16,509

Debt_and_Financing_Arrangement

Debt and Financing Arrangements (Tables)	12 Months Ended
	Dec. 28, 2013
Debt Disclosure [Abstract]	'
Schedule of Maturities of Long-term Debt	'
	The aggregate contractual annual maturities for debt as of December 28, 2013 are as follows (in thousands):
	Fiscal Year:	Notes Payable			Term Loan		Total
	2014	$	1,156		$	1,750	$	2,906
	2015	623			1,500		2,123
	2016	—			2,000		2,000
	2017	—			1,500		1,500
	2018	—			12,500		12,500
	Thereafter	—			—		—
	Total debt	$	1,779		$	19,250	$	21,029
	Less: Unamortized discount	(71		)	—		(71		)
	Net debt	$	1,708		$	19,250	$	20,958

Related_Party_and_Affiliated_T1

Related Party and Affiliated Transactions (Tables)	12 Months Ended
	Dec. 28, 2013
Related Party and Affiliate Transactions [Abstract]	'
Schedule of Related Party Transactions	'
	During fiscal 2013, 2012, and 2011, the Company had transactions with affiliates and other related parties. The following table sets forth related-party transactions (in thousands):
		Fiscal 2013				Fiscal 2012				Fiscal 2011
		Revenues		Expenses		Revenues		Expenses		Revenues		Expenses
	Heritage Group affiliates	$	10,421	$	3,474	$	7,662	$	4,876	$	2,105	$	2,259
	Other related parties / affiliates	4,875		4,633		5,829		3,926		33		2,558
	Total	$	15,296	$	8,107	$	13,491	$	8,802	$	2,138	$	4,817

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 28, 2013
SEGMENT INFORMATION [Abstract]	'
Reconciliation of Operating Profit (Loss) from Segments to Consolidated	'
	Operating segment results for the fiscal years ended December 28, 2013, December 29, 2012, and December 31, 2011 were as follows (in thousands):
	For the Fiscal Years Ended,
	December 28, 2013
				Environmental		Oil Business			Corporate and			Consolidated
				Services					Eliminations
	Revenues
		Product revenues		$	14,449	$	117,960		$	—		$	132,409
		Service revenues		142,833		7,894						150,727
	Total revenues			$	157,282	$	125,854		$	—		$	283,136
	Operating expenses
		Operating costs		110,459		124,179			—			234,638
		Operating depreciation and amortization		4,937		3,364			—			8,301
	Profit (loss) before corporate selling, general, and administrative expenses			$	41,886	$	(1,689	)	$	—		$	40,197
	Selling, general, and administrative expenses								30,274			30,274
	Depreciation and amortization from SG&A								1,223			1,223
	Total selling, general, and administrative expenses								$	31,497		$	31,497
	Other expense - net								210			210
	Operating income											8,490
	Interest expense - net								417			417
	Income before income taxes											$	8,073
	29-Dec-12
				Environmental		Oil Business			Corporate and			Consolidated
				Services					Eliminations
	Revenues
		Product revenues		$	11,025	$	108,445		$	—		$	119,470
		Service revenues		128,129		4,892						133,021
	Total revenues			$	139,154	$	113,337		$	—		$	252,491
	Operating expenses
		Operating costs		104,994		108,574			—			213,568
		Operating depreciation and amortization		4,615		2,894			—			7,509
	Profit before corporate selling, general, and administrative expenses			$	29,545	$	1,869		$	—		$	31,414
	Selling, general, and administrative expenses								26,194			26,194
	Depreciation and amortization from SG&A								632			632
	Total selling, general, and administrative expenses								$	26,826		$	26,826
	Other expense - net								6			6
	Operating income											4,582
	Interest expense - net								585			585
	Income before income taxes											$	3,997
	31-Dec-11
				Environmental		Oil Business			Corporate and			Consolidated
				Services					Eliminations
	Revenues
		Product revenues		$	9,064	$	30,085		$	—		$	39,149
		Service revenues		110,448		3,261						113,709
	Total revenues			$	119,512	$	33,346		$	—		$	152,858
	Operating expenses
		Operating costs		90,751		33,249			—			124,000
		Operating depreciation and amortization		4,218		805			—			5,023
	Profit (loss) before corporate selling, general, and administrative expenses			$	24,543	$	(708	)	$	—		$	23,835
	Selling, general, and administrative expenses								20,715			20,715
	Depreciation and amortization from SG&A								634			634
	Total selling, general, and administrative expenses								$	21,349		$	21,349
	Other income - net								(10		)	(10		)
	Operating income											2,496
	Interest expense - net								37			37
	Income before income taxes											$	2,459
Reconciliation of Assets from Segment to Consolidated	'
	Total assets by segment as of December 28, 2013 and December 29, 2012 were as follows (in thousands):
				December 28, 2013		December 29, 2012
	Total Assets:
		Environmental Services		$	80,451	$	57,092
		Oil Business		110,040		87,222
		Unallocated Corporate Assets		25,467		54,797
			Total	$	215,958	$	199,111
Capital Expenditures by Segment	'
	Total capital expenditures by segment for fiscal 2013, 2012, and 2011 were as follows (in thousands):
				For the Fiscal Year Ended,
				December 28, 2013		29-Dec-12			31-Dec-11
	Total Capital Expenditures:
		Environmental Services		$	18,882	$	5,924		$	5,898
		Oil Business		20,549		15,225			37,903
		Unallocated Corporate Assets		138		1,907			1,814
			Total	$	39,569	$	23,056		$	45,615

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 28, 2013
COMMITMENTS AND CONTINGENCIES [Abstract]	'
Schedule of Future Minimum Rental Payments for Operating Leases	'
	Future minimum lease payments under noncancelable operating leases as of December 28, 2013 are as follows (in thousands):
	Fiscal year:
	2014	$	16,141
	2015	14,345
	2016	12,190
	2017	10,989
	2018	9,703
	Thereafter	12,034
	Total	$	75,402

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 28, 2013
Income Tax Disclosure [Abstract]	'
Schedule of Components of Income Tax Expense (Benefit)	'
	Components of the Company's income tax benefit and provision consist of the following for fiscal years 2013, 2012, and 2011 (in thousands):
		For the Fiscal Years Ended,
		28-Dec-13			29-Dec-12			31-Dec-11
	Current:
	Federal	$	21		$	127		$	(1,643	)
	State	171			338			(147		)
	Total current	$	192		$	465		$	(1,790	)
	Deferred:
	Federal	$	2,679		$	1,443		$	2,604
	State	557			(165		)	171
	Total deferred	$	3,236		$	1,278		$	2,775
	Income tax provision	$	3,428		$	1,743		$	985
Schedule of Effective Income Tax Rate Reconciliation	'
	A reconciliation of the expected income taxes at the statutory federal rate to the Company's actual income taxes is as follows (in thousands):
		For the Fiscal Years Ended,
		December 28, 2013			29-Dec-12
	Tax at statutory federal rate	$	2,745		$	1,359
	State and local tax, net of federal benefit	508			257
	Other	175			127
	Total income tax provision	$	3,428		$	1,743
Schedule of Deferred Tax Assets and Liabilities	'
	Components of deferred tax assets (liabilities) are as follows (in thousands):
		As of,
		December 28, 2013			29-Dec-12
	Deferred tax assets:
	Net operating loss carryforward	$	12,073		$	13,662
	Stock compensation	1,573			1,448
	Tax intangible assets	1,355			1,526
	Reserves and accruals	1,202			698
	Income tax credits	706			574
	Allowance for doubtful accounts	463			496
	Total deferred tax asset	$	17,372		$	18,404
	Deferred tax liabilities:
	Prepaids	$	(602	)	$	(471	)
	Depreciation and amortization	(25,004		)	(22,931		)
	Total deferred tax liability	(25,606		)	(23,402		)
	Net deferred tax liability	$	(8,234	)	$	(4,998	)
	Net current deferred tax asset	1,004			759
	Net non-current deferred tax liability	(9,238		)	(5,757		)
	Net deferred tax liability	$	(8,234	)	$	(4,998	)
Schedule of Unrecognized Tax Benefits Roll Forward	'
	The following table summarizes the movement in unrecognized tax benefits (in thousands):
		For the Fiscal Years Ended,
		28-Dec-13			29-Dec-12
	Gross Unrecognized Tax Benefits:
	Beginning Balance	$	194		$	—
	Additions Based on Current Year's Tax Positions	30			19
	Additions from Prior Year's Tax Positions	49			175
	Ending Balance	$	273		$	194

Sharebased_Compensation_Tables

Share-based Compensation (Tables)	12 Months Ended
	Dec. 28, 2013
Share-based Compensation [Abstract]	'
Schedule of Share-based Compensation, Stock Options, Activity	'
	A summary of stock option activity under this Plan is as follows:
	Stock Options	Number of			Weighted Average			Weighted Average	Aggregate
		Options			Exercise Price			Remaining	Intrinsic Value as of Date Listed
		Outstanding						Contractual Term	(in thousands)
								(in years)
	Options outstanding at December 31, 2011	771,337			$	10.83		6.38	$	4,421
	Exercised	(142,289	)		$	11.15
	Options outstanding at December 29, 2012	629,048			$	10.76		5.4	$	2,607
	Exercised	(49,434	)		$	8.06
	Options outstanding at December 28, 2013	579,614			$	10.98		4.35	$	5,133
	Stock Options Vested	Number of Options			Grant-Date Fair Value
	Nonvested stock options at December 31, 2011	78,805			$	3.24
	Less: Shares vested during period	(39,402	)		3.24
	Nonvested stock options at December 29, 2012	39,403			$	3.24
	Less: Shares vested during period	(39,403	)		3.24
	Nonvested stock options at December 28, 2013	—
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	'
	Assumptions used in the Black-Scholes-Merton option pricing model for granted options follow:
		$3.24 per option granted in March 2009
	Expected volatility	41.6	%
	Risk-free interest rate	2.4	%
	Dividend yield	—
	Expected life	6.25		years
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	'
	The following table summarizes information about restricted stock awards for the periods ended December 29, 2012 and December 28, 2013:
	Restricted Stock (Nonvested Shares)		Number of Shares			Weighted Average Grant-Date Fair Value Per Share
	Nonvested shares outstanding at December 31, 2011		114,038			$	12.82
	Granted		73,032			21.74
	Vested		(45,599	)		13.8
	Forfeited		(202	)		16.53
	Nonvested shares outstanding at December 29, 2012		141,269			$	17.11
	Granted		28,666			15.26
	Vested		(69,782	)		16.55
	Forfeited		(101	)		16.53
	Nonvested shares outstanding at December 28, 2013		100,052			$	16.97

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 28, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted	'
	The following table reconciles the number of shares outstanding for fiscal 2013, 2012, and 2011 respectively, to the number of weighted average basic shares outstanding and the number of weighted average diluted shares outstanding for the purposes of calculating basic and diluted earnings per share (in thousands, except per share data):
		For the Fiscal Years Ended,
		December 28, 2013		December 29, 2012		31-Dec-11
	Net income	$	4,645	$	2,254	$	1,474
	Less: Income attributable to noncontrolling interest	100		—		—
	Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$	4,545	$	2,254	$	1,474
	Weighted average basic shares outstanding	18,224		16,921		14,313
	Dilutive shares for share–based compensation plans	328		442		397
	Weighted average diluted shares outstanding	18,552		17,363		14,710
	Net income per share: basic	$	0.25	$	0.13	$	0.1
	Net income per share: diluted	$	0.24	$	0.13	$	0.1

Selected_Quarterly_Financial_D1

Selected Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 28, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Schedule of Quarterly Financial Information	'
			Fiscal 2013										Fiscal 2012
			First			Second		Third		Fourth			First		Second		Third		Fourth
			Quarter			Quarter		Quarter		Quarter (a)			Quarter		Quarter		Quarter		Quarter (a)
			(In thousands except per share data)
	STATEMENT OF
	OPERATIONS DATA:
	Revenues
	Product revenues		$	26,558		$	28,906	$	32,302	$	44,643		$	21,215	$	31,941	$	31,348	$	34,966
	Service revenues		33,449			34,644		35,301		47,333			29,294		30,330		30,718		42,679
	Total Revenues		$	60,007		$	63,550	$	67,603	$	91,976		$	50,509	$	62,271	$	62,066	$	77,645
	Operating expenses -
	Operating Costs		$	52,286		$	52,201	$	55,698	$	74,453		$	42,337	$	51,908	$	52,718	$	66,605
	Selling, general, and administrative expenses		6,591			7,049		7,051		9,583			5,756		6,235		5,566		8,637
	Depreciation and amortization		1,859			2,163		2,224		3,278			1,772		1,911		1,904		2,554
	Other expense (income)		(8		)	101		138		(21		)	1		—		9		(4		)
	Operating income (loss)		(721		)	2,036		2,492		4,683			643		2,217		1,869		(147		)
	Interest expense – net		106			107		97		107			187		146		112		140
	Income (loss) before income taxes		$	(827	)	$	1,929	$	2,395	$	4,576		$	456	$	2,071	$	1,757	$	(287	)
	Provision for (benefit from) income taxes		(407		)	872		1,061		1,902			186		853		723		(19		)
	Net income (loss)		(420		)	1,057		1,334		2,674			270		1,218		1,034		(268		)
	Less: Income attributable to noncontrolling interest		20			26		26		28			—		—		—		—
	Net income (loss) attributable to Heritage-Crystal Clean, Inc. common stockholders		$	(440	)	$	1,031	$	1,308	$	2,646		$	270	$	1,218	$	1,034	$	(268	)
	Net income per share: basic		(0.02		)	0.06		0.07		0.15			0.02		0.07		0.06		(0.01		)
	Net income per share: diluted		(0.02		)	0.06		0.07		0.14			0.02		0.07		0.06		(0.01		)
	Number of weighted average
	common shares outstanding:
	Basic		18,113			18,138		18,272		18,335			14,486		16,689		18,060		18,067
	Diluted		18,113			18,456		18,585		18,677			14,962		17,140		18,412		18,067
	OTHER OPERATING DATA:
	Average revenues per working day - Environmental Services		$	580		$	600	$	625	$	650		$	515	$	545	$	555	$	570
	____________
	(a)	Reflects a sixteen week quarter.

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Useful Lives) (Details)	12 Months Ended
	Dec. 28, 2013
Buildings an Storage Tanks [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment, estimated useful lives	'10 years
Buildings an Storage Tanks [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment, estimated useful lives	'39 years
Machinery, Vehicles and Equipment [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment, estimated useful lives	'3 years
Machinery, Vehicles and Equipment [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment, estimated useful lives	'25 years
Leasehold Improvements [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment, estimated useful lives	'5 years
Equipment at Customers [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment, estimated useful lives	'10 years
Equipment at Customers [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment, estimated useful lives	'15 years
Software and Software Development Costs [Member]	'
Property, Plant and Equipment [Line Items]	'
Software, estimated useful life	'10 years
Software and Software Development Costs [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Software, estimated useful life	'5 years
Software and Software Development Costs [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Software, estimated useful life	'10 years

Summary_of_Significant_Account4

Summary of Significant Accounting Policies (Narrative) (Details) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 29, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 28, 2013

Dec. 31, 2012

Dec. 28, 2013

Dec. 28, 2013

Dec. 28, 2013

Jun. 26, 2013

Dec. 28, 2013

Dec. 28, 2013

Dec. 28, 2013

Jul. 19, 2013

Dec. 28, 2013

Dec. 28, 2013

Dec. 28, 2013

Nov. 01, 2013

Dec. 28, 2013

Dec. 28, 2013

Oil Business Segment [Member]

Oil Business Segment [Member]

Environmental Services Segment [Member]

Environmental Services Segment [Member]

Mirachem Acquisition [Member]

Mirachem Acquisition [Member]

Mirachem Acquisition [Member]

Mirachem Acquisition [Member]

RFTI [Member]

RFTI [Member]

RFTI [Member]

RFTI [Member]

RTI [Member]

RTI [Member]

RTI [Member]

RTI [Member]

UL-NT/RS [Member]

UL-NT/RS [Member]

UL-NT/RS [Member]

UL-NT/RS [Member]

Oil Business Segment [Member]

Environmental Services Segment [Member]

Oil Business Segment [Member]

Environmental Services Segment [Member]

Oil Business Segment [Member]

Environmental Services Segment [Member]

Oil Business Segment [Member]

Environmental Services Segment [Member]

Goodwill [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill, beginning

$1,801,000

$1,801,000

'

$1,801,000

$3,901,000

$0

$5,753,000

'

$809,000

'

'

'

$3,027,000

[1]

'

'

'

$1,917,000

[1]

'

'

'

$2,100,000

[1]

'

'

Goodwill, acquired during period

'

0

'

0

'

0

'

809,000

'

0

809,000

3,027,000

'

0

3,027,000

1,917,000

'

0

1,917,000

2,100,000

'

2,100,000

0

Goodwill, ending

9,654,000

1,801,000

1,801,000

1,801,000

3,901,000

0

5,753,000

'

809,000

'

'

'

3,027,000

[1]

'

'

'

1,917,000

[1]

'

'

'

2,100,000

[1]

'

'

Capitalized interest

143,000

104,000

223,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Research and development expense

300,000

100,000

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Advertising expense

600,000

500,000

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Self Insurance Stop Loss Limit

75,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Self Insurance Reserve

800,000

700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Policyholder Benefits and Claims Incurred, Net

$6,200,000

$6,000,000

$4,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

The Company is continuing to evaluate the purchase price allocations. Preliminary purchase price allocations are tentative and subject to revision as the Company finalizes appraisals and other analyses. Final determination of the fair values may result in further adjustments to the values presented above.

Business_Combination_Details

Business Combination (Details) (USD $)

12 Months Ended

0 Months Ended

0 Months Ended

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 01, 2011

Dec. 31, 2012

Jun. 26, 2013

Jul. 19, 2013

Nov. 01, 2013

Dec. 31, 2012

Mirachem Acquisition [Member]

RFTI [Member]

RTI [Member]

UL-NT/RS [Member]

Notes Payable, Other Payables [Member]

Mirachem Acquisition [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

Gross Cash Paid - Acquisition

'

'

'

'

$2,500,000

'

'

'

'

Note payable

-21,029,000

'

'

'

835,000

'

-430,000

[1]

'

'

Note payable, term

'

'

'

'

'

'

'

'

'2 years

Ownership by noncontrolling owners, percent

'

'

'

'

20.00%

'

'

'

'

Equity interest, shares

'

'

'

'

'

82,000

69,322

'

'

Estimated Fair Value of Assets Acquired and Liabilities Assumed

'

'

'

'

'

'

'

'

'

Accounts Receivable

'

'

'

'

'

348,000

[1]

136,000

[1]

'

'

Other current assets

3,633,000

2,821,000

'

'

'

'

'

101,000

[1]

'

Inventory

'

'

'

'

476,000

211,000

[1]

106,000

[1]

955,000

[1]

'

Property, Plant, & Equipment

'

'

'

'

218,000

1,283,000

[1]

793,000

[1]

1,540,000

[1]

'

Intangible Assets

'

'

'

'

2,710,000

1,590,000

[1]

1,340,000

[1]

6,274,000

[1]

'

Goodwill

9,654,000

1,801,000

1,801,000

'

809,000

3,027,000

[1]

1,917,000

[1]

2,100,000

[1]

'

Accounts Payable

'

'

'

'

-139,000

-91,000

[1]

'

'

'

Non-controlling interest

'

'

'

'

-834,000

'

'

'

'

Total purchase price, net of cash acquired

'

'

'

1,700,000

3,240,000

6,368,000

[1]

4,292,000

[1]

10,970,000

[1]

'

Less: common stock issued

'

'

'

'

'

-1,230,000

[1]

-1,000,000

[1]

'

'

Working capital adjustment

'

'

'

'

'

-218,000

[1]

8,000

[1]

'

'

Net cash paid

'

'

'

'

2,405,000

4,920,000

[1]

2,870,000

[1]

10,970,000

[1]

'

Revenue from acquisition

5,200,000

'

'

'

'

'

'

'

'

Pre-tax income from acquisition

400,000

'

'

'

'

'

'

'

'

Acquisition costs

300,000

'

'

'

'

'

'

'

'

Unaudited Pro Forma Information [Abstract]

'

'

'

'

'

'

'

'

'

Total Revenues

300,360,000

278,179,000

'

'

'

'

'

'

'

Net Income

$4,397,000

$2,061,000

'

'

'

'

'

'

'

Earnings Per Share [Abstract]

'

'

'

'

'

'

'

'

'

Basic (in dollars per share)

$0.25

$0.13

'

'

'

'

'

'

'

Diluted (in dollars per share)

$0.24

$0.12

'

'

'

'

'

'

'

[1]

The Company is continuing to evaluate the purchase price allocations. Preliminary purchase price allocations are tentative and subject to revision as the Company finalizes appraisals and other analyses. Final determination of the fair values may result in further adjustments to the values presented above.

Accounts_Receivable_Details

Accounts Receivable (Details) (USD $)	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Accounts Receivable [Abstract]	'	'	'
Trade	$29,663	$24,026	'
Less allowance for doubtful accounts	1,121	1,244	698
Trade - net	28,542	22,782	'
Related parties	2,045	410	'
Other	585	146	'
Accounts receivable - net	$31,172	$23,338	'

Accounts_Receivable_Rollforwar

Accounts Receivable (Rollforward of Allowance) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts Receivable [Roll Forward]	'	'	'
Balance at beginning pf period	$1,244	$698	'
Provision for bad debts	444	1,122	493
Accounts written off, net of recoveries	-567	-576	'
Balance at end of period	$1,121	$1,244	$698

Inventory_Details

Inventory (Details) (USD $)	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'	'
Oil	$12,733	$11,549	'
Solvents	7,990	10,076	'
Machines	2,934	2,470	'
Drums	2,008	1,859	'
Other	1,859	1,518	'
Total inventory	27,524	27,472	'
Machine refurbishing reserve	217	241	159
Inventory - net	$27,307	$27,231	'

Inventory_Reserve_Details

Inventory (Reserve) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Inventory Reserve [Roll Forward]	'	'
Balance at beginning of period	$241	$159
Net change in reserve	-24	82
Balance at end of period	$217	$241

Property_Plant_and_Equipment_D

Property, Plant, and Equipment (Details) (USD $)	Dec. 28, 2013		Dec. 29, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Abstract]	'		'
Buildings and storage tanks	$53,106	[1]	$45,813
Machinery, vehicles, and equipment	33,738	[1]	30,040
Leasehold improvements	2,875	[1]	3,180
Land	835		414
Construction in progress	11,047		4,658
Total property, plant, and equipment	101,601		84,105
Less: accumulated depreciation	-16,485		-11,859
Property, plant and equipment - net	85,116		72,246
Equipment at customers	47,078		41,884
Less: accumulated depreciation	-27,720		-23,938
Equipment at customers - net	$19,358		$17,946
[1]	Fiscal 2013 numbers include preliminary fair values of assets acquired in the acquisitions described in Note 3 that may be adjusted as additional information becomes known.

Software_and_Other_Intangible_2

Software and Other Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	$20,915,000	$8,400,000	'
Accumulated Amortization	4,861,000	3,845,000	'
Net Carrying Amount	16,054,000	4,555,000	'
Amortization expense	1,100,000	700,000	600,000
Expected Future Amortization [Abstract]	'	'	'
2014	1,900,000	'	'
2015	1,800,000	'	'
2016	1,600,000	'	'
2017	1,500,000	'	'
2018	1,400,000	'	'
Customer & supplier relationships [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	10,489,000	1,729,000	'
Accumulated Amortization	826,000	274,000	'
Net Carrying Amount	9,663,000	1,455,000	'
Intangibles, estimated useful life	'12 years	'	'
Non-compete agreements [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	2,794,000	777,000	'
Accumulated Amortization	713,000	510,000	'
Net Carrying Amount	2,081,000	267,000	'
Intangibles, estimated useful life	'5 years	'	'
Software [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	4,799,000	4,296,000	'
Accumulated Amortization	2,815,000	2,635,000	'
Net Carrying Amount	1,984,000	1,661,000	'
Intangibles, estimated useful life	'10 years	'	'
Patents, formulae, and licenses [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	1,825,000	1,059,000	'
Accumulated Amortization	370,000	262,000	'
Net Carrying Amount	1,455,000	797,000	'
Intangibles, estimated useful life	'15 years	'	'
Other Intangible Assets [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	1,008,000	539,000	'
Accumulated Amortization	137,000	164,000	'
Net Carrying Amount	$871,000	$375,000	'
Intangibles, estimated useful life	'8 years	'	'

Accounts_Payable_Details

Accounts Payable (Details) (USD $)	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Accounts Payable [Abstract]	'	'
Accounts payable	$17,908	$16,202
Accounts payable - related parties	383	307
Accounts payable	$18,291	$16,509

Debt_and_Financing_Arrangement1

Debt and Financing Arrangements (Details) (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Line of Credit Facility [Line Items]	'	'	'	'
Maximum borrowing capacity	'	$40,000,000	'	'
Additional borrowings allowed	'	60,000,000	'	'
Maximum borrowings allowed	'	100,000,000	'	'
Maximum total leverage ratio	3	3.25	'	'
Minimum interest coverage ratio	'	3.5	'	'
Capital expenditure ratio limit	'	1.5	'	'
Remaining borrowing capacity	'	39,000,000	'	'
Outstanding amount on letters of credit	'	300,000	300,000	'
Capitalized interest	'	143,000	104,000	223,000
Weighted average interest rate	'	2.45%	2.75%	2.49%
Effective interest rate	'	2.54%	2.88%	2.34%
Term Loan [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Amount outstanding	'	19,300,000	19,500,000	'
Interest expense	'	500,000	'	'
Capitalized interest	'	100,000	'	'
Revolving Credit Facility [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Maximum borrowing capacity	'	19,700,000	'	'
Remaining borrowing capacity	'	19,700,000	19,700,000	'
Amount outstanding	'	$0	$0	'
Federal Funds Purchased [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Basis spread on variable rate	'	0.50%	'	'
London Interbank Offered Rate (LIBOR) [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Basis spread on variable rate	'	1.00%	'	'
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Basis spread on variable rate	'	2.75%	'	'
Maximum [Member] | Prime Rate [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Basis spread on variable rate	'	1.75%	'	'
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Basis spread on variable rate	'	1.75%	'	'
Minimum [Member] | Prime Rate [Member]	'	'	'	'
Line of Credit Facility [Line Items]	'	'	'	'
Basis spread on variable rate	'	0.75%	'	'

Debt_and_Financing_Arrangement2

Debt and Financing Arrangements (Other) (Details) (USD $)	Dec. 28, 2013	Dec. 29, 2012
In Millions, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Notes Payable	$1.70	$1.40
Notes Payable, Current	$1.20	$0.60

Debt_and_Financing_Arrangement3

Debt and Financing Arrangements (Future Maturities of Long Term Debt) (Details) (USD $)	Dec. 28, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'
2014	$2,906
2015	2,123
2016	2,000
2017	1,500
2018	12,500
Thereafter	0
Total debt	21,029
Less: Unamortized discount	-71
Net debt	20,958
Notes Payable [Member]	'
Debt Instrument [Line Items]	'
2014	1,156
2015	623
2016	0
2017	0
2018	0
Thereafter	0
Total debt	1,779
Less: Unamortized discount	-71
Net debt	1,708
Term Loan [Member]	'
Debt Instrument [Line Items]	'
2014	1,750
2015	1,500
2016	2,000
2017	1,500
2018	12,500
Thereafter	0
Total debt	19,250
Less: Unamortized discount	0
Net debt	$19,250

Employee_Benefits_Details

Employee Benefits (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Eligibility service requirement (in hours)	'1 hour	'	'
Minimum contribution of pre-tax earnings, percent	1.00%	'	'
Maximum contribution of pre-tax earnings, percent	70.00%	'	'
Defined Contribution plan, employer matching contribution, percent of employees' gross pay	4.00%	'	'
Defined contribution plan, cost recognized	$1	$1	$0.80
First 3% of Employee Contribution [Member]	'	'	'
Employer matching contribution, percent of Match	100.00%	'	'
Next 2% of Employee Contribution [Member]	'	'	'
Employer matching contribution, percent of Match	50.00%	'	'
Next 2% of Employee Contribution [Member]	'	'	'
Defined contribution plan, employee contribution	2.00%	'	'
First 3% of Employee Contribution [Member]	'	'	'
Defined contribution plan, employee contribution	3.00%	'	'

Related_Party_and_Affiliated_T2

Related Party and Affiliated Transactions (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 01, 2011
Related Party Transaction [Line Items]	'	'	'	'
Revenues	$15,296,000	$13,491,000	$2,138,000	'
Expenses	8,107,000	8,802,000	4,817,000	'
Purchase price, net of cash acquired	'	'	'	1,700,000
Contingent consideration, less current portion	0	451,000	'	2,100,000
Business combination, contingent consideration, liability, fair value	600,000	'	'	1,600,000
Repayments of contingent consideration	-551,000	-475,000	0	'
Self insurance expense - related party	900,000	800,000	400,000	'
The Heritage Group [Member]	'	'	'	'
Related Party Transaction [Line Items]	'	'	'	'
Revenues	10,421,000	7,662,000	2,105,000	'
Expenses	3,474,000	4,876,000	2,259,000	'
Ownership percentage	26.00%	'	'	'
Other Affiliates [Member]	'	'	'	'
Related Party Transaction [Line Items]	'	'	'	'
Revenues	4,875,000	5,829,000	33,000	'
Expenses	$4,633,000	$3,926,000	$2,558,000	'
The Heritage Trusts [Member]	'	'	'	'
Related Party Transaction [Line Items]	'	'	'	'
Ownership percentage	7.80%	'	'	'
Chairman Fred Fehsenfeld [Member]	'	'	'	'
Related Party Transaction [Line Items]	'	'	'	'
Ownership percentage	5.50%	'	'	'

Segment_Information_Details

Segment Information (Details) (USD $)

3 Months Ended

4 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Sep. 07, 2013

Jun. 15, 2013

Mar. 23, 2013

Sep. 08, 2012

Jun. 16, 2012

Mar. 24, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

segment

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Number of reportable segments

'

'

'

'

'

'

'

'

2

'

'

Revenues

'

'

'

'

'

'

'

'

'

'

'

Product revenues

$32,302

$28,906

$26,558

$31,348

$31,941

$21,215

$44,643

[1]

$34,966

[1]

$132,409

$119,470

$39,149

Service revenues

35,301

34,644

33,449

30,718

30,330

29,294

47,333

[1]

42,679

[1]

150,727

133,021

113,709

Total revenues

67,603

63,550

60,007

62,066

62,271

50,509

91,976

[1]

77,645

[1]

283,136

252,491

152,858

Operating expenses

'

'

'

'

'

'

'

'

'

'

'

Operating costs

55,698

52,201

52,286

52,718

51,908

42,337

74,453

[1]

66,605

[1]

234,638

213,568

124,000

Operating depreciation and amortization

'

'

'

'

'

'

'

'

8,301

7,509

5,023

Profit (loss) before corporate selling, general, and administrative expenses

'

'

'

'

'

'

'

'

40,197

31,414

23,835

Selling, general, and administrative expenses

7,051

7,049

6,591

5,566

6,235

5,756

9,583

[1]

8,637

[1]

30,274

26,194

20,715

Depreciation and amortization from SG&A

'

'

'

'

'

'

'

'

1,223

632

634

Total selling, general, and administrative expenses

'

'

'

'

'

'

'

'

31,497

26,826

21,349

Other expense (income) - net

138

101

-8

9

0

1

-21

[1]

-4

[1]

210

6

-10

Operating income

2,492

2,036

-721

1,869

2,217

643

4,683

[1]

-147

[1]

8,490

4,582

2,496

Interest expense b net

97

107

106

112

146

187

107

[1]

140

[1]

417

585

37

Income before income taxes

'

'

'

'

'

'

'

'

8,073

3,997

2,459

Environmental Services Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

'

'

'

Product revenues

'

'

'

'

'

'

'

'

14,449

11,025

9,064

Service revenues

'

'

'

'

'

'

'

'

142,833

128,129

110,448

Total revenues

'

'

'

'

'

'

'

'

157,282

139,154

119,512

Operating expenses

'

'

'

'

'

'

'

'

'

'

'

Operating costs

'

'

'

'

'

'

'

'

110,459

104,994

90,751

Operating depreciation and amortization

'

'

'

'

'

'

'

'

4,937

4,615

4,218

Profit (loss) before corporate selling, general, and administrative expenses

'

'

'

'

'

'

'

'

41,886

29,545

24,543

Oil Business Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Revenues

'

'

'

'

'

'

'

'

'

'

'

Product revenues

'

'

'

'

'

'

'

'

117,960

108,445

30,085

Service revenues

'

'

'

'

'

'

'

'

7,894

4,892

3,261

Total revenues

'

'

'

'

'

'

'

'

125,854

113,337

33,346

Operating expenses

'

'

'

'

'

'

'

'

'

'

'

Operating costs

'

'

'

'

'

'

'

'

124,179

108,574

33,249

Operating depreciation and amortization

'

'

'

'

'

'

'

'

3,364

2,894

805

Profit (loss) before corporate selling, general, and administrative expenses

'

'

'

'

'

'

'

'

-1,689

1,869

-708

Corporate and Eliminations [Member]

'

'

'

'

'

'

'

'

'

'

'

Operating expenses

'

'

'

'

'

'

'

'

'

'

'

Selling, general, and administrative expenses

'

'

'

'

'

'

'

'

30,274

26,194

20,715

Depreciation and amortization from SG&A

'

'

'

'

'

'

'

'

1,223

632

634

Total selling, general, and administrative expenses

'

'

'

'

'

'

'

'

31,497

26,826

21,349

Other expense (income) - net

'

'

'

'

'

'

'

'

210

6

-10

Interest expense b net

'

'

'

'

'

'

'

'

$417

$585

$37

Revenues [Member] | Environmental Services Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Concentration risk, percentage

'

'

'

'

'

'

'

'

0.00%

0.00%

0.00%

Revenues [Member] | Oil Business Segment [Member]

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Concentration risk, percentage

'

'

'

'

'

'

'

'

0.00%

0.00%

15.40%

[1]

Reflects a sixteen week quarter.

Segment_Information_Assets_and

Segment Information (Assets and Capital Expenditures) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'
Assets	$215,958	$199,111	'
Payments for Capital Improvements	39,569	23,056	45,615
Environmental Services Segment [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Assets	80,451	57,092	'
Payments for Capital Improvements	18,882	5,924	5,898
Oil Business Segment [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Assets	110,040	87,222	'
Payments for Capital Improvements	20,549	15,225	37,903
Corporate Unallocated Assets [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Assets	25,467	54,797	'
Payments for Capital Improvements	$138	$1,907	$1,814

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
COMMITMENTS AND CONTINGENCIES [Abstract]	'	'	'
Purchase obligation	$16,700,000	'	'
Loss contingency accrual	400,000	200,000	'
Rent expense	20,400,000	17,400,000	12,200,000
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]	'	'	'
2014	16,141,000	'	'
2015	14,345,000	'	'
2016	12,190,000	'	'
2017	10,989,000	'	'
2018	9,703,000	'	'
Thereafter	12,034,000	'	'
Total	$75,402,000	'	'

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Net operating loss carryforward	$33,600,000	'	$44,700,000
Deferred tax asset related to the Company's NOL	12,073,000	13,662,000	'
Excess tax benefits from share-based compensation	$800,000	'	'
Effective income tax rate, percent	42.50%	43.60%	'

Income_Taxes_Components_of_Inc

Income Taxes (Components of Income Tax Expense) (Details) (USD $)

3 Months Ended

4 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Sep. 07, 2013

Jun. 15, 2013

Mar. 23, 2013

Sep. 08, 2012

Jun. 16, 2012

Mar. 24, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Current:

'

'

'

'

'

'

'

'

'

'

'

Federal

'

'

'

'

'

'

'

'

$21

$127

($1,643)

State

'

'

'

'

'

'

'

'

171

338

-147

Total current

'

'

'

'

'

'

'

'

192

465

-1,790

Deferred:

'

'

'

'

'

'

'

'

'

'

'

Federal

'

'

'

'

'

'

'

'

2,679

1,443

2,604

State

'

'

'

'

'

'

'

'

557

-165

171

Total deferred

'

'

'

'

'

'

'

'

3,236

1,278

2,775

Income tax provision

1,061

872

-407

723

853

186

1,902

[1]

-19

[1]

3,428

1,743

985

Effective Income Tax Rate Reconciliation, Amount [Abstract]

'

'

'

'

'

'

'

'

'

'

'

Tax at statutory federal rate

'

'

'

'

'

'

'

'

2,745

1,359

'

State and local tax, net of federal benefit

'

'

'

'

'

'

'

'

508

257

'

Other

'

'

'

'

'

'

'

'

$175

$127

'

[1]

Reflects a sixteen week quarter.

Income_Taxes_Deferred_Tax_Asse

Income Taxes (Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 28, 2013	Dec. 29, 2012
In Thousands, unless otherwise specified
Deferred tax assets	'	'
Net Operating Loss Carryforward	$12,073	$13,662
Stock compensation	1,573	1,448
Tax intangible assets	1,355	1,526
Reserves and Accruals	1,202	698
Income tax credits	706	574
Allowance for Doubtful Accounts	463	496
Total deferred tax asset	17,372	18,404
Deferred tax liabilities	'	'
Prepaids	-602	-471
Depreciation and amortization	-25,004	-22,931
Total deferred tax liability	-25,606	-23,402
Net deferred tax liability	-8,234	-4,998
Deferred income taxes	1,004	759
Net non-current deferred tax liability	($9,238)	($5,757)

Income_Taxes_Unrecognized_Tax_

Income Taxes (Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'
Beginning balance	$194	$0
Additions Based on Current Year's Tax Positions	30	19
Additions from Prior Year's Tax Positions	49	175
Ending balance	$273	$194

Sharebased_Compensation_Detail

Share-based Compensation (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Share-based Compensation [Abstract]	'	'	'
Number of shares authorized	1,902,077	'	'
Number of shares available for grant	777,842	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation	$1,367,000	$1,066,000	$1,060,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]	'	'	'
Less: Shares vested during period (options)	-69,782	-45,599	'
Less: Shares vested during period, grant date fair value (in dollars per share)	$16.55	$13.80	'
2009 Stock Options [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation	100,000	100,000	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'	'
Beginning balance (options)	629,048	771,337	'
Exercised (options)	-49,434	-142,289	'
Ending balance (options)	579,614	629,048	771,337
Beginning, Weighted average exercise price (in dollars per share)	$10.76	$10.83	'
Exercised, Weighted average exercise price (in dollars per share)	$8.06	$11.15	'
Ending, Weighted average exercise price (in dollars per share)	$10.98	$10.76	$10.83
Weighted average remaining contractual term (in years)	'4 years 4 months 6 days	'5 years 4 months 26 days	'6 years 4 months 18 days
Aggregate intrinsic value as of date listed	5,133,000	2,607,000	4,421,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]	'	'	'
Nonvested stock options, beginning (options)	39,403	78,805	'
Less: Shares vested during period (options)	-39,403	-39,402	'
Nonvested stock options, ending (options)	0	39,403	78,805
Nonvested stock options, beginning, grant date fair value (in dollars per share)	$3.24	$3.24	'
Less: Shares vested during period, grant date fair value (in dollars per share)	$3.24	$3.24	'
Nonvested stock options, ending, grant date fair value (in dollars per share)	'	$3.24	$3.24
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'	'
Expected volatility	41.60%	'	'
Risk-free interest rate	2.40%	'	'
Dividend yield	0.00%	'	'
Expected life (in years)	'6 years 3 months	'	'
Option vesting period	'4 years	'	'
2012 Performance Grant [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation	100,000	100,000	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'	'
Option vesting period	'3 years	'	'
Compensation cost not yet recognized	$100,000	$100,000	'

Sharebased_Compensation_Restri

Share-based Compensation (Restricted Stock) (Details) (USD $)

12 Months Ended

1 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

31-May-13

Feb. 28, 2007

Dec. 28, 2013

13-May-13

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Dec. 29, 2012

Oct. 31, 2011

Mar. 31, 2011

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Feb. 29, 2012

Dec. 28, 2013

Dec. 29, 2012

Dec. 31, 2011

Feb. 07, 2013

Dec. 28, 2013

Dec. 29, 2012

Dec. 28, 2013

2007 Performance Grant [Member]

2007 Performance Grant [Member]

2007 Performance Grant [Member]

2013 Board of Director Stock [Member]

2013 Board of Director Stock [Member]

2013 Board of Director Stock [Member]

2013 Board of Director Stock [Member]

Board of Director Stock [Member]

2010 LTI Grant [Member]

2010 LTI Grant [Member]

2010 LTI Grant [Member]

2010 LTI Grant [Member]

2010 LTI Grant [Member]

2011 LTI Grant [Member]

2011 LTI Grant [Member]

2011 LTI Grant [Member]

2011 LTI Grant [Member]

2012 Performance Grant [Member]

2012 Performance Grant [Member]

2012 Performance Grant [Member]

2013 Long Term Incentive Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Award vesting period

'

'

'

'

'

'

'

'1 year

'

'

'

'

'

'3 years

'

'

'

'3 years

'

'

'

'3 years

'

'

Share-based compensation, shares granted

'

'

'

'

55,000

'

18,666

'

'

'

'

12,783

92,909

'

'

'

59,502

'

'

'

10,000

'

'

'

Share-based compensation

$1,367,000

$1,066,000

$1,060,000

'

'

$100,000

'

$300,000

$300,000

$200,000

'

'

'

$400,000

$300,000

$400,000

'

$300,000

$300,000

$300,000

'

$100,000

$100,000

$600,000

Vested, shares

-69,782

-45,599

'

-11,000

'

'

'

'

'

'

-11,493

'

'

'

'

'

'

'

'

'

'

'

'

'

Compensation cost not yet recognized

'

'

'

'

'

'

'

'

'

'

'

'

'

$100,000

$400,000

'

'

$300,000

$700,000

'

'

$100,000

$100,000

$1,700,000

Sharebased_Compensation_Restri1

Share-based Compensation (Restricted Stock Rollforward) (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'	'	'
Nonvested shares outstanding, beginning	100,052	141,269	114,038
Granted, shares	28,666	73,032	'
Vested, shares	-69,782	-45,599	'
Forfeited, shares	-101	-202	'
Nonvested shares outstanding, ending	100,052	141,269	114,038
Nonvested shares outstanding, Weighted average grant date fair value, per share	$17.11	$12.82	'
Granted, Weighted average grant date fair value, per share	$15.26	$21.74	'
Vested, Weighted average grant date fair value, per share	$16.55	$13.80	'
Forfeited, Weighted average grant date fair value, per share	$16.53	$16.53	'
Nonvested Shares outstanding, ending, Weighted average grant date fair value, per share	$16.97	$17.11	'

Sharebased_Compensation_ESPP_D

Share-based Compensation (ESPP) (Details) (Employee Stock Purchase Plan of 2008 [Member], Employee Stock [Member], USD $)	12 Months Ended
	Dec. 28, 2013
Employee Stock Purchase Plan of 2008 [Member] | Employee Stock [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Eligibility service requirement (in hours)	'20 hours
Discounted purchase price, percent	95.00%
Employee payroll deductions, percent	10.00%
Employee maximum annual contribution	$25,000
Employee stock purchase plan, shares available	39,207
Shares purchased during the year	29,350
Employee stock purchase plan, weighted average fair value per share	$15.75

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	3 Months Ended	12 Months Ended			0 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 16, 2012	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jul. 19, 2013		Jun. 26, 2013
					RTI [Member]		RFTI [Member]
Class of Stock [Line Items]	'	'	'	'	'		'
Net cash paid	'	'	'	'	$2,870	[1]	$4,920	[1]
Common stock issued	'	'	'	'	1,000	[1]	1,230	[1]
Equity interest, shares	'	'	'	'	69,322		82,000
Note payable	'	21,029	'	'	430	[1]	'
Issuance of common stock b net of issuance costs, shares	3,400,000	'	'	'	'		'
Shares issued, price per share	$20.50	'	'	'	'		'
Issuance of common stock - net of issuance costs	65,482	'	65,482	'	'		'
Repayments of revolving credit facility	$12,400	$0	($28,180)	$0	'		'
[1]	The Company is continuing to evaluate the purchase price allocations. Preliminary purchase price allocations are tentative and subject to revision as the Company finalizes appraisals and other analyses. Final determination of the fair values may result in further adjustments to the values presented above.

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended						4 Months Ended				12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 07, 2013	Jun. 15, 2013	Mar. 23, 2013	Sep. 08, 2012	Jun. 16, 2012	Mar. 24, 2012	Dec. 28, 2013		Dec. 29, 2012		Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]	'	'	'	'	'	'	'		'		'	'	'
Net income	$1,334	$1,057	($420)	$1,034	$1,218	$270	$2,674	[1]	($268)	[1]	$4,645	$2,254	$1,474
Income attributable to noncontrolling interest	26	26	20	0	0	0	28	[1]	0	[1]	100	0	0
Net Income (Loss) Attributable to Parent	$1,308	$1,031	($440)	$1,034	$1,218	$270	$2,646	[1]	($268)	[1]	$4,545	$2,254	$1,474
Number of weighted average shares outstanding: basic	18,272	18,138	18,113	18,060	16,689	14,486	18,335	[1]	18,067	[1]	18,224	16,921	14,313
Dilutive shares for sharebbased compensation plans	'	'	'	'	'	'	'		'		328	442	397
Weighted average diluted shares outstanding	18,585	18,456	18,113	18,412	17,140	14,962	18,677	[1]	18,067	[1]	18,552	17,363	14,710
Net income per share: basic (in dollars per share)	$0.07	$0.06	($0.02)	$0.06	$0.07	$0.02	$0.15		($0.01)		$0.25	$0.13	$0.10
Net income per share: diluted (in dollars per share)	$0.07	$0.06	($0.02)	$0.06	$0.07	$0.02	$0.14		($0.01)		$0.24	$0.13	$0.10
[1]	Reflects a sixteen week quarter.

Selected_Quarterly_Financial_D2

Selected Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended						4 Months Ended				12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 07, 2013	Jun. 15, 2013	Mar. 23, 2013	Sep. 08, 2012	Jun. 16, 2012	Mar. 24, 2012	Dec. 28, 2013		Dec. 29, 2012		Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Revenues	'	'	'	'	'	'	'		'		'	'	'
Product revenues	$32,302	$28,906	$26,558	$31,348	$31,941	$21,215	$44,643	[1]	$34,966	[1]	$132,409	$119,470	$39,149
Service revenues	35,301	34,644	33,449	30,718	30,330	29,294	47,333	[1]	42,679	[1]	150,727	133,021	113,709
Total revenues	67,603	63,550	60,007	62,066	62,271	50,509	91,976	[1]	77,645	[1]	283,136	252,491	152,858
Operating expenses	'	'	'	'	'	'	'		'		'	'	'
Operating costs	55,698	52,201	52,286	52,718	51,908	42,337	74,453	[1]	66,605	[1]	234,638	213,568	124,000
Selling, general, and administrative expenses	7,051	7,049	6,591	5,566	6,235	5,756	9,583	[1]	8,637	[1]	30,274	26,194	20,715
Depreciation and amortization	2,224	2,163	1,859	1,904	1,911	1,772	3,278	[1]	2,554	[1]	9,524	8,141	5,657
Other expense (income) - net	138	101	-8	9	0	1	-21	[1]	-4	[1]	210	6	-10
Operating income	2,492	2,036	-721	1,869	2,217	643	4,683	[1]	-147	[1]	8,490	4,582	2,496
Interest expense b net	97	107	106	112	146	187	107	[1]	140	[1]	417	585	37
Income before income taxes	2,395	1,929	-827	1,757	2,071	456	4,576	[1]	-287	[1]	8,073	3,997	2,459
Provision for income taxes	1,061	872	-407	723	853	186	1,902	[1]	-19	[1]	3,428	1,743	985
Net income	1,334	1,057	-420	1,034	1,218	270	2,674	[1]	-268	[1]	4,645	2,254	1,474
Income attributable to noncontrolling interest	26	26	20	0	0	0	28	[1]	0	[1]	100	0	0
Income attributable to Heritage-Crystal Clean, Inc. common stockholders	1,308	1,031	-440	1,034	1,218	270	2,646	[1]	-268	[1]	4,545	2,254	1,474
Net income per share: basic	$0.07	$0.06	($0.02)	$0.06	$0.07	$0.02	$0.15		($0.01)		$0.25	$0.13	$0.10
Net income per share: diluted	$0.07	$0.06	($0.02)	$0.06	$0.07	$0.02	$0.14		($0.01)		$0.24	$0.13	$0.10
Number of weighted average shares outstanding: basic	18,272	18,138	18,113	18,060	16,689	14,486	18,335	[1]	18,067	[1]	18,224	16,921	14,313
Number of weighted average shares outstanding: diluted	18,585	18,456	18,113	18,412	17,140	14,962	18,677	[1]	18,067	[1]	18,552	17,363	14,710
Average revenues per working day - Environmental Services	$625	$600	$580	$555	$545	$515	$650	[1]	$570	[1]	'	'	'
[1]	Reflects a sixteen week quarter.