10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)
x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the quarterly period ended	September 7, 2019
	OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from _________________to _________________

Commission File Number001-33987

HERITAGE-CRYSTAL CLEAN, INC.

(Exact name of registrant as specified in its charter)

Delaware	26-0351454
State or other jurisdiction of	(I.R.S. Employer
Incorporation	Identification No.)

2175 Point Boulevard

Suite 375

Elgin, IL 60123

(Address of principal executive offices and zip code)  

Registrant’s telephone number, including area code: (847) 836-5670

Securities registered pursuant to Section 12(b) of the Act:
Title of each Class	Trading Symbol	Name of Exchange on which registered
Common Stock, par value $0.01 per share	HCCI	NASDAQ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes x No o

1

Indicate by check mark whether the registrant has submitted electronically, every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).   Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.  See definitions of “large accelerated filer,” “accelerated filer,” "smaller reporting company," and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer o		Accelerated filer x
Non-accelerated filer o	(Do not check if a smaller reporting company)	Smaller reporting company   o
		Emerging growth company   o
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o No x

On October 14, 2019, there were outstanding 23,186,061 shares of Common Stock, $0.01 par value, of Heritage-Crystal Clean, Inc.

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Table of Contents

PART I
ITEM 1.   FINANCIAL STATEMENTS	4
ITEM 2.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	30
ITEM 3.   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	37
ITEM 4.   CONTROLS AND PROCEDURES	37
PART II
ITEM 1. LEGAL PROCEEDINGS	38
ITEM 6. EXHIBITS	39
SIGNATURES	40

3

PART I

ITEM 1. FINANCIAL STATEMENTS

Heritage-Crystal Clean, Inc.

Condensed Consolidated Balance Sheets

(In Thousands, Except Share and Par Value Amounts)

	September 7, 2019		December 29, 2018
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	58,951	$	43,579
Accounts receivable - net	55,653		51,744
Inventory - net	28,259		33,059
Other current assets	7,186		6,835
Total current assets	150,049		135,217
Property, plant and equipment - net	145,954		139,987
Right of use assets	79,498		—
Equipment at customers - net	24,159		23,814
Software and intangible assets - net	16,149		14,681
Goodwill	32,744		34,123
Total assets	$	448,553	$	347,822
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable	$	35,089	$	32,630
Current portion of lease liabilities	20,257		—
Contract liabilities - net	2,332		166
Accrued salaries, wages, and benefits	6,051		6,024
Taxes payable	7,112		6,120
Other current liabilities	4,989		5,089
Total current liabilities	75,830		50,029
Lease liabilities, net of current portion	59,291		—
Long-term debt	29,255		29,046
Deferred income taxes	17,870		14,516
Total liabilities	$	182,246	$	93,591
STOCKHOLDERS' EQUITY:
Common stock - 26,000,000 shares authorized at $0.01 par value, 23,185,567 shares and 23,058,584 shares issued and outstanding at September 7, 2019 and December 29, 2018, respectively	$	232	$	231
Additional paid-in capital	199,216		197,533
Retained earnings	66,333		55,819
Total Heritage-Crystal Clean, Inc. stockholders' equity	265,781		253,583
Noncontrolling interest	526		648
Total equity	266,307		254,231
Total liabilities and stockholders' equity	$	448,553	$	347,822

See accompanying notes to financial statements.

4

Heritage-Crystal Clean, Inc.

Condensed Consolidated Statements of Income

(In Thousands, Except per Share Amounts)

(Unaudited)

		Third Quarter Ended,				First Three Quarters Ended,
		September 7, 2019		September 8, 2018		September 7, 2019		September 8, 2018
Revenues
	Service revenues	$	57,208	$	58,054	$	171,522	$	172,205
	Product revenues	41,964		41,620		119,124		110,918
	Rental income	5,668		—		14,967		—
Total revenues		$	104,840	$	99,674	$	305,613	$	283,123
Operating expenses
	Operating costs	$	80,116	$	76,045	$	241,449	$	220,702
	Selling, general, and administrative expenses	11,241		10,641		34,679		33,185
	Depreciation and amortization	3,980		3,776		12,176		11,078
	Other expense - net	1,020		253		2,477		983
Operating income		8,483		8,959		14,832		17,175
Interest expense – net		181		256		629		742
Income before income taxes		8,302		8,703		14,203		16,433
Provision for income taxes		2,246		2,284		3,411		3,996
Net income		6,056		6,419		10,792		12,437
Income attributable to noncontrolling interest		86		74		278		213
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders		$	5,970	$	6,345	$	10,514	$	12,224
Net income per share: basic		$	0.26	$	0.28	$	0.45	$	0.53
Net income per share: diluted		$	0.25	$	0.27	$	0.45	$	0.52
Number of weighted average shares outstanding: basic		23,185		23,048		23,146		23,013
Number of weighted average shares outstanding: diluted		23,421		23,404		23,384		23,299

See accompanying notes to financial statements.

5

Heritage-Crystal Clean, Inc.

Condensed Consolidated Statement of Stockholders’ Equity

(In Thousands, Except Share Amounts)

For the Third Quarter Ended September 7, 2019 and September 8, 2018

(Unaudited)

Third Quarter Ended,
September 7, 2019
	Shares	Par Value Common		Additional Paid–in Capital		Retained Earnings		Total Heritage-Crystal Clean, Inc. Stockholders' Equity		Non-controlling Interest		Total Equity
Balance at June 15, 2019	23,180,320	$	232	$	198,074	$	60,363	$	258,669	$	440	$	259,109
Net income	—	—		—		5,970		5,970		86		6,056
Issuance of common stock – ESPP	4,789	—		120		—		120		—		120
Share-based compensation	458	—		1,022		—		1,022		—		1,022
Balance at September 7, 2019	23,185,567	$	232	$	199,216	$	66,333	$	265,781	$	526	$	266,307
Third Quarter Ended,
September 8, 2018
	Shares	Par Value Common		Additional Paid–in Capital		Retained Earnings		Total Heritage-Crystal Clean, Inc. Stockholders' Equity		Non-controlling Interest		Total Equity
Balance at June 16, 2018	23,042,972	$	230	$	194,774	$	46,970	$	241,974	$	476	$	242,450
Net income	—	—		—		6,345		6,345		74		6,419
Issuance of common stock – ESPP	5,529	1		106		—		107		—		107
Exercise of stock options	1,608	—		12		—		12		—		12
Share-based compensation	—	—		1,190		—		1,190		—		1,190
Balance at September 8, 2018	23,050,109	$	231	$	196,082	$	53,315	$	249,628	$	550	$	250,178

6

Condensed Consolidated Statement of Stockholders’ Equity

(In Thousands, Except Share Amounts)

For the First Three Quarters Ended September 7, 2019 and September 8, 2018

(Unaudited)

First Three Quarters Ended,
September 7, 2019
	Shares	Par Value Common		Additional Paid–in Capital			Retained Earnings			Total Heritage-Crystal Clean, Inc. Stockholders' Equity			Non-controlling Interest			Total Equity
Balance at December 29, 2018	23,058,584	$	231	$	197,533		$	55,819		$	253,583		$	648		$	254,231
Net income	—	—		—			10,514			10,514			278			10,792
Distributions	—	—		—			—			—			(400		)	(400		)
Issuance of common stock – ESPP	14,240	—		348			—			348			—			348
Exercise of stock options	2,760	—		20			—			20			—			20
Share-based compensation	109,983	1		2,742			—			2,743			—			2,743
Share repurchases to satisfy tax withholding obligations	—	—		(1,427		)	—			(1,427		)	—			(1,427		)
Balance at September 7, 2019	23,185,567	$	232	$	199,216		$	66,333		$	265,781		$	526		$	266,307
First Three Quarters Ended,
September 8, 2018
	Shares	Par Value Common		Additional Paid–in Capital			Retained Earnings			Total Heritage-Crystal Clean, Inc. Stockholders' Equity			Non-controlling Interest			Total Equity
Balance at December 30, 2017	22,891,674	$	229	$	193,640		$	41,359		$	235,228		$	698		$	235,926
Adjustment from adopting ASC 606	—	—		—			(268		)	(268		)	—			(268		)
Net income	—	—		—			12,224			12,224			213			12,437
Distribution	—	—		—			—			—			(361		)	(361		)
Issuance of common stock – ESPP	15,170	—		311			—			311			—			311
Exercise of stock options	14,048	—		103			—			103			—			103
Share-based compensation	129,217	2		3,058			—			3,060			—			3,060
Share repurchases to satisfy tax withholding obligations	—	—		(1,030		)	—			(1,030		)	—			(1,030		)
Balance at September 8, 2018	23,050,109	$	231	$	196,082		$	53,315		$	249,628		$	550		$	250,178

See accompanying notes to financial statements.

7

Heritage-Crystal Clean, Inc.

Condensed Consolidated Statements of Cash Flows

(In Thousands)

(Unaudited)

	First Three Quarters Ended,
	September 7, 2019			September 8, 2018
Cash flows from Operating Activities:
Net income	$	10,792		$	12,437
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	12,176			11,078
Bad debt provision	829			177
Share-based compensation	2,743			3,060
Deferred taxes	3,354			3,998
Other, net	594			215
Changes in operating assets and liabilities:
Increase in accounts receivable	(4,344		)	(4,780		)
Decrease (increase) in inventory	5,136			(7,845		)
Increase in other current assets	(351		)	(851		)
Increase in accounts payable	2,005			5,670
Increase (decrease) in accrued liabilities	3,391			(157		)
Cash provided by operating activities	$	36,325		$	23,002
Cash flows from Investing Activities:
Capital expenditures	$	(16,921	)	$	(12,874	)
Business acquisitions, net of cash acquired	(2,573		)	(4,805		)
Proceeds from the disposal of assets	—			80
Cash used in investing activities	$	(19,494	)	$	(17,599	)
Cash flows from Financing Activities:
Proceeds from the exercise of stock options	$	20		$	103
Share repurchases to satisfy tax withholding obligations	(1,427		)	(1,030		)
Proceeds from the issuance of common stock	348			311
Distributions to noncontrolling interest	(400		)	(361		)
Cash used in financing activities	$	(1,459	)	$	(977	)
Net increase in cash and cash equivalents	15,372			4,426
Cash and cash equivalents, beginning of period	43,579			41,889
Cash and cash equivalents, end of period	$	58,951		$	46,315
Supplemental disclosure of cash flow information:
Income taxes paid	$	1,205		$	371
Cash paid for interest	971			846
Supplemental disclosure of non-cash information:
Payables for construction in progress	$	904		$	526

See accompanying notes to financial statements.

8

HERITAGE-CRYSTAL CLEAN, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

September 7, 2019

(1)    ORGANIZATION AND NATURE OF OPERATIONS

Heritage-Crystal Clean, Inc., a Delaware corporation and its subsidiaries (collectively the “Company”), provide parts cleaning, hazardous and non-hazardous containerized waste, used oil collection, vacuum, antifreeze recycling and field services primarily to small and mid-sized industrial and vehicle maintenance customers. The Company 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 products. The Company also has multiple locations where it dehydrates used oil. The oil processed at these locations is sold as recycled fuel oil. The Company also operates multiple wastewater treatment plants and antifreeze recycling facilities at which it produces virgin-quality antifreeze. The Company's locations are in the United States and Ontario, Canada. 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 has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists of the Company's parts cleaning, containerized waste management, vacuum truck services, antifreeze recycling activities, and field services. The Oil Business segment consists of the Company's used oil collection, recycled fuel oil sales, used oil re-refining activities, and used oil filter removal and disposal services. No customer represented greater than 10% of consolidated revenues for any of the periods presented. There were no intersegment revenues. Both segments operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

The Company’s fiscal year ends on the Saturday closest to December 31. The most recent fiscal year ended on December 29, 2018. 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; service revenues include servicing of parts cleaning machines, drum waste removal services, vacuum truck services, field services, and other services; rental income includes embedded lease income from certain of our parts cleaning contracts. In the Company's Oil Business segment, product revenues primarily consist of sales of re-refined base oil, re-refinery co-products and recycled fuel oil; service revenues include revenues from used oil collection activities, collecting and disposing of waste water and removal and disposal of used oil filters. Due to the Company's integrated business model, it is impracticable to separately present costs of tangible products and costs of services.

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(2)    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The Company's significant accounting policies are described in Note 2, "Summary of Significant Accounting Policies," in the Company's Annual Report on Form 10-K for the fiscal year ended December 29, 2018. There have been no material changes in these policies or their application during the first three quarters of fiscal 2019 with the exception of our accounting for leases. See footnote 12 — Commitments and Contingencies for more information.

Recently Issued Accounting Pronouncements
Standard	Issuance Date	Description	Our Effective Date	Effect on the Financial Statements
ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.”	June 2016	This update modifies the impairment model for most financial assets and certain other instruments. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities will be required to utilize a new forward-looking “expected loss” methodology that generally will result in the earlier recognition of allowance for losses.	December 29, 2019	The Company is evaluating the impact this new standard would have on our consolidated financial statements.

Recently Issued Accounting Standards Adopted
Standard	Issuance Date	Description	Effective Date	Effect on the Financial Statements
ASU 2016-02 Leases (Topic 842), and subsequent updates	February 2016	This update was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. Early application of the amendments in this update is permitted for all entities.	December 30, 2018	The Company adopted the new leasing standard ASC 842 "Leases" on December 30, 2018. ASU 2016-02 provides for a modified retrospective transition  approach requiring lessees to recognize and measure leases on the balance sheet at the beginning of either the earliest period presented or as of the beginning of the period of adoption. The Company elected to apply ASU 2016-02 as of the beginning of the period of adoption (December 30, 2018) and will not restate comparative periods. The adoption resulted in the recognition of $63.3 million of right of use assets and $63.3 million of lease liabilities. The Company recognized approximately $2.2 million of deferred rental income from certain embedded leases during the first quarter of 2019.

10

Effective December 30, 2018, the Company adopted the requirements of Topic 842. The cumulative effects of the changes made to our Statement of Income and Balance Sheet are as follows:

	For the Third Quarter Ended, September 7, 2019							For the First Three Quarters Ended, September 7, 2019
	As Reported		Balances Without Adoption of Topic 842		Effect of Change			As Reported		Balances Without Adoption of Topic 842		Effect of Change
(thousands, except per share amounts)					Higher/(Lower)							Higher/(Lower)
Statement of Income
Service revenues	$	57,208	$	62,843	$	(5,635	)	$	171,522	$	188,614	$	(17,092	)
Rental income	5,668		—		5,668			14,967		—		14,967
Total revenues	104,840		104,807		33			305,613		307,738		(2,125		)
Operating income	8,483		8,450		33			14,832		16,957		(2,125		)
Income before income taxes	8,302		8,269		33			14,203		16,328		(2,125		)
Provision for income taxes	2,246		2,237		9			3,411		3,921		(510		)
Net income	6,056		6,032		24			10,792		12,407		(1,615		)
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$	5,970	$	5,946	$	24		$	10,514	$	12,129	$	(1,615	)
Net income per share: basic	$	0.26	$	0.26	$	—		$	0.45	$	0.52	$	(0.07	)
Net income per share: diluted	$	0.25	$	0.25	$	—		$	0.45	$	0.52	$	(0.07	)

	September 7, 2019
	As Reported		Balances Without Adoption of Topic 842		Effect of Change
(thousands)					Higher/(Lower)
Balance Sheet
Right of use assets	$	79,498	$	—	$	79,498
Total assets	448,553		369,055		79,498
Current portion of lease liabilities	20,257		—		20,257
Contract liabilities - net	2,332		207		2,125
Other current liabilities	4,989		5,039		(50		)
Total current liabilities	75,830		53,498		22,332
Lease liabilities, net of current portion	59,291		—		59,291
Deferred income taxes	17,870		18,380		(510		)
Total liabilities	182,246		101,133		81,113
Retained earnings	66,333		67,948		(1,615		)
Heritage-Crystal Clean, Inc. stockholders' equity	265,781		267,396		(1,615		)
Total equity	266,307		267,922		(1,615		)
Total liabilities and stockholders' equity	$	448,553	$	369,055	$	79,498

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(3)    BUSINESS COMBINATIONS

On March 25, 2019, the Company completed the acquisition of certain assets of All Valley Disposal, Inc., an environmental services provider based in Fresno, California. Consideration for the acquisition paid at closing was $0.6 million. Contingent upon the achievement of certain business performance metrics, total consideration for the acquisition could reach a maximum of approximately $1.3 million. We are still in the process of completing our valuation, and accordingly our estimates and assumptions are subject to change within the measurement period. The Company is continuing to examine facts and circumstances that existed at the acquisition date and how those affect the estimated fair value of working capital, and the allocation of the estimated purchase price to other tangible and intangible assets. The results of All Valley Disposal are consolidated into the Company’s Environmental Services segment.

On February 1, 2019, the Company purchased the assets of W.S. Supplies, Inc. ("WSS") pursuant to an Asset Purchase Agreement. The Company purchased the assets of WSS to expand the Company’s Environmental Services segment in the mid-west. The purchase price was set at $0.5 million subject to certain adjustments, including a contingent consideration provision, and is preliminarily allocated based on our estimates and assumptions of the approximate fair values of assets acquired on the acquisition date. We are still in the process of completing our valuation, and accordingly our estimates and assumptions are subject to change within the measurement period. The Company is continuing to examine facts and circumstances that existed at the acquisition date and how those affect the estimated fair value of working capital, and the allocation of the estimated purchase price to other tangible and intangible assets. The results of WSS are consolidated into the Company’s Environmental Services segment.

On January 11, 2019, the Company purchased the assets of the consumer division of GlyEco, Inc. ("GlyEco") pursuant to an Asset Purchase Agreement. The Company purchased the assets of GlyEco's consumer division to expand the Company’s antifreeze line of business while expanding geographically. The purchase price was set at $1.6 million subject to certain adjustments, including working capital adjustments, and is preliminarily allocated based on our estimates and assumptions of the approximate fair values of assets acquired on the acquisition date. We are still in the process of completing our valuation, and accordingly our estimates and assumptions are subject to change within the measurement period. The Company is continuing to examine facts and circumstances that existed at the acquisition date and how those affect the estimated fair value of working capital, and the allocation of the estimated purchase price to other tangible and intangible assets. The results of GlyEco are consolidated into the Company’s Environmental Services segment.

On May 3, 2018, the Company purchased the assets of Products Plus, Inc. and AO Holding Company-Kansas City, LLC (collectively "PPI") pursuant to an Asset Purchase Agreement. The Company purchased the assets of PPI to expand the Company’s market share in the collection, recycling, and sales of a full line of antifreeze products. The purchase price was set at $5.9 million subject to certain adjustments, including a working capital adjustment and a contingent consideration provision. During the measurement period, the Company finalized the purchase price allocation of the PPI business combination. Compared to the provisional values reported as of December 29, 2018, the fair values presented in the table below reflect increases to property, plant, & equipment of $0.2 million and other intangible assets of $1.5 million. Compared to the provisional values reported as of December 29, 2018, the finalized fair values presented in the table below reflect decreases to contingent consideration of $0.1 million and goodwill of $1.8 million. Contingent consideration to be paid subsequent to September 7, 2019 is contingent upon several business performance metrics over the three-year period starting with the acquisition date and ending May 3, 2021. The range of the potential contingent consideration, which is to be paid out subsequent to September 7, 2019, is between zero and $1.5 million. Goodwill recognized from the acquisition of PPI represents the excess of the estimated purchase consideration transferred over the estimated fair value of the assets acquired. Factors leading to goodwill being recognized are the Company's expectations of synergies from combining operations of PPI and the Company as well as the value of intangible assets that are not separately recognized, such as assembled workforce. The results of PPI are consolidated into the Company’s Environmental Services segment.

On June 11, 2018, the Company purchased the assets of Kurt Lanse d/b/a Hot Tank Supply Company ("HTSC") pursuant to an Asset Purchase Agreement. The Company purchased the assets of HTSC to expand the Company’s market share in California. The purchase price was set at $0.7 million subject to certain adjustments, including a working capital adjustment and a deferred and contingent consideration provision, and is allocated based on our estimates and assumptions of the approximate fair values of assets acquired on the acquisition date. The Company estimates that contingent consideration to be paid subsequent to September 7, 2019 will be approximately $0.1 million. Goodwill recognized from the acquisition of HTSC represents the excess of the estimated purchase consideration transferred over the estimated fair value of the assets acquired. Factors leading to goodwill being recognized are the Company's expectations of synergies from combining operations of HTSC and the Company as well as the value of intangible assets that are not separately recognized, such as assembled workforce. The results of HTSC are consolidated into the Company’s Environmental Services segment.

12

The following table summarizes the estimated fair values of the assets acquired, some of which are preliminary, related to each acquisition:

	As of September 7, 2019
(thousands)	All Valley Disposal		GlyEco		WSS		PPI			HTSC
Accounts receivable	$	36	$	359	$	—	$	909		$	40
Inventory	18		290		28		259			3
Property, plant, & equipment	252		746		154		2,154			47
Equipment at customers	—		—		24		—			104
Intangible assets	310		251		298		2,001			100
Goodwill	384		—		—		406			377
Total purchase price, net of cash acquired	$	1,000	$	1,646	$	504	$	5,729		$	671
Less: working capital adjustment	—		23		14		(62		)	(9		)
Less: deferred consideration	—		—		—		—			225
Less: contingent consideration	300		—		90		1,341			100
Less: to be placed in escrow	100		—		50		—			—
Net cash paid	$	600	$	1,623	$	350	$	4,450		$	355

Unaudited Pro-forma Financial Information

Pro forma financial information was not presented as results were immaterial to the Company's consolidated results for the first three quarters ended September 7, 2019.

13

(4) REVENUE

We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when our performance obligations under the terms of a contract with our customers are satisfied. Recognition occurs when the Company transfers control by completing the specified services at the point in time the customer benefits from the services performed or once our products are delivered. The Company measures progress toward complete satisfaction of a performance obligation satisfied over time using a cost-based input method. This method of measuring progress provides a faithful depiction of the transfer of goods or services because the costs incurred are expected to be substantially proportionate to the Company’s satisfaction of the performance obligation. Revenue is measured as the amount of consideration we expect to receive in exchange for completing our performance obligations. Sales tax and other taxes we collect with revenue-producing activities are excluded from revenue. In the case of contracts with multiple performance obligations, the Company allocates the transaction price to each performance obligation based on the relative stand-alone selling prices of the various goods and/or services encompassed by the contract. We do not have any material significant payment terms as payment is generally due within 30 days after the performance obligation has been satisfactorily completed. The Company has elected the practical expedient to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less. In applying the guidance in Topic 606, there were no judgments or estimates made that the Company deems significant.

Accounts Receivable — Net, includes amounts billed and currently due from customers. The amounts due are stated at their net estimated realizable value. 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 and historical losses. Accounts receivable are written off once the Company determines the account to be uncollectible. The Company does not have any off-balance-sheet credit exposure related to its customers.

Contract Balances — Contract assets primarily relate to the Company’s rights to consideration for work completed in relation to its services performed but not billed at the reporting date. Contract liabilities primarily consist of advance payments of performance obligations yet to be fully satisfied in the period reported. Our contract liabilities and contract assets are reported in a net position at the end of each reporting period.

We disaggregate our revenue from contracts with customers by major lines of business for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors.

The following table disaggregates our revenue by major lines:

	For the Third Quarter Ended,						First Three Quarters Ended,
	September 7, 2019						September 7, 2019
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts cleaning, containerized waste, & related products/services	$	38,458	$	—	$	38,458	$	116,023	$	—	$	116,023
Vacuum Services & Wastewater Treatment	14,507		—		14,507		43,105		—		43,105
Antifreeze Business	5,654		—		5,654		18,451		—		18,451
Field Services	4,284		—		4,284		12,086		—		12,086
Environmental Services - Other	468		—		468		1,228		—		1,228
Re-refinery Product Sales	—		29,059		29,059		—		80,385		80,385
Oil Collection Services & RFO	—		5,772		5,772		—		16,076		16,076
Oil Filter Business	—		970		970		—		3,292		3,292
Revenues from Contracts with Customers	63,371		35,801		99,172		190,893		99,753		290,646
Other Revenue	5,620		48		5,668		14,791		176		14,967
Total Revenues	$	68,991	$	35,849	$	104,840	$	205,684	$	99,929	$	305,613

14

The following table provides information about contract assets and contract liabilities from contracts with customers:

(thousands)	September 7, 2019		December 29, 2018
Contract assets	$	108	$	100
Contract liabilities	2,440		266
Contract liabilities - net	$	2,332	$	166

During the quarter ended September 7, 2019, the Company recognized no revenue that was included in the contract liabilities balance as of December 29, 2018. During the first three quarters ended September 7, 2019, the Company recognized $0.3 million of revenue that was included in the contract liabilities balance as of December 29, 2018. As a result of having adopted ASC 842 on December 30, 2018, the Company recognized within Contract liabilities - net approximately $2.2 million of deferred rental income. The Company has no assets recognized from costs to obtain or fulfill a contract with a customer. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.

(5)    ACCOUNTS RECEIVABLE

Accounts receivable for the third quarter ended September 7, 2019, and the fiscal year ended December 29, 2018 consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Trade	$	53,992	$	51,118
Less: allowance for doubtful accounts	1,875		1,816
Trade - net	52,117		49,302
Related parties	1,805		1,595
Other	1,731		847
Total accounts receivable - net	$	55,653	$	51,744

The following table provides the changes in the Company’s allowance for doubtful accounts for the three quarters ended September 7, 2019, and the fiscal year ended December 29, 2018:

(thousands)	September 7, 2019			December 29, 2018
Balance at beginning of period	$	1,816		$	1,881
Provision for bad debts	829			628
Accounts written off, net of recoveries	(770		)	(693		)
Balance at end of period	$	1,875		$	1,816

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(6)    INVENTORY

The carrying value of inventory consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Solvents and solutions	$	8,340	$	8,216
Used oil and processed oil	7,782		12,124
Machines	5,517		5,334
Drums and supplies	4,512		5,231
Other	2,510		2,378
Total inventory	28,661		33,283
Less: machine refurbishing reserve	402		224
Total inventory - net	$	28,259	$	33,059

Inventory consists primarily of used oil, processed oil, solvents and solutions, new and refurbished parts cleaning machines, drums and supplies, and other items. Inventories are valued at the lower of first-in, first-out (FIFO) cost or net realizable value, net of any reserves for excess, obsolete, or unsalable inventory. The Company routinely 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 Company had no inventory write downs during the first three quarters of fiscal 2019 or fiscal 2018.

(7) PROPERTY, PLANT, AND EQUIPMENT

Property, plant, and equipment consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Machinery, vehicles, and equipment	$	105,575	$	98,708
Buildings and storage tanks	69,876		69,791
Land	9,663		9,546
Leasehold improvements	5,838		5,701
Construction in progress	19,851		15,405
Assets held for sale	4		4
Total property, plant and equipment	210,807		199,155
Less: accumulated depreciation	64,853		59,168
Property, plant and equipment - net	$	145,954	$	139,987
(thousands)	September 7, 2019		December 29, 2018
Equipment at customers	$	76,469	$	73,075
Less: accumulated depreciation	52,310		49,261
Equipment at customers - net	$	24,159	$	23,814

Depreciation expense for the third quarters ended September 7, 2019 and September 8, 2018 was $3.3 million and $3.1 million, respectively. Depreciation expense for the first three quarters ended September 7, 2019 and September 8, 2018 was $9.7 million and $8.9 million, respectively.

16

(8) GOODWILL AND OTHER INTANGIBLE ASSETS

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 an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company's determination of fair value requires certain assumptions and estimates, such as margin expectations, market conditions, growth expectations, expected changes in working capital, etc., regarding expected future profitability and expected future cash flows. The Company tests goodwill for impairment at each of its two reporting units, Environmental Services and Oil Business.

The following table shows changes to our goodwill balances by segment from December 29, 2018 to September 7, 2019:

(thousands)	Oil Business			Environmental Services			Total
Goodwill at December 29, 2018
Gross carrying amount	$	3,952		$	34,123		$	38,075
Accumulated impairment loss	(3,952		)	—			(3,952		)
Net book value at December 29, 2018	$	—		$	34,123		$	34,123
Acquisitions	—			384			—
Measurement period adjustments	—			(1,763		)	—
Goodwill at September 7, 2019
Gross carrying amount	3,952			32,744			36,696
Accumulated impairment loss	(3,952		)	—			(3,952		)
Net book value at September 7, 2019	$	—		$	32,744		$	32,744

The following is a summary of software and other intangible assets:

	September 7, 2019						December 29, 2018
(thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer & supplier relationships	$	25,285	$	13,108	$	12,177	$	23,686	$	11,445	$	12,241
Software	6,641		4,605		2,036		5,040		4,094		946
Non-compete agreements	3,422		3,032		390		2,937		2,904		33
Patents, formulae, and licenses	1,769		753		1,016		1,769		708		1,061
Other	1,701		1,171		530		1,442		1,042		400
Total software and intangible assets - net	$	38,818	$	22,669	$	16,149	$	34,874	$	20,193	$	14,681

Amortization expense was $0.7 million for both third quarters ended September 7, 2019, and September 8, 2018. Amortization expense was $2.5 million for the first three quarters ended September 7, 2019, and $2.2 million for the first three quarters ended September 8, 2018.

The weighted average useful lives of software and other intangibles are as follows:

17

	Weighted average useful life (years)
Patents, formulae, & licenses	15
Customer and supplier relationships	11
Software	10
Non-compete agreements	5
Other intangibles	7

The estimated amortization expense for the remainder of fiscal 2019 and each of the five succeeding fiscal years is as follows:

(millions)
Fiscal Year	Amortization Expense
2019	$1.0
2020	3.1
2021	2.9
2022	2.7
2023	2.1
2024	0.6

The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, the finalization of the fair value of intangible assets that have been acquired from business combinations, disposal of intangible assets, accelerated amortization of intangible assets, and other events.

(9) ACCOUNTS PAYABLE

Accounts payable consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Accounts payable	$	34,663	$	32,471
Accounts payable - related parties	426		159
Total accounts payable	$	35,089	$	32,630

(10) DEBT AND FINANCING ARRANGEMENTS

Bank Credit Facility

The Company's Credit Agreement as amended ("Credit Agreement"), provides for borrowings of up to $95.0 million, subject to the satisfaction of certain terms and conditions, comprised of a term loan of $30.0 million and up to $65.0 million of borrowings under the revolving loan portion. The actual amount of borrowings 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 London Interbank Offering Rate (“LIBOR”) plus 1%, or (c) Bank of America'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 (i) the 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.

18

The Credit Agreement contains customary terms and provisions (including representations, covenants, and conditions) for transactions of this type. Certain covenants, among other things, restrict the Company's and its subsidiaries' ability to incur indebtedness, grant liens, make investments and sell assets. The Credit Agreement also contains customary events of default, covenants and representations and warranties. Financial covenants include:

• An interest coverage ratio (based on interest expense and EBITDA) of at least 3.5 to 1.0;

• A total leverage ratio no greater than 3.00 to 1.00, provided that in the event of a permitted acquisition having an aggregate consideration equal to $10.0 million or more, at the Borrower’s election, the total leverage ratio shall be deemed to be 3.25 to 1.00 for the fiscal quarter in which such permitted acquisition occurs and the three immediately following fiscal quarters and thereafter will revert to 3.00 to 1.00; and

• A capital expenditures covenant limiting capital expenditures to $100.0 million plus, if the capital expenditures permitted have been fully utilized, an additional amount for the remaining term of the Credit Agreement equal to 35% of EBITDA for the thirteen “four-week” periods most recently ended immediately prior to the full utilization of such $100.0 million basket.

The Credit Agreement places certain limitations on acquisitions and the payment of dividends.

Debt at September 7, 2019 and December 29, 2018 consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Principal amount	$	30,000	$	30,000
Less: unamortized debt issuance costs	745		954
Debt less unamortized debt issuance costs	$	29,255	$	29,046

For the third quarter ended September 7, 2019, the Company recorded interest expense of $0.4 million, of which $0.3 million is with respect to our term loan, and $0.1 million relates to amortization of debt issuance costs. The Company recorded interest expense of $0.4 million for the third quarter ended September 8, 2018 which related primarily to our term loan. During the first three quarters of fiscal 2019, the Company recorded interest expense of $1.2 million which related primarily to our term loan. In the first three quarters of fiscal 2018 the Company recorded interest expense of $1.0 million.

The Company's weighted average interest rate for all debt as of September 7, 2019, and September 8, 2018 was 4.3% and 3.8%, respectively.

As of September 7, 2019 and December 29, 2018, the Company was in compliance with all covenants under its Credit Agreement. As of September 7, 2019 and December 29, 2018, the Company had $1.1 million and $1.3 million of standby letters of credit issued, respectively, and $62.5 million and $63.7 million was available for borrowing under the bank credit facility, respectively. We believe that the carrying value of our debt balance at September 7, 2019 approximates fair value.

Scheduled Maturities of Debt

(thousands)
Fiscal Year:	Term Loan
2019	$	—
2020	—
2021	—
2022	30,000
2023	—
Aggregate Maturities	$	30,000

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(11) SEGMENT INFORMATION

The Company has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists primarily of the Company's parts cleaning, containerized waste management, vacuum truck service, antifreeze recycling activities, and field services. The Oil Business segment consists primarily of the Company's used oil collection, used oil re-refining activities, and the dehydration of used oil to be sold as recycled fuel oil.

No single customer in either segment accounted for more than 10.0% of consolidated revenues in any of the periods presented. There were no intersegment revenues. Both the Environmental Services and Oil Business segment operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

Segment results for the third quarters ended September 7, 2019, and September 8, 2018 were as follows:

Third Quarter Ended,
September 7, 2019
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	54,066	$	3,142	$	—	$	57,208
	Product revenues	9,305		32,659		—		41,964
	Rental income	5,620		48		—		5,668
Total revenues		$	68,991	$	35,849	$	—	$	104,840
Operating expenses
	Operating costs	49,486		30,630		—		80,116
	Operating depreciation and amortization	1,743		1,441		—		3,184
Profit before corporate selling, general, and administrative expenses		$	17,762	$	3,778	$	—	$	21,540
Selling, general, and administrative expenses						11,241		11,241
Depreciation and amortization from SG&A						796		796
Total selling, general, and administrative expenses						$	12,037	$	12,037
Other expense - net						1,020		1,020
Operating income								8,483
Interest expense – net						181		181
Income before income taxes								$	8,302

20

Third Quarter Ended,
September 8, 2018
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	55,473	$	2,581	$	—	$	58,054
	Product revenues	7,834		33,786		—		41,620
Total revenues		$	63,307	$	36,367	$	—	$	99,674
Operating expenses
	Operating costs	45,460		30,585		—		76,045
	Operating depreciation and amortization	1,599		1,410		—		3,009
Profit before corporate selling, general, and administrative expenses		$	16,248	$	4,372	$	—	$	20,620
Selling, general, and administrative expenses						10,641		10,641
Depreciation and amortization from SG&A						767		767
Total selling, general, and administrative expenses						$	11,408	$	11,408
Other expense - net						253		253
Operating income								8,959
Interest expense – net						256		256
Income before income taxes								$	8,703

Segment results for the first three quarters ended September 7, 2019, and September 8, 2018 were as follows:

First Three Quarters Ended,
September 7, 2019
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	161,273	$	10,249	$	—	$	171,522
	Product revenues	29,620		89,504		—		119,124
	Rental income	14,791		176		—		14,967
Total revenues		$	205,684	$	99,929	$	—	$	305,613
Operating expenses
	Operating costs	149,024		92,425		—		241,449
	Operating depreciation and amortization	5,252		4,308		—		9,560
Profit before corporate selling, general, and administrative expenses		$	51,408	$	3,196	$	—	$	54,604
Selling, general, and administrative expenses						34,679		34,679
Depreciation and amortization from SG&A						2,616		2,616
Total selling, general, and administrative expenses						$	37,295	$	37,295
Other expense - net						2,477		2,477
Operating income								14,832
Interest expense – net						629		629
Income before income taxes								$	14,203

21

First Three Quarters Ended,
September 8, 2018
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	163,428	$	8,777	$	—	$	172,205
	Product revenues	21,798		89,120		—		110,918
Total revenues		$	185,226	$	97,897	$	—	$	283,123
Operating expenses
	Operating costs	134,640		86,062		—		220,702
	Operating depreciation and amortization	4,590		4,188		—		8,778
Profit before corporate selling, general, and administrative expenses		$	45,996	$	7,647	$	—	$	53,643
Selling, general, and administrative expenses						33,185		33,185
Depreciation and amortization from SG&A						2,300		2,300
Total selling, general, and administrative expenses						$	35,485	$	35,485
Other expense - net						983		983
Operating income								17,175
Interest expense – net						742		742
Income before income taxes								$	16,433

Total assets by segment as of September 7, 2019, and December 29, 2018 were as follows:

(thousands)		September 7, 2019		December 29, 2018
Total Assets:
	Environmental Services	$	214,147	$	148,192
	Oil Business	159,552		142,691
	Unallocated Corporate Assets	74,854		56,939
	Total	$	448,553	$	347,822

Segment assets for the Environmental Services and Oil Business segments consist of property, plant, and equipment, right-of-use assets, intangible assets, accounts receivable, goodwill, and inventories. 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.

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(12)    COMMITMENTS AND CONTINGENCIES

LEASES

Lessee

The Company leases buildings and property, railcars, machinery and equipment, and various types of vehicles for use in our operations. Each arrangement is evaluated individually to determine if the arrangement is or contains a lease at inception. The Company has lease agreements with lease and non-lease components and we have elected to not separate lease and non-lease components for all classes of underlying assets. In addition, our lease agreements do not contain any material residual guarantees or restrictive covenants.

Leases may include variable lease payments for common area maintenance, real estate taxes, and truck lease mileage. No leases are tied to a market index rate or CPI. Variable lease payments are not included in the initial measurement of the right-of-use assets or lease liabilities, and are recorded as lease expense in the period incurred. Options to extend or terminate a lease are included in the lease term when it is reasonably certain that we will exercise that option. We have elected not to record leases with an initial term of 12 months or less on the balance sheet and instead recognize those lease payments on a straight-line basis over the lease term. Leases with initial terms in excess of 12 months are recorded as either operating or financing leases in our Consolidated Balance Sheet.

Right-of-use assets represent the Company's right to use an underlying asset during the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Our lease right-of-use assets are measured at the initial measurement of the lease liability, adjusted for any lease payments made prior to the lease commencement date, less any lease incentives received and other initial direct costs incurred. Our lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use an incremental borrowing rate based on the information available at commencement date, including lease term, in determining the present value of future payments.

Our leases have remaining terms ranging from less than one month to 11 years and may include options to extend or terminate the lease when it is reasonably certain that the option will be exercised. Lease expense is recognized on a straight-line basis over the lease term. Our finance leases include a fleet of mobile equipment.

23

The components of lease expense were as follows:

(thousands)	For the Third Quarter Ended, September 7, 2019		First Three Quarters Ended, September 7, 2019
Finance lease cost:
Amortization of right-of-use Assets	$	25	$	25
Interest on lease liabilities	6		6
Total finance lease cost	$	31	$	31
Operating lease cost	$	5,914	$	18,366
Short-term lease cost	1,579		3,650
Variable lease cost	827		2,794
Total lease cost	$	8,320	$	24,810
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	$	4	$	4
Operating cash flows from operating leases	$	6,554	$	19,805
Financing cash flows from financing leases	$	13	$	13
Right-of-use assets obtained in exchange for new finance lease liabilities	$	1,487	$	1,487
Right-of-use assets obtained in exchange for new operating lease liabilities	$	12,099	$	92,226
Weighted-average remaining lease term (years)
Finance leases			6.90
Operating leases			4.80
Weighted-average discount rate
Finance leases			3.4		%
Operating leases			5.7		%

Future annual minimum lease payment commitments as of September 7, 2019 were as follows:

(thousands)
2019	$	7,770
2020	22,835
2021	18,681
2022	14,685
2023	10,840
2024 and thereafter	16,440
Total minimum lease payments	$	91,251
Less: imputed interest	11,703
Lease liability	$	79,548

As disclosed in our 2018 Annual Report on Form 10-K, and under the previous lease accounting standard 840, future minimum lease payments due under noncancelable operating lease agreements as of December 29, 2018 were as follows:

24

(thousands)
2019	$	22,226
2020	16,095
2021	12,458
2022	9,247
2023	6,020
2024 and thereafter	5,786
Total minimum lease payments	$	71,832

Lessor

The Company is a lessor of portions of a building and property, railcars, and equipment such as embedded leases of parts cleaning machines. Each of the Company’s leases is classified as an operating lease, and the vast majority are short-term leases. Variable lease payments include real and personal property taxes, which are based on the lessee’s pro rata portion of such amounts, and excess mileage charges which are computed as the actual miles traveled in a calendar year minus the maximum average mileage allowance as specified per the contract. Options to extend the lease beyond the original terms range from day-to-day renewals to increments of five-year extensions. Options to terminate the lease range from immediate termination upon return of the asset to various written notification periods following a minimum lease term. Options for a lessee to purchase the underlying asset are not contractually specified but may be negotiated on a case-by-case basis. Significant judgments made in determining whether a contract contains a lease include assessments as to whether or not the contract conveys the right to direct the use of an identified asset. Significant judgments made in allocating consideration between lease and non-lease components include techniques applied in estimating the relative stand-alone selling prices of the lease and non-lease components of the contract in cases where a stand-alone selling price is not directly observable. As of September 7, 2019, the Company is party to a contract under which it leases railcars to the related party Calumet Specialty Products Partners, L.P. No leased assets are covered by residual value guarantees. The Company manages the risk associated with the residual value of leased assets through such means as performing periodic maintenance and upkeep activities and the inclusion of contractual terms that hold the lessee responsible for damage incurred to leased assets. Contained in Note 7, “Property, plant, and equipment,” are disclosures concerning the Company’s underlying assets under operating leases. The Company has made an accounting policy election to exclude from the consideration in the contract and from variable payments not included in the consideration in the contract all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific lease revenue-producing transaction and collected by the lessor from a lessee.

The Company recognizes rental income on a straight-line basis for that portion of the consideration allocated to the embedded lease component of certain of our parts cleaning contracts. We also recognize rental income on certain subleases of railcars and portions of a building and property.

Rental income for the third quarter and first three quarters ended September 7, 2019 was as follows:

	Third Quarter Ended,						First Three Quarters Ended,
	September 7, 2019						September 7, 2019
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	5,620	$	—	$	5,620	$	14,791	$	—	$	14,791
Railcars	—		35		35		—		147		147
Property	—		13		13		—		29		29
Total rental income	$	5,620	$	48	$	5,668	$	14,791	$	176	$	14,967

Purchase Obligations

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.

25

The Company has purchase obligations in the form of open purchase orders of $28.0 million as of September 7, 2019, and $18.6 million as of December 29, 2018, 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. The Company may also be subject to tax audits in a variety of jurisdictions. 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 September 7, 2019 and December 29, 2018, the Company had accrued $4.4 million and $4.2 million related to loss contingencies and other contingent liabilities, respectively.

(13)    INCOME TAXES

 The Company deducted for federal income tax purposes accelerated "bonus" depreciation on the majority of its capital expenditures for assets placed in service in fiscal 2011 through the third quarter of 2019. Therefore, the Company recorded a noncurrent deferred tax liability as to the difference between the book basis and the tax basis of those assets. As of the third quarter of fiscal 2019, the Company's remaining Federal Net Operating Loss ("NOL") was $14.6 million, which will begin to expire in 2031. The unexpired balance on the federal NOL generated in 2011 is $0.5 million as of September 7, 2019. The Company's remaining balance of Federal NOLs recorded during 2012 - 2015 was $14.1 million as of September 7, 2019. There are also state NOLs of varying amounts, dependent on each state’s conformity with bonus depreciation. The remaining deferred tax asset related to the Company's state and federal NOL was a tax effected balance of $3.4 million.

The Company's effective tax rate for the third quarter of fiscal 2019 was 27.1% compared to 26.2% in the third quarter of fiscal 2018. The Company’s effective rate for the first three quarters of fiscal 2019 was 24.0% compared to 24.3% in the first three quarters of fiscal 2018.

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 $2.5 million for uncertain tax positions as of September 7, 2019. The gross unrecognized tax benefits would, if recognized, decrease the Company's effective tax rate.

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(14)    SHARE-BASED COMPENSATION

On February 20, 2019, the Compensation Committee and the Board of Directors of the Company adopted the 2019 Incentive Award Plan (the “2019 Plan”), to replace the Company’s 2008 Omnibus Incentive Plan (“2008 Plan”), which expired in March 2018. The 2019 Plan was approved during the second quarter of 2019 and authorizes 1,500,000 shares to be available for award grants.

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 common 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. In addition, the Company may grant restricted shares to certain members of management based on their services and contingent upon continued service with the Company. The restricted shares vest over a period of approximately three years from the grant date. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant.

The following table shows a summary of restricted share grants and expense resulting from the awards:

			Compensation Expense
(thousands, except share amounts)			First Three Quarters Ended,				Unrecognized Expense as of,
Recipient of Grant	Grant Date	Restricted Shares	September 7, 2019		September 8, 2018		September 7, 2019		December 29, 2018
Members of Management	February, 2017	146,564	$	249	$	318	$	118	$	385
Chief Executive Officer	February, 2017	500,000	569		921		661		1,230
Members of Management	February, 2018	116,958	373		374		804		1,176
Special Incentive Grant	April, 2018	350,000	661		817		3,887		6,633
Board of Directors	May, 2018	13,800	—		197		—		—
Board of Directors	May, 2019	10,590	197		—		88		—
Members of Management	May, 2019	23,560	136		—		500		—

In February 2017, as part of Mr. Recatto's employment agreement, the Company granted a restricted stock award of 500,000 shares of common stock, which vests through January 2021 in an amount based on the vesting table below, with the common stock price increase to be determined based on the increase in the price of the Company’s common stock (if any) from the closing price of the common stock as reported by Nasdaq on the employment commencement date ($15.00) and the common stock price on the potential vesting date (determined by using the weighted average closing price of a share of the Company's common stock for the 90-day period ending on the vesting date). If the stock price does not increase by $5.00, then no shares shall vest. During the first three quarters of fiscal 2019, the Company recorded approximately $0.6 million of compensation expense related to this award. In the future, the Company expects to recognize compensation expense of approximately $0.7 million over the remaining requisite service period, which ends January 31, 2021. The fair value of this restricted stock award as of the grant date was estimated using a Monte Carlo simulation model. Key assumptions used in the Monte Carlo simulation to estimate the grant date fair value of this award are a risk-free rate of 1.70%, expected dividend yield of zero, and an expected volatility assumption of 41.73%.

Vesting Table
Increase in Stock Price From the Employment Commencement Date to the Vesting Date	Total Percentage of Restricted Stock Shares to Be Vested
Less than $5 per share increase	—%
$5 per share increase	25%
$10 per share increase	50%
$15 per share increase	75%
$20 or more per share increase	100%

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Provision for possible accelerated vesting of award

If the average closing price of the Company's common stock increases by the marginal levels set forth in the above vesting table for any consecutive 180 day period between the award date and final vesting date, Mr. Recatto shall become vested in 50% of the corresponding total percentage of restricted shares earned on the last day of the 180 day period.

Vestings

On June 10, 2019, the average closing price of the Company's common stock met the 50% marginal level and Mr. Recatto became fully vested in half of the 125,000 vested shares. On March 14, 2018, the average closing price of the Company's common stock met the 25% marginal level and Mr. Recatto became fully vested in half of the 125,000 vested shares.

The following table summarizes the restricted stock activity for the first three quarters ended September 7, 2019:

Restricted Stock (Nonvested Shares)	Number of Shares		Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at December 29, 2018	1,013,863		$	18.20
Granted	34,150		26.54
Vested	(158,372	)	16.52
Forfeited	(105,062	)	22.01
Nonvested shares outstanding at September 7, 2019	784,579		$	18.39

Employee Stock Purchase Plan

As of September 7, 2019, the Company had reserved 115,022 shares of common stock available for purchase under the Employee Stock Purchase Plan. In the first three quarters of fiscal 2019, employees purchased 14,240 shares of the Company’s common stock with a weighted average fair market value of $25.72 per share.

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(15)  EARNINGS PER SHARE

The following table reconciles the number of shares outstanding for the third quarters and first three quarters of fiscal 2019 and 2018, 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:

	Third Quarter Ended,				First Three Quarters Ended,
(thousands, except per share amounts)	September 7, 2019		September 8, 2018		September 7, 2019		September 8, 2018
Net income	$	6,056	$	6,419	$	10,792	$	12,437
Less: income attributable to noncontrolling interest	86		74		278		213
Net income attributable to Heritage-Crystal Clean, Inc. available to common stockholders	$	5,970	$	6,345	$	10,514	$	12,224
Weighted average basic shares outstanding	23,185		23,048		23,146		23,013
Dilutive shares for share–based compensation plans	236		356		238		286
Weighted average diluted shares outstanding	23,421		23,404		23,384		23,299
Net income per share: basic	$	0.26	$	0.28	$	0.45	$	0.53
Net income per share: diluted	$	0.25	$	0.27	$	0.45	$	0.52

(16)  OTHER EXPENSE - NET

Other expense - net was $2.5 million of expense for the first three quarters of fiscal 2019 primarily relating to $1.5 million of site closure costs for a facility in Wilmington, DE. Other expense of $1.0 million for the first three quarters of fiscal 2018 primarily consists of $0.7 million of site closure costs.

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(17) SUBSEQUENT EVENTS

On October 8, 2019, Heritage-Crystal Clean completed the acquisition of certain assets of California Environmental & Litho, Inc., which provided transportation and disposal services for hazardous and non-hazardous waste to printing, photographic, automotive and body shop businesses in the Bay Area, Central Valley & Northern California. The acquisition represents an expansion of HCC’s Environmental Services business in this geographic area while potentially providing new services and products for this market. No facilities were acquired in the transaction and all service employees and activity will be consolidated in existing branch territories. Total consideration for the acquisition was approximately $0.6 million.

ITEM 2.  MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Disclosure Regarding Forward-Looking Statements

You should read the following discussion in conjunction with our consolidated financial statements and related notes in our Annual Report on Form 10-K filed with the SEC on March 6, 2019. In addition to historical information, this discussion contains forward-looking statements that involve risks, uncertainties and assumptions that could cause actual results to differ materially from our expectations. These statements can be identified by the fact that they do not relate strictly to historical or current facts. They use words such as "aim," "anticipate," "believe," "could," "estimate," "expect," "intend," "may," "plan," "project," "should," "will be," "will continue," "will likely result," "would" and other words and terms of similar meaning in conjunction with a discussion of future or estimated operating or financial performance. You should read statements that contain these words carefully, because they discuss our future expectations, contain projections of our future results of operations or of our financial position or state other “forward-looking” information. Forward-looking statements speak only as of the date of this quarterly report. Factors that could cause such differences include those described in the section titled “Risk Factors” and elsewhere in our Annual Report on Form 10-K for fiscal 2018 filed with the SEC on March 6, 2019. Except as required under federal securities laws and the rules and regulations of the SEC, we do not have any intention, and do not undertake, to update any forward-looking statements to reflect events or circumstances arising after the date of this quarterly report, whether as a result of new information, future events or otherwise. As a result of these risks and uncertainties, readers are cautioned not to place undue reliance on the forward-looking statements included in this quarterly report or that may be made elsewhere from time to time by, or on behalf of, us. All forward-looking statements attributable to us are expressly qualified by these cautionary statements. Certain tabular information may not foot due to rounding. Our fiscal year ends on the Saturday closest to December 31. Interim results are presented for the twelve weeks ("third quarter" or "quarter") and thirty-six weeks (first three quarters) ended September 7, 2019 and September 8, 2018, respectively. "Fiscal 2018" represents the 52-week period ended December 29, 2018 and "Fiscal 2019" represents the 52-week period ending December 28, 2019.

Overview

We provide parts cleaning, containerized waste management, used oil collection, vacuum truck services, antifreeze recycling, and field services primarily to small and medium sized industrial customers as well as vehicle maintenance customers. We own and operate a used oil re-refinery, several wastewater treatment plants and multiple antifreeze recycling facilities. We believe we are the second largest provider of industrial and hazardous waste services to small and mid-sized customers in both the vehicle maintenance and industrial services sector in North America, and we have the second largest used oil re-refining capacity in North America. Our services help our customers manage their used chemicals and liquid and solid wastes while also helping to minimize their regulatory burdens. We operate from a network of 91 branch facilities providing services to customers in 45 states and parts of Canada. We conduct business through two segments: Environmental Services and Oil Business.

Our Environmental Services segment revenues are generated primarily from providing parts cleaning services, containerized waste management, vacuum truck services, antifreeze recycling, and field services. Revenues from this segment accounted for approximately 67% of our total Company revenues for the first three quarters of fiscal 2019. In the Environmental Services segment, we define and measure same-branch revenues for a given period as the subset of all our branches that have been open and operating throughout and between the periods being compared, and we refer to these as established branches. We calculate average revenues per working day by dividing our revenues by the number of non-holiday weekdays in the applicable fiscal year or fiscal quarter.

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Our Oil Business segment consists primarily of our used oil collection, used oil re-refining activities, and recycled fuel oil ("RFO") sales which together accounted for approximately 33% of our total Company revenues in the first three quarters of fiscal 2019.

Our operating costs include the costs of the materials we use in our products and services, such as used oil collected from customers or purchased from third party collectors, solvent, and other chemicals. The used solvent that we retrieve from customers in our product reuse program is accounted for as a reduction in our net cost of solvent under operating costs, whether placed in inventory or sold to a purchaser for reuse. Changes in the price of crude oil can impact operating costs indirectly as it may impact the price we pay for solvent or used oil, although we attempt to offset volatility in the oil markets by managing the spread between the costs we pay for our materials and the prices we charge for our products and services. Operating costs also include transportation of solvents and waste, payments to third parties to recycle or dispose of the waste materials that we collect, and the costs of operating our re-refinery, recycling centers, waste water treatment facilities, hubs, and branch system including personnel costs (including commissions), facility rent, truck leases, fuel, and maintenance. Our operating costs as a percentage of sales generally increase in relation to the number of new branch openings. As new branches achieve route density and scale efficiencies, our operating costs as a percentage of sales generally decrease.

We use profit before corporate selling, general, and administrative expenses ("SG&A") as a key measure of segment profitability. We define profit before corporate SG&A expense as revenue less operating costs and depreciation and amortization from operations.

Our corporate selling, general, and administrative expenses include the costs of performing centralized business functions, including sales management at or above the regional level, business management and marketing, billing, receivables management, accounting and finance, procurement, real estate management, information technology, environmental health and safety, human resources and legal.

We operate a used oil re-refinery located in Indianapolis, Indiana, through which we recycle used oil into high quality lubricant base oil and other products. We supply the base oil to firms that produce and market finished lubricants. Our re-refinery has an annual nameplate capacity of approximately 75 million gallons of used oil feedstock, allowing it to produce approximately 47 million gallons of lubricating base oil per year when operating at full capacity.

Critical Accounting Policies

Critical accounting policies are those that are both important to the accurate portrayal of a company’s financial condition and results and require subjective or complex judgments, often as a result of the need to make estimates about the effect of matters that are inherently uncertain.

In order to prepare financial statements that conform to accounting principles generally accepted in the United States, commonly referred to as GAAP, we make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes. Certain estimates are particularly sensitive due to their significance to the financial statements and the possibility that future events may be significantly different from our expectations.

There were no material changes during the first three quarters of fiscal 2019 to the information provided under the heading "Critical Accounting Policies" included in our Annual Report on Form 10-K for the fiscal year ended December 29, 2018 with the exception of the adoption of the new lease standard, ASC 842. See footnote 12 — Commitments and Contingencies for more information.

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RESULTS OF OPERATIONS

General

The following table sets forth certain operating data as a percentage of revenues for the periods indicated:

	For the Third Quarter Ended,								First Three Quarters Ended,
(thousands)	September 7, 2019				September 8, 2018				September 7, 2019				September 8, 2018
Revenues
Service revenues	$	57,208	54.6	%	$	58,054	58.2	%	$	171,522	56.1	%	$	172,205	60.8	%
Product revenues	41,964		40.0	%	41,620		41.8	%	119,124		39.0	%	110,918		39.2	%
Rental income	5,668		5.4	%	—		—	%	14,967		4.9	%	—		—	%
Total revenues	$	104,840	100.0	%	$	99,674	100.0	%	$	305,613	100.0	%	$	283,123	100.0	%
Operating expenses
Operating costs	$	80,116	76.4	%	$	76,045	76.3	%	$	241,449	79.0	%	$	220,702	78.0	%
Selling, general, and administrative expenses	11,241		10.7	%	10,641		10.7	%	34,679		11.3	%	33,185		11.7	%
Depreciation and amortization	3,980		3.8	%	3,776		3.8	%	12,176		4.0	%	11,078		3.9	%
Other expense - net	1,020		1.0	%	253		0.3	%	2,477		0.8	%	983		0.3	%
Operating income	8,483		8.1	%	8,959		9.0	%	14,832		4.9	%	17,175		6.1	%
Interest expense – net	181		0.2	%	256		0.3	%	629		0.2	%	742		0.3	%
Income before income taxes	8,302		7.9	%	8,703		8.7	%	14,203		4.6	%	16,433		5.8	%
Provision for income taxes	2,246		2.1	%	2,284		2.3	%	3,411		1.1	%	3,996		1.4	%
Net income	6,056		5.8	%	6,419		6.4	%	10,792		3.5	%	12,437		4.4	%
Income attributable to noncontrolling interest	86		0.1	%	74		0.1	%	278		0.1	%	213		0.1	%
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$	5,970	5.7	%	$	6,345	6.4	%	$	10,514	3.4	%	$	12,224	4.3	%

Revenues

Revenue for the third quarter of 2019 was $104.8 million compared to $99.7 million for the same quarter of 2018, an increase of $5.2 million, or 5.2%. The $5.2 million increase in revenue was driven by 9.0% revenue growth in the Environmental Services segment, partially offset by a 1.4% decline in revenue from our Oil Business segment. For the first three quarters of fiscal 2019, revenues increased $22.5 million, or 7.9%, from $283.1 million in the first three quarters of fiscal 2018 to $305.6 million in the first three quarters of 2019. The increase in revenue was driven mainly by growth in most of our Environmental Services segment product and service lines.

Operating costs

Operating costs increased $4.1 million, or 5.4%, during the third quarter of 2019 compared to the third quarter of fiscal 2018. The increase was mainly due to higher labor cost and employee benefit cost compared to the year-ago quarter. Operating costs increased $20.8 million, or 9.4%, in the first three quarters of fiscal 2019 compared to the first three quarters of fiscal 2018. The increase in operation costs was mainly driven by lower spreads in our Oil Business segment, along with higher labor cost and employee benefit cost in our Environmental Services segment.

We expect that in the future our operating costs in the Environmental Services business will continue to increase as ourservice volume increases; however, a decrease in crude oil prices could partially offset this cost increase because a decrease in price could cause a decline in the price we pay for parts cleaning solvent and diesel fuel. Likewise, an increase in crude oil prices could cause an increase in the price we pay for parts cleaning solvent and diesel fuel. In the Oil Business segment, our operating costs could increase or decrease in the future depending on changes in the price for crude oil which could indirectly impact our used oil collection costs and processing costs at our re-refinery.

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Selling, general, and administrative expenses

Selling, general, and administrative expenses increased $0.6 million, or 5.6%, from the third quarter of fiscal 2018 to the third quarter of fiscal 2019 mainly driven by higher bad debt expense, salaries, and employee benefits, partially offset by lower legal fees. Selling, general, and administrative expenses increased $1.5 million, or 4.5%, from the first three quarters of fiscal 2018 to the first three quarters of fiscal 2019. The increase in expense was mainly driven by higher bad debt expense and incentive compensation, partially offset by lower legal fees year-over-year.

Other expense - net

Other expense - net was $1.0 million of expense for the third quarter of fiscal 2019 primarily relating to asset write-offs and other site closure costs associated with a facility in Wilmington, DE. Other expense was $0.3 million for the third quarter of 2018. Other expense - net was $2.5 million of expense for the first three quarters of fiscal 2019 primarily relating to site closure costs and asset write-offs associated with a facility in Wilmington, DE. Other expense of $1.0 million for the first three quarters of fiscal 2018 primarily consists of $0.7 million of site closure costs.

Interest expense - net

Interest expense - net for the third quarter of fiscal 2019 and fiscal 2018 was $0.2 million, and $0.3 million, respectively. For the first three quarters of 2019 and 2018, interest expense was $0.6 million and $0.7 million, respectively.

Provision for income taxes

The Company's effective tax rate for the third quarter of fiscal 2019 was 27.1% compared to 26.2% in the third quarter of fiscal 2018. The Company’s effective rate for the first three quarters of fiscal 2019 was 24.0% compared to 24.3% in the first three quarters of fiscal 2018.

Segment Information

The following table presents revenues by reportable segment:

			For the Third Quarter Ended,				Change
(thousands)			September 7, 2019		September 8, 2018		$			%
Revenues:
	Environmental Services		$	68,991	$	63,307	$	5,684		9.0	%
	Oil Business		35,849		36,367		(518		)	(1.4	)%
		Total	$	104,840	$	99,674	$	5,166		5.2	%

			First Three Quarters Ended,				Change
			September 7, 2019		September 8, 2018		$		%
Revenues:
	Environmental Services		$	205,684	$	185,226	$	20,458	11.0	%
	Oil Business		99,929		97,897		2,032		2.1	%
		Total	$	305,613	$	283,123	$	22,490	7.9	%

In the third quarter of fiscal 2019, Environmental Services revenue increased by $5.7 million, or 9.0%, from $63.3 million in the third quarter of fiscal 2018 to $69.0 million in the third quarter of fiscal 2019. The 9.0% increase in revenue was driven by growth in most of our product and service lines with the antifreeze, vacuum, and containerized waste businesses being the primary contributors to the growth. Excluding the impact of a large field services project from our third quarter 2018 results, our organic revenue growth in the segment during the third quarter 2019 was 10.5%. Environmental Services revenue increased

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$20.5 million, or 11.0%, compared to the first three quarters of 2018 to $205.7 million during the first three quarters of 2019 driven by growth in most of our product and services lines of business.

During the third quarter of fiscal 2019, Oil Business revenues were down $0.5 million, or 1.4%, to $35.8 million compared to $36.4 million in the third quarter of fiscal 2018. The decline in revenue was mainly due to a decrease in our selling price of base oil, partially offset by an increase in the volume of base oil gallons sold. During the third quarter of fiscal 2019, we produced 11.7 million gallons of base oil at a 108.3% rate of nameplate capacity compared to 11.2 million gallons at a 103.6% rate of nameplate capacity during the third quarter of fiscal of 2018. On a year-over-year basis, Oil Business revenue increased $2.0 million, or 2.1%, due to higher base oil volume sold, partially offset by lower selling prices.

Segment Profit Before Corporate Selling, General and Administrative Expenses ("SG&A")

The following table presents profit by reportable segment before corporate SG&A expense:

		For the Third Quarter Ended,				Change
(thousands)		September 7, 2019		September 8, 2018		$			%
Profit before corporate SG&A*
	Environmental Services	$	17,762	$	16,248	$	1,514		9.3%
	Oil Business	3,778		4,372		(594		)	(13.6)%
	Total	$	21,540	$	20,620	$	920		4.5%

		First Three Quarters Ended,				Change
(thousands)
		September 7, 2019		September 8, 2018		$			%
Profit before corporate SG&A*
	Environmental Services	$	51,408	$	45,996	$	5,412		11.8%
	Oil Business	3,196		7,647		(4,451		)	(58.2)%
	Total	$	54,604	$	53,643	$	961		1.8%

*Includes depreciation and amortization related to operating activity but not depreciation and amortization related to corporate

selling, general, and administrative activity. For further discussion see Note 11 in our consolidated financial statements included elsewhere in this document.

Environmental Services profit before corporate SG&A expense increased $1.5 million, or 9.3%, in the third quarter of fiscal 2019 compared to the third quarter of fiscal 2018 driven mainly by higher revenues. Environmental Services profit before corporate SG&A expense increased $5.4 million, or 11.8%, in the first three quarters of fiscal 2019 compared to the first three quarters of fiscal 2018. The higher operating margin compared to fiscal 2018 was mainly due to higher revenues, partially offset by higher labor and higher employee benefit costs.

Oil Business profit before corporate SG&A expense decreased $0.6 million in the third quarter of fiscal 2019 compared to the third quarter of fiscal 2018. Oil Business profit before corporate SG&A expense decreased $4.5 million in the first three quarters of fiscal 2019, compared to the first three quarters of fiscal 2018. The lower operating margins compared to fiscal 2018 were mainly due to a decrease in the spread between our selling price for base oil and our feedstock costs.

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FINANCIAL CONDITION

Liquidity and Capital Resources

Cash and Cash Equivalents

As of September 7, 2019 and December 29, 2018, cash and cash equivalents were $59.0 million and $43.6 million, respectively. Our primary sources of liquidity are cash flows from operations and funds available to borrow under our term loan and revolving bank credit facility.

Debt and Financing Arrangements

The Company's Credit Agreement as amended ("Credit Agreement") provides for borrowings of up to $95.0 million, subject to the satisfaction of certain terms and conditions, comprised of a term loan of $30.0 million and up to $65.0 million of borrowings under the revolving loan portion. 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 London Interbank Offering Rate (“LIBOR”) plus 1%, or (c) Bank of America'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 (i) the 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 contains customary terms and provisions (including representations, covenants, and conditions) for transactions of this type. Certain covenants, among other things, restrict the Company's and its subsidiaries' ability to incur indebtedness, grant liens, make investments and sell assets. The Credit Agreement contains customary events of default, covenants and representations and warranties. Financial covenants include:

• An interest coverage ratio (based on interest expense and EBITDA) of at least 3.5 to 1.0;

• A total leverage ratio no greater than 3.00 to 1.00, provided that in the event of a permitted acquisition having an aggregate consideration equal to $10.0 million or more, at the Borrower’s election, the total leverage ratio shall be deemed to be 3.25 to 1.00 for the fiscal quarter in which such permitted acquisition occurs and the three immediately following fiscal quarters and thereafter will revert to 3.00 to 1.00;

• A capital expenditures covenant limiting capital expenditures to $100.0 million plus, if the capital expenditures permitted have been fully utilized, an additional amount for the remaining term of the Agreement equal to 35% of EBITDA for the thirteen “four-week” periods most recently ended immediately prior to the full utilization of such $100.0 million basket.

As of September 7, 2019 and December 29, 2018, the Company was in compliance with all covenants under the Credit Agreement. As of September 7, 2019 and December 29, 2018, the Company had $1.1 million and $1.3 million of standby letters of credit issued, respectively, and $62.5 million and $63.7 million was available for borrowing under the bank credit facility, respectively. The actual amount available under the revolving loan portion of the Credit Agreement is limited by the Company's total leverage ratio.

The Company's weighted average interest rate for all debt as of September 7, 2019 and September 8, 2018 was 4.3% and 3.8%, respectively. As of September 7, 2019, the Company had $30.0 million outstanding under the term loan, and no amount outstanding under the revolving credit facility.

We believe that our existing cash, cash equivalents, available borrowings, and other sources of financings will be sufficient to meet our anticipated cash needs for working capital and capital expenditures for at least the next 12 months. We cannot assure you that this will be the case or that our assumptions regarding revenues and expenses underlying this belief will be accurate. If, in the future, we require more liquidity than is available to us under our credit facility, we may need to raise additional funds through debt or equity offerings. Adequate funds may not be available when needed or may not be available on terms favorable to us. If additional funds are raised by issuing equity securities, dilution to existing stockholders may result. If

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we raise additional funds by obtaining loans from third parties, the terms of those financing arrangements may include negative covenants or other restrictions on our business that could impair our operational flexibility, and would also require us to fund additional interest expense. If funding is insufficient at any time in the future, we may be unable to develop or enhance our products or services, take advantage of business opportunities, or respond to competitive pressures, any of which could have a material adverse effect on our business, financial condition and results of operations.

Summary of Cash Flow Activity

	First Three Quarters Ended,
(thousands)	September 7, 2019			September 8, 2018
Net cash provided by (used in):
Operating activities	$	36,325		$	23,002
Investing activities	(19,494		)	(17,599		)
Financing activities	(1,459		)	(977		)
Net increase in cash and cash equivalents	$	15,372		$	4,426

The most significant items affecting the comparison of our operating activities for the first three quarters of fiscal 2019 and the first three quarters of fiscal 2018 are summarized below:

Net Cash Provided by Operating Activities —

• Earnings — Our decrease in net income during the first three quarters of 2019 negatively impacted our net cash provided by operating activities by $1.6 million compared to the first three quarters of 2018.

• Inventory — In the first three quarters of fiscal 2019, the decrease in inventory favorably affected cash flows from operating activities by $13.0 million compared to the first three quarters fiscal 2018 driven mainly by lower carrying value of inventory.

• Accounts Receivable — The increase in accounts receivable, driven mainly by higher revenue, had an unfavorable impact on cash provided by operating activities of $4.3 million in the first three quarters of fiscal 2019 compared to a $4.8 million unfavorable impact the first three quarters of fiscal 2018.

Net Cash Used in Investing Activities —

• Capital expenditures — We used $16.9 million and $12.9 million for capital expenditures during the first three quarters of fiscal 2019 and fiscal 2018, respectively. During the first three quarters of 2019, we purchased $5.8 million worth of vehicles, and spent $1.6 million on IT related projects in our Environmental Services segment, compared to $2.0 million spent on IT related projects during the first three quarters of fiscal 2018. Additionally, we spent approximately $3.4 million for purchases of parts cleaning machines compared to $3.5 million in the first three quarters of fiscal 2018. In our Oil Business segment, during the first three quarters of fiscal 2019, we spent $3.7 million for capital improvements to the re-refinery, compared to $4.9 million on the re-refinery during the first three quarters of 2018. The remaining $2.4 million of capital expenditures in the first three quarters of fiscal 2019 was for various projects, compared to $2.5 million spent on other various projects in the first three quarters of fiscal 2018.

• Business acquisitions, net of cash acquired — We used $2.6 million of cash outflows for acquisitions during the first three quarters of fiscal 2019. During the first three quarters of 2018, we used $4.8 million of cash outflows for the acquisitions. See footnote 3 — Business Combinations for more information.

36

ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to interest rate risks primarily through borrowings under our bank Credit Facility. Interest on this facility is based upon variable interest rates. Our weighted average borrowings under our Credit Facility during the first three quarters of fiscal 2019 was $30.0 million, and the annual effective interest rate for the Credit Facility for the third quarter of fiscal 2019 was 4.3%. We currently do not hedge against interest rate risk. Based on the foregoing, a hypothetical 1% increase or decrease in interest rates would have resulted in a change of $0.3 million to our interest expense in the first three quarters of fiscal 2019.

ITEM 4.  CONTROLS AND PROCEDURES

The Company's Chief Executive Officer and Chief Financial Officer have concluded, based on their evaluation as of the end of the period covered by this report, that the Company's disclosure controls and procedures (as defined in the Securities Exchange Act of 1934 Rules 13a-15(e) and 15d-15(e)) are effective to ensure that information required to be disclosed in the reports that the Company files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial

Officer, as appropriate, to allow timely decisions regarding financial disclosures.

Changes in Internal Control Over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting during the third quarter ended September 7, 2019 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

37

PART II

ITEM 1.  LEGAL PROCEEDINGS

No change since the filing of our 10-Q on July 25th, 2019.

38

ITEM 6.  EXHIBITS

31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	XBRL Instance Document
101.SCH*	XBRL Taxonomy Extension Schema Document
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF*	XBRL Taxonomy Extension Definition Linkbase Document

*In accordance with Regulation S-T, the XBRL-related information in Exhibits 101 to this Quarterly Report on Form 10-Q shall be deemed to be "furnished" and not "filed."

39

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

HERITAGE-CRYSTAL CLEAN, INC.

Date:	October 17, 2019	By:	/s/ Mark DeVita
			Mark DeVita
			Chief Financial Officer

40

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF PRESIDENT AND CEO — PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO RULES 13a-14(A) AND 15d-14(A)

OF THE SECURITIES EXCHANGE ACT OF 1934

I, Brian Recatto, certify that:

1. I have reviewed this Form 10-Q for the period ended September 7, 2019 of Heritage-Crystal Clean, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 17, 2019	By: /s/ Brian Recatto
	Brian Recatto
	President, CEO and Director — Principal Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

PURSUANT TO RULES 13a-14(A) AND 15d-14(A)

OF THE SECURITIES EXCHANGE ACT OF 1934

I, Mark DeVita, certify that:

1. I have reviewed this Form 10-Q for the period ended September 7, 2019 of Heritage-Crystal Clean, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: October 17, 2019	By: /s/ Mark DeVita
	Mark DeVita
	Chief Financial Officer

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Report of HERITAGE-CRYSTAL CLEAN, INC. (the “Company”) on Form 10-Q for the period ended June 15, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian Recatto, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: October 17, 2019	By: /s/ Brian Recatto
	Brian Recatto
	President, CEO and Director — Principal Executive Officer

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Report of HERITAGE-CRYSTAL CLEAN, INC. (the “Company”) on Form 10-Q for the period ended June 15, 2019, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Mark DeVita, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: October 17, 2019	By: /s/ Mark DeVita
	Mark DeVita
	Chief Financial Officer

XML

Inventory

8 Months Ended

Sep. 07, 2019

Inventory Disclosure [Abstract]

Inventory

INVENTORY

The carrying value of inventory consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Solvents and solutions	$	8,340	$	8,216
Used oil and processed oil	7,782		12,124
Machines	5,517		5,334
Drums and supplies	4,512		5,231
Other	2,510		2,378
Total inventory	28,661		33,283
Less: machine refurbishing reserve	402		224
Total inventory - net	$	28,259	$	33,059

Inventory consists primarily of used oil, processed oil, solvents and solutions, new and refurbished parts cleaning machines, drums and supplies, and other items. Inventories are valued at the lower of first-in, first-out (FIFO) cost or net realizable value, net of any reserves for excess, obsolete, or unsalable inventory. The Company routinely 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 Company had no inventory write downs during the first three quarters of fiscal 2019 or fiscal 2018.

XML

Debt and Financing Arrangements

8 Months Ended

Sep. 07, 2019

Debt Disclosure [Abstract]

Debt and Financing Arrangements

DEBT AND FINANCING ARRANGEMENTS

Bank Credit Facility

The Company's Credit Agreement as amended ("Credit Agreement"), provides for borrowings of up to $95.0 million, subject to the satisfaction of certain terms and conditions, comprised of a term loan of $30.0 million and up to $65.0 million of borrowings under the revolving loan portion. The actual amount of borrowings 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 London Interbank Offering Rate (“LIBOR”) plus 1%, or (c) Bank of America'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 (i) the 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 contains customary terms and provisions (including representations, covenants, and conditions) for transactions of this type. Certain covenants, among other things, restrict the Company's and its subsidiaries' ability to incur indebtedness, grant liens, make investments and sell assets. The Credit Agreement also contains customary events of default, covenants and representations and warranties. Financial covenants include:

• An interest coverage ratio (based on interest expense and EBITDA) of at least 3.5 to 1.0;

• A total leverage ratio no greater than 3.00 to 1.00, provided that in the event of a permitted acquisition having an aggregate consideration equal to $10.0 million or more, at the Borrower’s election, the total leverage ratio shall be deemed to be 3.25 to 1.00 for the fiscal quarter in which such permitted acquisition occurs and the three immediately following fiscal quarters and thereafter will revert to 3.00 to 1.00; and

• A capital expenditures covenant limiting capital expenditures to $100.0 million plus, if the capital expenditures permitted have been fully utilized, an additional amount for the remaining term of the Credit Agreement equal to 35% of EBITDA for the thirteen “four-week” periods most recently ended immediately prior to the full utilization of such $100.0 million basket.

The Credit Agreement places certain limitations on acquisitions and the payment of dividends.

Debt at September 7, 2019 and December 29, 2018 consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Principal amount	$	30,000	$	30,000
Less: unamortized debt issuance costs	745		954
Debt less unamortized debt issuance costs	$	29,255	$	29,046

For the third quarter ended September 7, 2019, the Company recorded interest expense of $0.4 million, of which $0.3 million is with respect to our term loan, and $0.1 million relates to amortization of debt issuance costs. The Company recorded interest expense of $0.4 million for the third quarter ended September 8, 2018 which related primarily to our term loan. During the first three quarters of fiscal 2019, the Company recorded interest expense of $1.2 million which related primarily to our term loan. In the first three quarters of fiscal 2018 the Company recorded interest expense of $1.0 million.

The Company's weighted average interest rate for all debt as of September 7, 2019, and September 8, 2018 was 4.3% and 3.8%, respectively.

As of September 7, 2019 and December 29, 2018, the Company was in compliance with all covenants under its Credit Agreement. As of September 7, 2019 and December 29, 2018, the Company had $1.1 million and $1.3 million of standby letters of credit issued, respectively, and $62.5 million and $63.7 million was available for borrowing under the bank credit facility, respectively. We believe that the carrying value of our debt balance at September 7, 2019 approximates fair value.

Scheduled Maturities of Debt

(thousands)
Fiscal Year:	Term Loan
2019	$	—
2020	—
2021	—
2022	30,000
2023	—
Aggregate Maturities	$	30,000

XML

Commitments and Contingencies (Tables)

8 Months Ended

Sep. 07, 2019

Commitments and Contingencies Disclosure [Abstract]

Components of Lease Expense

The components of lease expense were as follows:

(thousands)	For the Third Quarter Ended, September 7, 2019		First Three Quarters Ended, September 7, 2019
Finance lease cost:
Amortization of right-of-use Assets	$	25	$	25
Interest on lease liabilities	6		6
Total finance lease cost	$	31	$	31
Operating lease cost	$	5,914	$	18,366
Short-term lease cost	1,579		3,650
Variable lease cost	827		2,794
Total lease cost	$	8,320	$	24,810
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	$	4	$	4
Operating cash flows from operating leases	$	6,554	$	19,805
Financing cash flows from financing leases	$	13	$	13
Right-of-use assets obtained in exchange for new finance lease liabilities	$	1,487	$	1,487
Right-of-use assets obtained in exchange for new operating lease liabilities	$	12,099	$	92,226
Weighted-average remaining lease term (years)
Finance leases			6.90
Operating leases			4.80
Weighted-average discount rate
Finance leases			3.4		%
Operating leases			5.7		%

Future Annual Minimum Lease Payment Commitments

Future annual minimum lease payment commitments as of September 7, 2019 were as follows:

(thousands)
2019	$	7,770
2020	22,835
2021	18,681
2022	14,685
2023	10,840
2024 and thereafter	16,440
Total minimum lease payments	$	91,251
Less: imputed interest	11,703
Lease liability	$	79,548

Schedule of Future Minimum Rental Payments for Operating Leases

As disclosed in our 2018 Annual Report on Form 10-K, and under the previous lease accounting standard 840, future minimum lease payments due under noncancelable operating lease agreements as of December 29, 2018 were as follows:

(thousands)
2019	$	22,226
2020	16,095
2021	12,458
2022	9,247
2023	6,020
2024 and thereafter	5,786
Total minimum lease payments	$	71,832

Rental Income

Rental income for the third quarter and first three quarters ended September 7, 2019 was as follows:

	Third Quarter Ended,						First Three Quarters Ended,
	September 7, 2019						September 7, 2019
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	5,620	$	—	$	5,620	$	14,791	$	—	$	14,791
Railcars	—		35		35		—		147		147
Property	—		13		13		—		29		29
Total rental income	$	5,620	$	48	$	5,668	$	14,791	$	176	$	14,967

XML

Goodwill and Other Intangible Assets (Tables)

8 Months Ended

Sep. 07, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table shows changes to our goodwill balances by segment from December 29, 2018 to September 7, 2019:

(thousands)	Oil Business			Environmental Services			Total
Goodwill at December 29, 2018
Gross carrying amount	$	3,952		$	34,123		$	38,075
Accumulated impairment loss	(3,952		)	—			(3,952		)
Net book value at December 29, 2018	$	—		$	34,123		$	34,123
Acquisitions	—			384			—
Measurement period adjustments	—			(1,763		)	—
Goodwill at September 7, 2019
Gross carrying amount	3,952			32,744			36,696
Accumulated impairment loss	(3,952		)	—			(3,952		)
Net book value at September 7, 2019	$	—		$	32,744		$	32,744

Schedule of Intangible Assets

The following is a summary of software and other intangible assets:

	September 7, 2019						December 29, 2018
(thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer & supplier relationships	$	25,285	$	13,108	$	12,177	$	23,686	$	11,445	$	12,241
Software	6,641		4,605		2,036		5,040		4,094		946
Non-compete agreements	3,422		3,032		390		2,937		2,904		33
Patents, formulae, and licenses	1,769		753		1,016		1,769		708		1,061
Other	1,701		1,171		530		1,442		1,042		400
Total software and intangible assets - net	$	38,818	$	22,669	$	16,149	$	34,874	$	20,193	$	14,681

The weighted average useful lives of software and other intangibles are as follows:

	Weighted average useful life (years)
Patents, formulae, & licenses	15
Customer and supplier relationships	11
Software	10
Non-compete agreements	5
Other intangibles	7

Schedule of Expected Amortization Expense

The estimated amortization expense for the remainder of fiscal 2019 and each of the five succeeding fiscal years is as follows:

(millions)
Fiscal Year	Amortization Expense
2019	$1.0
2020	3.1
2021	2.9
2022	2.7
2023	2.1
2024	0.6

XML

Summary of Significant Accounting Policies - Recently Issued Accounting Standards Adopted (Details) - USD ($)	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Mar. 23, 2019	Sep. 07, 2019	Dec. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use assets	$ 79,498,000		$ 79,498,000
Lease liabilities	79,548,000		79,548,000
Deferred rental income	0		300,000
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use assets	$ 79,498,000		$ 79,498,000	$ 63,300,000
Lease liabilities				$ 63,300,000
Deferred rental income		$ 2,200,000

XML

Segment Information - Assets by Segment (Details) - USD ($) $ in Thousands	Sep. 07, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
Assets	$ 448,553	$ 347,822
Segments | Environmental Services
Segment Reporting Information [Line Items]
Assets	214,147	148,192
Segments | Oil Business
Segment Reporting Information [Line Items]
Assets	159,552	142,691
Unallocated Corporate Assets
Segment Reporting Information [Line Items]
Assets	$ 74,854	$ 56,939

XML

Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	8 Months Ended
	Sep. 07, 2019	Dec. 29, 2018
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 36,696	$ 38,075
Accumulated impairment loss	(3,952)	(3,952)
Goodwill [Roll Forward]
Net book value, beginning balance	34,123
Acquisitions	0
Measurement period adjustments	0
Net book value, ending balance	32,744
Oil Business
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	3,952	3,952
Accumulated impairment loss	(3,952)	(3,952)
Goodwill [Roll Forward]
Net book value, beginning balance	0
Acquisitions	0
Measurement period adjustments	0
Net book value, ending balance	0
Environmental Services
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	32,744	34,123
Accumulated impairment loss	0	$ 0
Goodwill [Roll Forward]
Net book value, beginning balance	34,123
Acquisitions	384
Measurement period adjustments	(1,763)
Net book value, ending balance	$ 32,744

XML

Debt and Financing Arrangements - Narrative (Details) - USD ($)	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018	Dec. 29, 2018
Debt Instrument [Line Items]
Interest costs incurred	$ 400,000		$ 1,200,000	$ 1,000,000
Amortization of debt issuance costs	$ 100,000
Weighted average interest rate	4.30%	3.80%	4.30%	3.80%
Letters of credit outstanding	$ 1,100,000		$ 1,100,000		$ 1,300,000
Current borrowing capacity	62,500,000		$ 62,500,000		$ 63,700,000
Term Loan
Debt Instrument [Line Items]
Interest costs incurred	300,000	$ 400,000
Credit Agreement
Debt Instrument [Line Items]
Minimum interest coverage ratio			3.5
Maximum total leverage ratio			3.0
Aggregate consideration limit			$ 10,000,000.0
Leverage ratio at time of acquisition			3.25
Capital expenditures covenant limit			$ 100,000,000.0
Percentage of EBITDA			35.00%
Credit Agreement | Bank Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	95,000,000.0		$ 95,000,000.0
Credit Agreement | Bank Credit Facility | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.50%
Credit Agreement | Bank Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.00%
Credit Agreement | Bank Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate			1.75%
Credit Agreement | Bank Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate			2.75%
Credit Agreement | Bank Credit Facility | Bank of America's Prime Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate			0.75%
Credit Agreement | Bank Credit Facility | Bank of America's Prime Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate			1.75%
Credit Agreement | Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	30,000,000.0		$ 30,000,000.0
Credit Agreement | Revolving Loan Portion
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 65,000,000.0		$ 65,000,000.0

XML

Accounts Receivable - Components of Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 07, 2019	Dec. 29, 2018	Dec. 30, 2017
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Trade	$ 53,992	$ 51,118
Less: allowance for doubtful accounts	1,875	1,816	$ 1,881
Trade - net	52,117	49,302
Related parties	1,805	1,595
Other	1,731	847
Total accounts receivable - net	$ 55,653	$ 51,744

XML

Business Combinations - Narrative (Details) - USD ($)							8 Months Ended
	Oct. 17, 2019	Mar. 25, 2019	Feb. 01, 2019	Jan. 11, 2019	Jun. 11, 2018	May 03, 2018	Sep. 07, 2019
Business Acquisition [Line Items]
Decrease to goodwill							$ 0
All Valley Disposal, Inc.
Business Acquisition [Line Items]
Purchase price		$ 600,000
WSS
Business Acquisition [Line Items]
Purchase price			$ 500,000
GlyEco
Business Acquisition [Line Items]
Purchase price				$ 1,600,000
PPI
Business Acquisition [Line Items]
Purchase price						$ 5,900,000
Increase to property, plant, & equipment							200,000
Increase to other intangible assets							1,500,000
Decrease to contingent consideration							100,000
Decrease to goodwill							1,800,000
Performance metrics period						3 years
Minimum contingent consideration							0
Maximum contingent consideration							$ 1,500,000.0
HTSC
Business Acquisition [Line Items]
Purchase price					$ 700,000
Estimate | HTSC
Business Acquisition [Line Items]
Expected contingent consideration	$ 100,000
Maximum | All Valley Disposal, Inc.
Business Acquisition [Line Items]
Purchase price		$ 1,300,000

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Goodwill and Other Intangibles Assets - Narrative (Details) $ in Millions	3 Months Ended		8 Months Ended
	Sep. 07, 2019 USD ($)	Sep. 08, 2018 USD ($)	Sep. 07, 2019 USD ($) reporting_unit	Sep. 08, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Number of reporting units | reporting_unit			2
Amortization of intangible assets | $	$ 0.7	$ 0.7	$ 2.5	$ 2.2

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Commitments and Contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Details) $ in Thousands	Dec. 29, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2019	$ 22,226
2020	16,095
2021	12,458
2022	9,247
2023	6,020
2024 and thereafter	5,786
Total minimum lease payments	$ 71,832

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Share-based Compensation - Schedule of Restricted Stock Unit Activity (Details) - USD ($) $ in Thousands	1 Months Ended					8 Months Ended
	May 31, 2019	May 31, 2018	Apr. 30, 2018	Feb. 28, 2018	Feb. 28, 2017	Sep. 07, 2019	Sep. 08, 2018	Dec. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)						34,150
Restricted stock | April, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)			350,000
Compensation Expense						$ 661	$ 817
Unrecognized Expense						3,887		$ 6,633
Restricted stock | Members of Management | February, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)					146,564
Compensation Expense						249	318
Unrecognized Expense						118		385
Restricted stock | Members of Management | February, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)				116,958
Compensation Expense						373	374
Unrecognized Expense						804		1,176
Restricted stock | Members of Management | May, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)	23,560
Compensation Expense						136	0
Unrecognized Expense						500		0
Restricted stock | Chief Executive Officer | February, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)					500,000
Compensation Expense						569	921
Unrecognized Expense						661		1,230
Restricted stock | Board of Directors | May, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)		13,800
Compensation Expense						0	197
Unrecognized Expense						0		0
Restricted stock | Board of Directors | May, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)	10,590
Compensation Expense						197	$ 0
Unrecognized Expense						$ 88		$ 0

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 07, 2019	Dec. 29, 2018
Current assets:
Cash and cash equivalents	$ 58,951	$ 43,579
Accounts receivable - net	55,653	51,744
Inventory - net	28,259	33,059
Other current assets	7,186	6,835
Total current assets	150,049	135,217
Property, plant and equipment - net	145,954	139,987
Right of use assets	79,498
Equipment at customers - net	24,159	23,814
Software and intangible assets - net	16,149	14,681
Goodwill	32,744	34,123
Total assets	448,553	347,822
Current liabilities:
Accounts payable	35,089	32,630
Current portion of lease liabilities	20,257
Contract liabilities - net	2,332	166
Accrued salaries, wages, and benefits	6,051	6,024
Taxes payable	7,112	6,120
Other current liabilities	4,989	5,089
Total current liabilities	75,830	50,029
Lease liabilities, net of current portion	59,291
Long-term debt	29,255	29,046
Deferred income taxes	17,870	14,516
Total liabilities	182,246	93,591
STOCKHOLDERS' EQUITY:
Common stock - 26,000,000 shares authorized at $0.01 par value, 23,185,567 shares and 23,058,584 shares issued and outstanding at September 7, 2019 and December 29, 2018, respectively	232	231
Additional paid-in capital	199,216	197,533
Retained earnings	66,333	55,819
Total Heritage-Crystal Clean, Inc. stockholders' equity	265,781	253,583
Noncontrolling interest	526	648
Total equity	266,307	254,231
Total liabilities and stockholders' equity	$ 448,553	$ 347,822

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		8 Months Ended		12 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018	Dec. 29, 2018
Cash flows from Operating Activities:
Net income	$ 6,056	$ 6,419	$ 10,792	$ 12,437
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	3,980	3,776	12,176	11,078
Bad debt provision			829	177	$ 628
Share-based compensation			2,743	3,060
Deferred taxes			3,354	3,998
Other, net			594	215
Changes in operating assets and liabilities:
Increase in accounts receivable			(4,344)	(4,780)
Decrease (increase) in inventory			5,136	(7,845)
Increase in other current assets			(351)	(851)
Increase in accounts payable			2,005	5,670
Increase (decrease) in accrued liabilities			3,391	(157)
Cash provided by operating activities			36,325	23,002
Cash flows from Investing Activities:
Capital expenditures			(16,921)	(12,874)
Business acquisitions, net of cash acquired			(2,573)	(4,805)
Proceeds from the disposal of assets			0	80
Cash used in investing activities			(19,494)	(17,599)
Cash flows from Financing Activities:
Proceeds from the exercise of stock options			20	103
Share repurchases to satisfy tax withholding obligations			(1,427)	(1,030)
Proceeds from the issuance of common stock			348	311
Distributions to noncontrolling interest			(400)	(361)
Cash used in financing activities			(1,459)	(977)
Net increase in cash and cash equivalents			15,372	4,426
Cash and cash equivalents, beginning of period			43,579	41,889	41,889
Cash and cash equivalents, end of period	$ 58,951	$ 46,315	58,951	46,315	$ 43,579
Supplemental disclosure of cash flow information:
Income taxes paid			1,205	371
Cash paid for interest			971	846
Supplemental disclosure of non-cash information:
Payables for construction in progress			$ 904	$ 526

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Accounts Receivable (Tables)

8 Months Ended

Sep. 07, 2019

Accounts Receivable, after Allowance for Credit Loss [Abstract]

Schedule of Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable for the third quarter ended September 7, 2019, and the fiscal year ended December 29, 2018 consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Trade	$	53,992	$	51,118
Less: allowance for doubtful accounts	1,875		1,816
Trade - net	52,117		49,302
Related parties	1,805		1,595
Other	1,731		847
Total accounts receivable - net	$	55,653	$	51,744

The following table provides the changes in the Company’s allowance for doubtful accounts for the three quarters ended September 7, 2019, and the fiscal year ended December 29, 2018:

(thousands)	September 7, 2019			December 29, 2018
Balance at beginning of period	$	1,816		$	1,881
Provision for bad debts	829			628
Accounts written off, net of recoveries	(770		)	(693		)
Balance at end of period	$	1,875		$	1,816

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Share-based Compensation

8 Months Ended

Sep. 07, 2019

Share-based Payment Arrangement [Abstract]

Share-based Compensation

SHARE-BASED COMPENSATION

On February 20, 2019, the Compensation Committee and the Board of Directors of the Company adopted the 2019 Incentive Award Plan (the “2019 Plan”), to replace the Company’s 2008 Omnibus Incentive Plan (“2008 Plan”), which expired in March 2018. The 2019 Plan was approved during the second quarter of 2019 and authorizes 1,500,000 shares to be available for award grants.

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 common 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. In addition, the Company may grant restricted shares to certain members of management based on their services and contingent upon continued service with the Company. The restricted shares vest over a period of approximately three years from the grant date. The fair value of each restricted stock grant is based on the closing price of the Company's common stock on the date of grant.

The following table shows a summary of restricted share grants and expense resulting from the awards:

			Compensation Expense
(thousands, except share amounts)			First Three Quarters Ended,				Unrecognized Expense as of,
Recipient of Grant	Grant Date	Restricted Shares	September 7, 2019		September 8, 2018		September 7, 2019		December 29, 2018
Members of Management	February, 2017	146,564	$	249	$	318	$	118	$	385
Chief Executive Officer	February, 2017	500,000	569		921		661		1,230
Members of Management	February, 2018	116,958	373		374		804		1,176
Special Incentive Grant	April, 2018	350,000	661		817		3,887		6,633
Board of Directors	May, 2018	13,800	—		197		—		—
Board of Directors	May, 2019	10,590	197		—		88		—
Members of Management	May, 2019	23,560	136		—		500		—

In February 2017, as part of Mr. Recatto's employment agreement, the Company granted a restricted stock award of 500,000 shares of common stock, which vests through January 2021 in an amount based on the vesting table below, with the common stock price increase to be determined based on the increase in the price of the Company’s common stock (if any) from the closing price of the common stock as reported by Nasdaq on the employment commencement date ($15.00) and the common stock price on the potential vesting date (determined by using the weighted average closing price of a share of the Company's common stock for the 90-day period ending on the vesting date). If the stock price does not increase by $5.00, then no shares shall vest. During the first three quarters of fiscal 2019, the Company recorded approximately $0.6 million of compensation expense related to this award. In the future, the Company expects to recognize compensation expense of approximately $0.7 million over the remaining requisite service period, which ends January 31, 2021. The fair value of this restricted stock award as of the grant date was estimated using a Monte Carlo simulation model. Key assumptions used in the Monte Carlo simulation to estimate the grant date fair value of this award are a risk-free rate of 1.70%, expected dividend yield of zero, and an expected volatility assumption of 41.73%.

Vesting Table
Increase in Stock Price From the Employment Commencement Date to the Vesting Date	Total Percentage of Restricted Stock Shares to Be Vested
Less than $5 per share increase	—%
$5 per share increase	25%
$10 per share increase	50%
$15 per share increase	75%
$20 or more per share increase	100%

Provision for possible accelerated vesting of award

If the average closing price of the Company's common stock increases by the marginal levels set forth in the above vesting table for any consecutive 180 day period between the award date and final vesting date, Mr. Recatto shall become vested in 50% of the corresponding total percentage of restricted shares earned on the last day of the 180 day period.

Vestings

On June 10, 2019, the average closing price of the Company's common stock met the 50% marginal level and Mr. Recatto became fully vested in half of the 125,000 vested shares. On March 14, 2018, the average closing price of the Company's common stock met the 25% marginal level and Mr. Recatto became fully vested in half of the 125,000 vested shares.

The following table summarizes the restricted stock activity for the first three quarters ended September 7, 2019:

Restricted Stock (Nonvested Shares)	Number of Shares		Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at December 29, 2018	1,013,863		$	18.20
Granted	34,150		26.54
Vested	(158,372	)	16.52
Forfeited	(105,062	)	22.01
Nonvested shares outstanding at September 7, 2019	784,579		$	18.39

Employee Stock Purchase Plan

As of September 7, 2019, the Company had reserved 115,022 shares of common stock available for purchase under the Employee Stock Purchase Plan. In the first three quarters of fiscal 2019, employees purchased 14,240 shares of the Company’s common stock with a weighted average fair market value of $25.72 per share.

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Summary of Significant Accounting Policies (Policies)

8 Months Ended

Sep. 07, 2019

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 29, 2018. Each of the Company's first three fiscal quarters consists of twelve weeks while the last fiscal quarter consists of sixteen or seventeen weeks.

Recently Issued Accounting Pronouncements

Recently Issued Accounting Pronouncements
Standard	Issuance Date	Description	Our Effective Date	Effect on the Financial Statements
ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.”	June 2016	This update modifies the impairment model for most financial assets and certain other instruments. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities will be required to utilize a new forward-looking “expected loss” methodology that generally will result in the earlier recognition of allowance for losses.	December 29, 2019	The Company is evaluating the impact this new standard would have on our consolidated financial statements.

Recently Issued Accounting Standards Adopted
Standard	Issuance Date	Description	Effective Date	Effect on the Financial Statements
ASU 2016-02 Leases (Topic 842), and subsequent updates	February 2016	This update was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. Early application of the amendments in this update is permitted for all entities.	December 30, 2018	The Company adopted the new leasing standard ASC 842 "Leases" on December 30, 2018. ASU 2016-02 provides for a modified retrospective transition  approach requiring lessees to recognize and measure leases on the balance sheet at the beginning of either the earliest period presented or as of the beginning of the period of adoption. The Company elected to apply ASU 2016-02 as of the beginning of the period of adoption (December 30, 2018) and will not restate comparative periods. The adoption resulted in the recognition of $63.3 million of right of use assets and $63.3 million of lease liabilities. The Company recognized approximately $2.2 million of deferred rental income from certain embedded leases during the first quarter of 2019.

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Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018	Dec. 29, 2018
Property, Plant and Equipment [Abstract]
Machinery, vehicles, and equipment	$ 105,575		$ 105,575		$ 98,708
Buildings and storage tanks	69,876		69,876		69,791
Land	9,663		9,663		9,546
Leasehold improvements	5,838		5,838		5,701
Construction in progress	19,851		19,851		15,405
Assets held for sale	4		4		4
Total property, plant and equipment	210,807		210,807		199,155
Less: accumulated depreciation	64,853		64,853		59,168
Property, plant and equipment - net	145,954		145,954		139,987
Equipment at customers	76,469		76,469		73,075
Less: accumulated depreciation	52,310		52,310		49,261
Equipment at customers - net	24,159		24,159		$ 23,814
Depreciation expense	$ 3,300	$ 3,100	$ 9,700	$ 8,900

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Revenue - Contract Assets and Contract Liabilities from Contracts with Customers (Details) - USD ($)		3 Months Ended		8 Months Ended
	Dec. 30, 2018	Sep. 07, 2019	Mar. 23, 2019	Sep. 07, 2019	Dec. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract assets		$ 108,000		$ 108,000	$ 100,000
Contract liabilities		2,440,000		2,440,000	266,000
Contract liabilities - net		2,332,000		2,332,000	$ 166,000
Deferred rental income		$ 0		$ 300,000
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred rental income			$ 2,200,000
ASU 2016-02 | Rental Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred rental income	$ 2,200,000

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Summary of Significant Accounting Policies - Schedule of Cumulative Effects of Changes (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018	Jun. 15, 2019	Dec. 30, 2018	Dec. 29, 2018	Jun. 16, 2018	Dec. 30, 2017
Statement of Income
Revenues	$ 104,840	$ 99,674	$ 305,613	$ 283,123
Rental income	5,668		14,967
Operating income	8,483	8,959	14,832	17,175
Income before income taxes	8,302	8,703	14,203	16,433
Provision for income taxes	2,246	2,284	3,411	3,996
Net income	6,056	6,419	10,792	12,437
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$ 5,970	$ 6,345	$ 10,514	$ 12,224
Net income per share: basic (in dollars per share)	$ 0.26	$ 0.28	$ 0.45	$ 0.53
Net income per share: diluted (in dollars per share)	$ 0.25	$ 0.27	$ 0.45	$ 0.52
Balance Sheet
Right of use assets	$ 79,498		$ 79,498
Total assets	448,553		448,553				$ 347,822
Current portion of lease liabilities	20,257		20,257
Contract liabilities - net	2,332		2,332				166
Other current liabilities	4,989		4,989				5,089
Total current liabilities	75,830		75,830				50,029
Lease liabilities, net of current portion	59,291		59,291
Deferred income taxes	17,870		17,870				14,516
Total liabilities	182,246		182,246				93,591
Retained earnings	66,333		66,333				55,819
Heritage-Crystal Clean, Inc. stockholders' equity	265,781		265,781				253,583
Total equity	266,307	$ 250,178	266,307	$ 250,178	$ 259,109		254,231	$ 242,450	$ 235,926
Total liabilities and stockholders' equity	448,553		448,553				$ 347,822
Service revenues
Statement of Income
Revenues	57,208	$ 58,054	171,522	$ 172,205
ASU 2016-02
Statement of Income
Revenues	33		(2,125)
Rental income	5,668		14,967
Operating income	33		(2,125)
Income before income taxes	33		(2,125)
Provision for income taxes	9		(510)
Net income	24		(1,615)
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$ 24		$ (1,615)
Net income per share: basic (in dollars per share)	$ 0.00		$ (0.07)
Net income per share: diluted (in dollars per share)	$ 0.00		$ (0.07)
Balance Sheet
Right of use assets	$ 79,498		$ 79,498			$ 63,300
Total assets	79,498		79,498
Current portion of lease liabilities	20,257		20,257
Contract liabilities - net	2,125		2,125
Other current liabilities	(50)		(50)
Total current liabilities	22,332		22,332
Lease liabilities, net of current portion	59,291		59,291
Deferred income taxes	(510)		(510)
Total liabilities	81,113		81,113
Retained earnings	(1,615)		(1,615)
Heritage-Crystal Clean, Inc. stockholders' equity	(1,615)		(1,615)
Total equity	(1,615)		(1,615)
Total liabilities and stockholders' equity	79,498		79,498
ASU 2016-02 | Service revenues
Statement of Income
Revenues	(5,635)		(17,092)
Balances Without Adoption of Topic 842
Statement of Income
Revenues	104,807		307,738
Rental income	0		0
Operating income	8,450		16,957
Income before income taxes	8,269		16,328
Provision for income taxes	2,237		3,921
Net income	6,032		12,407
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$ 5,946		$ 12,129
Net income per share: basic (in dollars per share)	$ 0.26		$ 0.52
Net income per share: diluted (in dollars per share)	$ 0.25		$ 0.52
Balance Sheet
Right of use assets	$ 0		$ 0
Total assets	369,055		369,055
Current portion of lease liabilities	0		0
Contract liabilities - net	207		207
Other current liabilities	5,039		5,039
Total current liabilities	53,498		53,498
Lease liabilities, net of current portion	0		0
Deferred income taxes	18,380		18,380
Total liabilities	101,133		101,133
Retained earnings	67,948		67,948
Heritage-Crystal Clean, Inc. stockholders' equity	267,396		267,396
Total equity	267,922		267,922
Total liabilities and stockholders' equity	369,055		369,055
Balances Without Adoption of Topic 842 | Service revenues
Statement of Income
Revenues	$ 62,843		$ 188,614

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Commitments and Contingencies - Rental Income (Details) - USD ($) $ in Thousands	3 Months Ended	8 Months Ended
	Sep. 07, 2019	Sep. 07, 2019
Lessor, Lease, Description [Line Items]
Rental income	$ 5,668	$ 14,967
Environmental Services
Lessor, Lease, Description [Line Items]
Rental income	5,620	14,791
Oil Business
Lessor, Lease, Description [Line Items]
Rental income	48	176
Parts Cleaning
Lessor, Lease, Description [Line Items]
Rental income	5,620	14,791
Parts Cleaning | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income	5,620	14,791
Parts Cleaning | Oil Business
Lessor, Lease, Description [Line Items]
Rental income	0	0
Railcars
Lessor, Lease, Description [Line Items]
Rental income	35	147
Railcars | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income	0	0
Railcars | Oil Business
Lessor, Lease, Description [Line Items]
Rental income	35	147
Property
Lessor, Lease, Description [Line Items]
Rental income	13	29
Property | Environmental Services
Lessor, Lease, Description [Line Items]
Rental income	0	0
Property | Oil Business
Lessor, Lease, Description [Line Items]
Rental income	$ 13	$ 29

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Share-based Compensation - Restricted Stock Vesting Schedule by Percentage (Details) - Mr. Recatto - Restricted stock - $ / shares			1 Months Ended	8 Months Ended
	Jun. 10, 2019	Mar. 14, 2018	Feb. 28, 2017	Sep. 07, 2019
Less than $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)			$ 5
Total Percentage of Restricted Stock Shares to Be Vested			0.00%	50.00%
$5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)			$ 5
Total Percentage of Restricted Stock Shares to Be Vested	50.00%	25.00%	25.00%
$10 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)			$ 10
Total Percentage of Restricted Stock Shares to Be Vested			50.00%
$15 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)			$ 15
Total Percentage of Restricted Stock Shares to Be Vested			75.00%
$20 or more per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in stock price from employment commencement date (in dollars per share)			$ 20
Total Percentage of Restricted Stock Shares to Be Vested			100.00%

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Earnings Per Share

8 Months Ended

Sep. 07, 2019

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

The following table reconciles the number of shares outstanding for the third quarters and first three quarters of fiscal 2019 and 2018, 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:

	Third Quarter Ended,				First Three Quarters Ended,
(thousands, except per share amounts)	September 7, 2019		September 8, 2018		September 7, 2019		September 8, 2018
Net income	$	6,056	$	6,419	$	10,792	$	12,437
Less: income attributable to noncontrolling interest	86		74		278		213
Net income attributable to Heritage-Crystal Clean, Inc. available to common stockholders	$	5,970	$	6,345	$	10,514	$	12,224
Weighted average basic shares outstanding	23,185		23,048		23,146		23,013
Dilutive shares for share–based compensation plans	236		356		238		286
Weighted average diluted shares outstanding	23,421		23,404		23,384		23,299
Net income per share: basic	$	0.26	$	0.28	$	0.45	$	0.53
Net income per share: diluted	$	0.25	$	0.27	$	0.45	$	0.52

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Summary of Significant Accounting Policies (Tables)

8 Months Ended

Sep. 07, 2019

Accounting Policies [Abstract]

Schedule of Cumulative Effects of Changes

Effective December 30, 2018, the Company adopted the requirements of Topic 842. The cumulative effects of the changes made to our Statement of Income and Balance Sheet are as follows:

	For the Third Quarter Ended, September 7, 2019							For the First Three Quarters Ended, September 7, 2019
	As Reported		Balances Without Adoption of Topic 842		Effect of Change			As Reported		Balances Without Adoption of Topic 842		Effect of Change
(thousands, except per share amounts)					Higher/(Lower)							Higher/(Lower)
Statement of Income
Service revenues	$	57,208	$	62,843	$	(5,635	)	$	171,522	$	188,614	$	(17,092	)
Rental income	5,668		—		5,668			14,967		—		14,967
Total revenues	104,840		104,807		33			305,613		307,738		(2,125		)
Operating income	8,483		8,450		33			14,832		16,957		(2,125		)
Income before income taxes	8,302		8,269		33			14,203		16,328		(2,125		)
Provision for income taxes	2,246		2,237		9			3,411		3,921		(510		)
Net income	6,056		6,032		24			10,792		12,407		(1,615		)
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$	5,970	$	5,946	$	24		$	10,514	$	12,129	$	(1,615	)
Net income per share: basic	$	0.26	$	0.26	$	—		$	0.45	$	0.52	$	(0.07	)
Net income per share: diluted	$	0.25	$	0.25	$	—		$	0.45	$	0.52	$	(0.07	)

	September 7, 2019
	As Reported		Balances Without Adoption of Topic 842		Effect of Change
(thousands)					Higher/(Lower)
Balance Sheet
Right of use assets	$	79,498	$	—	$	79,498
Total assets	448,553		369,055		79,498
Current portion of lease liabilities	20,257		—		20,257
Contract liabilities - net	2,332		207		2,125
Other current liabilities	4,989		5,039		(50		)
Total current liabilities	75,830		53,498		22,332
Lease liabilities, net of current portion	59,291		—		59,291
Deferred income taxes	17,870		18,380		(510		)
Total liabilities	182,246		101,133		81,113
Retained earnings	66,333		67,948		(1,615		)
Heritage-Crystal Clean, Inc. stockholders' equity	265,781		267,396		(1,615		)
Total equity	266,307		267,922		(1,615		)
Total liabilities and stockholders' equity	$	448,553	$	369,055	$	79,498

XML

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (268,000)
Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(268,000)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (268,000)

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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 07, 2019	Dec. 29, 2018
Statement of Financial Position [Abstract]
Common stock, shares authorized (in shares)	26,000,000	26,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	23,185,567	23,058,584
Common stock, shares outstanding (in shares)	23,185,567	23,058,584

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Organization and Nature of Operations

8 Months Ended

Sep. 07, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Nature of Operations

ORGANIZATION AND NATURE OF OPERATIONS

Heritage-Crystal Clean, Inc., a Delaware corporation and its subsidiaries (collectively the “Company”), provide parts cleaning, hazardous and non-hazardous containerized waste, used oil collection, vacuum, antifreeze recycling and field services primarily to small and mid-sized industrial and vehicle maintenance customers. The Company 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 products. The Company also has multiple locations where it dehydrates used oil. The oil processed at these locations is sold as recycled fuel oil. The Company also operates multiple wastewater treatment plants and antifreeze recycling facilities at which it produces virgin-quality antifreeze. The Company's locations are in the United States and Ontario, Canada. 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 has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists of the Company's parts cleaning, containerized waste management, vacuum truck services, antifreeze recycling activities, and field services. The Oil Business segment consists of the Company's used oil collection, recycled fuel oil sales, used oil re-refining activities, and used oil filter removal and disposal services. No customer represented greater than 10% of consolidated revenues for any of the periods presented. There were no intersegment revenues. Both segments operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

The Company’s fiscal year ends on the Saturday closest to December 31. The most recent fiscal year ended on December 29, 2018. 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; service revenues include servicing of parts cleaning machines, drum waste removal services, vacuum truck services, field services, and other services; rental income includes embedded lease income from certain of our parts cleaning contracts. In the Company's Oil Business segment, product revenues primarily consist of sales of re-refined base oil, re-refinery co-products and recycled fuel oil; service revenues include revenues from used oil collection activities, collecting and disposing of waste water and removal and disposal of used oil filters. Due to the Company's integrated business model, it is impracticable to separately present costs of tangible products and costs of services.

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Inventory (Tables)

8 Months Ended

Sep. 07, 2019

Inventory Disclosure [Abstract]

Schedule of Inventory

The carrying value of inventory consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Solvents and solutions	$	8,340	$	8,216
Used oil and processed oil	7,782		12,124
Machines	5,517		5,334
Drums and supplies	4,512		5,231
Other	2,510		2,378
Total inventory	28,661		33,283
Less: machine refurbishing reserve	402		224
Total inventory - net	$	28,259	$	33,059

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Property, Plant, and Equipment

8 Months Ended

Sep. 07, 2019

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment

PROPERTY, PLANT, AND EQUIPMENT

Property, plant, and equipment consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Machinery, vehicles, and equipment	$	105,575	$	98,708
Buildings and storage tanks	69,876		69,791
Land	9,663		9,546
Leasehold improvements	5,838		5,701
Construction in progress	19,851		15,405
Assets held for sale	4		4
Total property, plant and equipment	210,807		199,155
Less: accumulated depreciation	64,853		59,168
Property, plant and equipment - net	$	145,954	$	139,987
(thousands)	September 7, 2019		December 29, 2018
Equipment at customers	$	76,469	$	73,075
Less: accumulated depreciation	52,310		49,261
Equipment at customers - net	$	24,159	$	23,814

Depreciation expense for the third quarters ended September 7, 2019 and September 8, 2018 was $3.3 million and $3.1 million, respectively. Depreciation expense for the first three quarters ended September 7, 2019 and September 8, 2018 was $9.7 million and $8.9 million, respectively.

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Segment Information

8 Months Ended

Sep. 07, 2019

Segment Reporting [Abstract]

Segment Information

SEGMENT INFORMATION

The Company has two reportable segments: "Environmental Services" and "Oil Business." The Environmental Services segment consists primarily of the Company's parts cleaning, containerized waste management, vacuum truck service, antifreeze recycling activities, and field services. The Oil Business segment consists primarily of the Company's used oil collection, used oil re-refining activities, and the dehydration of used oil to be sold as recycled fuel oil.

No single customer in either segment accounted for more than 10.0% of consolidated revenues in any of the periods presented. There were no intersegment revenues. Both the Environmental Services and Oil Business segment operate in the United States and, to an immaterial degree, in Ontario, Canada. As such, the Company is not disclosing operating results by geographic segment.

Segment results for the third quarters ended September 7, 2019, and September 8, 2018 were as follows:

Third Quarter Ended,
September 7, 2019
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	54,066	$	3,142	$	—	$	57,208
	Product revenues	9,305		32,659		—		41,964
	Rental income	5,620		48		—		5,668
Total revenues		$	68,991	$	35,849	$	—	$	104,840
Operating expenses
	Operating costs	49,486		30,630		—		80,116
	Operating depreciation and amortization	1,743		1,441		—		3,184
Profit before corporate selling, general, and administrative expenses		$	17,762	$	3,778	$	—	$	21,540
Selling, general, and administrative expenses						11,241		11,241
Depreciation and amortization from SG&A						796		796
Total selling, general, and administrative expenses						$	12,037	$	12,037
Other expense - net						1,020		1,020
Operating income								8,483
Interest expense – net						181		181
Income before income taxes								$	8,302

Third Quarter Ended,
September 8, 2018
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	55,473	$	2,581	$	—	$	58,054
	Product revenues	7,834		33,786		—		41,620
Total revenues		$	63,307	$	36,367	$	—	$	99,674
Operating expenses
	Operating costs	45,460		30,585		—		76,045
	Operating depreciation and amortization	1,599		1,410		—		3,009
Profit before corporate selling, general, and administrative expenses		$	16,248	$	4,372	$	—	$	20,620
Selling, general, and administrative expenses						10,641		10,641
Depreciation and amortization from SG&A						767		767
Total selling, general, and administrative expenses						$	11,408	$	11,408
Other expense - net						253		253
Operating income								8,959
Interest expense – net						256		256
Income before income taxes								$	8,703

Segment results for the first three quarters ended September 7, 2019, and September 8, 2018 were as follows:

First Three Quarters Ended,
September 7, 2019
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	161,273	$	10,249	$	—	$	171,522
	Product revenues	29,620		89,504		—		119,124
	Rental income	14,791		176		—		14,967
Total revenues		$	205,684	$	99,929	$	—	$	305,613
Operating expenses
	Operating costs	149,024		92,425		—		241,449
	Operating depreciation and amortization	5,252		4,308		—		9,560
Profit before corporate selling, general, and administrative expenses		$	51,408	$	3,196	$	—	$	54,604
Selling, general, and administrative expenses						34,679		34,679
Depreciation and amortization from SG&A						2,616		2,616
Total selling, general, and administrative expenses						$	37,295	$	37,295
Other expense - net						2,477		2,477
Operating income								14,832
Interest expense – net						629		629
Income before income taxes								$	14,203

First Three Quarters Ended,
September 8, 2018
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	163,428	$	8,777	$	—	$	172,205
	Product revenues	21,798		89,120		—		110,918
Total revenues		$	185,226	$	97,897	$	—	$	283,123
Operating expenses
	Operating costs	134,640		86,062		—		220,702
	Operating depreciation and amortization	4,590		4,188		—		8,778
Profit before corporate selling, general, and administrative expenses		$	45,996	$	7,647	$	—	$	53,643
Selling, general, and administrative expenses						33,185		33,185
Depreciation and amortization from SG&A						2,300		2,300
Total selling, general, and administrative expenses						$	35,485	$	35,485
Other expense - net						983		983
Operating income								17,175
Interest expense – net						742		742
Income before income taxes								$	16,433

Total assets by segment as of September 7, 2019, and December 29, 2018 were as follows:

(thousands)		September 7, 2019		December 29, 2018
Total Assets:
	Environmental Services	$	214,147	$	148,192
	Oil Business	159,552		142,691
	Unallocated Corporate Assets	74,854		56,939
	Total	$	448,553	$	347,822

Segment assets for the Environmental Services and Oil Business segments consist of property, plant, and equipment, right-of-use assets, intangible assets, accounts receivable, goodwill, and inventories. 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.

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Organization and Nature of Operations (Details)	8 Months Ended
	Sep. 07, 2019 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	2

XML

Segment Information (Tables)

8 Months Ended

Sep. 07, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Segment results for the third quarters ended September 7, 2019, and September 8, 2018 were as follows:

Third Quarter Ended,
September 7, 2019
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	54,066	$	3,142	$	—	$	57,208
	Product revenues	9,305		32,659		—		41,964
	Rental income	5,620		48		—		5,668
Total revenues		$	68,991	$	35,849	$	—	$	104,840
Operating expenses
	Operating costs	49,486		30,630		—		80,116
	Operating depreciation and amortization	1,743		1,441		—		3,184
Profit before corporate selling, general, and administrative expenses		$	17,762	$	3,778	$	—	$	21,540
Selling, general, and administrative expenses						11,241		11,241
Depreciation and amortization from SG&A						796		796
Total selling, general, and administrative expenses						$	12,037	$	12,037
Other expense - net						1,020		1,020
Operating income								8,483
Interest expense – net						181		181
Income before income taxes								$	8,302

Third Quarter Ended,
September 8, 2018
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	55,473	$	2,581	$	—	$	58,054
	Product revenues	7,834		33,786		—		41,620
Total revenues		$	63,307	$	36,367	$	—	$	99,674
Operating expenses
	Operating costs	45,460		30,585		—		76,045
	Operating depreciation and amortization	1,599		1,410		—		3,009
Profit before corporate selling, general, and administrative expenses		$	16,248	$	4,372	$	—	$	20,620
Selling, general, and administrative expenses						10,641		10,641
Depreciation and amortization from SG&A						767		767
Total selling, general, and administrative expenses						$	11,408	$	11,408
Other expense - net						253		253
Operating income								8,959
Interest expense – net						256		256
Income before income taxes								$	8,703

Segment results for the first three quarters ended September 7, 2019, and September 8, 2018 were as follows:

First Three Quarters Ended,
September 7, 2019
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	161,273	$	10,249	$	—	$	171,522
	Product revenues	29,620		89,504		—		119,124
	Rental income	14,791		176		—		14,967
Total revenues		$	205,684	$	99,929	$	—	$	305,613
Operating expenses
	Operating costs	149,024		92,425		—		241,449
	Operating depreciation and amortization	5,252		4,308		—		9,560
Profit before corporate selling, general, and administrative expenses		$	51,408	$	3,196	$	—	$	54,604
Selling, general, and administrative expenses						34,679		34,679
Depreciation and amortization from SG&A						2,616		2,616
Total selling, general, and administrative expenses						$	37,295	$	37,295
Other expense - net						2,477		2,477
Operating income								14,832
Interest expense – net						629		629
Income before income taxes								$	14,203

First Three Quarters Ended,
September 8, 2018
	(thousands)	Environmental Services		Oil Business		Corporate and Eliminations		Consolidated
Revenues
	Service revenues	$	163,428	$	8,777	$	—	$	172,205
	Product revenues	21,798		89,120		—		110,918
Total revenues		$	185,226	$	97,897	$	—	$	283,123
Operating expenses
	Operating costs	134,640		86,062		—		220,702
	Operating depreciation and amortization	4,590		4,188		—		8,778
Profit before corporate selling, general, and administrative expenses		$	45,996	$	7,647	$	—	$	53,643
Selling, general, and administrative expenses						33,185		33,185
Depreciation and amortization from SG&A						2,300		2,300
Total selling, general, and administrative expenses						$	35,485	$	35,485
Other expense - net						983		983
Operating income								17,175
Interest expense – net						742		742
Income before income taxes								$	16,433

Reconciliation of Assets from Segment to Consolidated

Total assets by segment as of September 7, 2019, and December 29, 2018 were as follows:

(thousands)		September 7, 2019		December 29, 2018
Total Assets:
	Environmental Services	$	214,147	$	148,192
	Oil Business	159,552		142,691
	Unallocated Corporate Assets	74,854		56,939
	Total	$	448,553	$	347,822

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Property, Plant, and Equipment (Tables)

8 Months Ended

Sep. 07, 2019

Property, Plant and Equipment [Abstract]

Summary of Property, Plant, and Equipment

Property, plant, and equipment consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Machinery, vehicles, and equipment	$	105,575	$	98,708
Buildings and storage tanks	69,876		69,791
Land	9,663		9,546
Leasehold improvements	5,838		5,701
Construction in progress	19,851		15,405
Assets held for sale	4		4
Total property, plant and equipment	210,807		199,155
Less: accumulated depreciation	64,853		59,168
Property, plant and equipment - net	$	145,954	$	139,987
(thousands)	September 7, 2019		December 29, 2018
Equipment at customers	$	76,469	$	73,075
Less: accumulated depreciation	52,310		49,261
Equipment at customers - net	$	24,159	$	23,814

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Goodwill and Other Intangible Assets - Summary of Intangibles (Details) - USD ($) $ in Thousands	8 Months Ended
	Sep. 07, 2019	Dec. 29, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 38,818	$ 34,874
Accumulated Amortization	22,669	20,193
Net Carrying Amount	16,149	14,681
Customer & supplier relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	25,285	23,686
Accumulated Amortization	13,108	11,445
Net Carrying Amount	$ 12,177	12,241
Weighted average useful life (years)	11 years
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 6,641	5,040
Accumulated Amortization	4,605	4,094
Net Carrying Amount	$ 2,036	946
Weighted average useful life (years)	10 years
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,422	2,937
Accumulated Amortization	3,032	2,904
Net Carrying Amount	$ 390	33
Weighted average useful life (years)	5 years
Patents, formulae, and licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,769	1,769
Accumulated Amortization	753	708
Net Carrying Amount	$ 1,016	1,061
Weighted average useful life (years)	15 years
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,701	1,442
Accumulated Amortization	1,171	1,042
Net Carrying Amount	$ 530	$ 400
Weighted average useful life (years)	7 years

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Debt and Financing Arrangements - Summary of Debt (Details) - USD ($) $ in Thousands	Sep. 07, 2019	Dec. 29, 2018
Debt Disclosure [Abstract]
Principal amount	$ 30,000	$ 30,000
Less: unamortized debt issuance costs	745	954
Debt less unamortized debt issuance costs	$ 29,255	$ 29,046

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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Sep. 07, 2019	Dec. 29, 2018
Lessee, Lease, Description [Line Items]
Remaining lease term	4 years 9 months 18 days
Remaining amount committed	$ 28.0	$ 18.6
Loss contingency accrual	$ 4.4	$ 4.2
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 month
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	11 years
Lease renewal term	5 years

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Subsequent Events (Details) $ in Millions	Oct. 08, 2019 USD ($)
Subsequent event | California Environmental & Litho, Inc.
Subsequent Event [Line Items]
Total consideration	$ 0.6

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Share-based Compensation - Employee Stock Purchase Plan (Details) - $ / shares	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018
Common stock
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Issuance of common stock – ESPP (in shares)	4,789	5,529	14,240	15,170
Employee Stock Purchase Plan | Employee stock
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Shares available employee stock purchase plan (in shares)	115,022		115,022
Weighted average fair value per share ESPP (in dollars per share)			$ 25.72

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Commitments and Contingencies - Future Annual Minimum Lease Payment Commitments (Details) $ in Thousands	Sep. 07, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract]
2019	$ 7,770
2020	22,835
2021	18,681
2022	14,685
2023	10,840
2024 and thereafter	16,440
Total minimum lease payments	91,251
Less: imputed interest	11,703
Lease liability	$ 79,548

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Share-based Compensation - Restricted Stock Compensation/Awards (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	8 Months Ended
	Jun. 10, 2019	Mar. 14, 2018	Feb. 28, 2017	Sep. 07, 2019	Feb. 20, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant					1,500,000
Vested (in shares)				158,372
Mr. Recatto
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing share price as of employment commencement date (in dollars per share)			$ 15.00
Restricted stock | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				1 year
Restricted stock | Members of Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				3 years
Restricted stock | Mr. Recatto
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period (in shares)			500,000
Vesting threshold (in dollars per share)			$ 5.00
Shares vested upon achievement of share price threshold (in shares)			0
Compensation expense				$ 0.6
Unrecognized compensation expense				$ 0.7
Risk-free rate			1.70%
Expected dividend yield			0.00%
Expected volatility rate			41.73%
Vested (in shares)		125,000
Restricted stock | Mr. Recatto | Less than $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)				180 days
Vesting percentage			0.00%	50.00%
Restricted stock | Mr. Recatto | $5 per share increase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%	25.00%	25.00%

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Accounts Receivable - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	8 Months Ended		12 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Dec. 29, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 1,816	$ 1,881	$ 1,881
Provision for bad debts	829	$ 177	628
Accounts written off, net of recoveries	(770)		(693)
Balance at end of period	$ 1,875		$ 1,816

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Business Combinations - Assets and Liabilities Acquired (Details) - USD ($) $ in Thousands	8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Dec. 29, 2018
Business Acquisition [Line Items]
Goodwill	$ 32,744		$ 34,123
Net cash paid	2,573	$ 4,805
All Valley Disposal
Business Acquisition [Line Items]
Accounts receivable	36
Inventory	18
Property, plant, & equipment	252
Equipment at customers	0
Intangible assets	310
Goodwill	384
Total purchase price, net of cash acquired	1,000
Less: working capital adjustment	0
Less: deferred consideration	0
Less: contingent consideration	300
Less: to be placed in escrow	100
Net cash paid	600
GlyEco
Business Acquisition [Line Items]
Accounts receivable	359
Inventory	290
Property, plant, & equipment	746
Equipment at customers	0
Intangible assets	251
Goodwill	0
Total purchase price, net of cash acquired	1,646
Less: working capital adjustment	23
Less: deferred consideration	0
Less: contingent consideration	0
Less: to be placed in escrow	0
Net cash paid	1,623
WSS
Business Acquisition [Line Items]
Accounts receivable	0
Inventory	28
Property, plant, & equipment	154
Equipment at customers	24
Intangible assets	298
Goodwill	0
Total purchase price, net of cash acquired	504
Less: working capital adjustment	14
Less: deferred consideration	0
Less: contingent consideration	90
Less: to be placed in escrow	50
Net cash paid	350
PPI
Business Acquisition [Line Items]
Accounts receivable	909
Inventory	259
Property, plant, & equipment	2,154
Equipment at customers	0
Intangible assets	2,001
Goodwill	406
Total purchase price, net of cash acquired	5,729
Less: working capital adjustment	(62)
Less: deferred consideration	0
Less: contingent consideration	1,341
Less: to be placed in escrow	0
Net cash paid	4,450
HTSC
Business Acquisition [Line Items]
Accounts receivable	40
Inventory	3
Property, plant, & equipment	47
Equipment at customers	104
Intangible assets	100
Goodwill	377
Total purchase price, net of cash acquired	671
Less: working capital adjustment	(9)
Less: deferred consideration	225
Less: contingent consideration	100
Less: to be placed in escrow	0
Net cash paid	$ 355

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Subsequent Events

8 Months Ended

Sep. 07, 2019

Subsequent Events [Abstract]

Subsequent Events

SUBSEQUENT EVENTS

On October 8, 2019, Heritage-Crystal Clean completed the acquisition of certain assets of California Environmental & Litho, Inc., which provided transportation and disposal services for hazardous and non-hazardous waste to printing, photographic, automotive and body shop businesses in the Bay Area, Central Valley & Northern California. The acquisition represents an expansion of HCC’s Environmental Services business in this geographic area while potentially providing new services and products for this market. No facilities were acquired in the transaction and all service employees and activity will be consolidated in existing branch territories. Total consideration for the acquisition was approximately $0.6 million.

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Revenue (Tables)

8 Months Ended

Sep. 07, 2019

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue by Major Lines

The following table disaggregates our revenue by major lines:

	For the Third Quarter Ended,						First Three Quarters Ended,
	September 7, 2019						September 7, 2019
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts cleaning, containerized waste, & related products/services	$	38,458	$	—	$	38,458	$	116,023	$	—	$	116,023
Vacuum Services & Wastewater Treatment	14,507		—		14,507		43,105		—		43,105
Antifreeze Business	5,654		—		5,654		18,451		—		18,451
Field Services	4,284		—		4,284		12,086		—		12,086
Environmental Services - Other	468		—		468		1,228		—		1,228
Re-refinery Product Sales	—		29,059		29,059		—		80,385		80,385
Oil Collection Services & RFO	—		5,772		5,772		—		16,076		16,076
Oil Filter Business	—		970		970		—		3,292		3,292
Revenues from Contracts with Customers	63,371		35,801		99,172		190,893		99,753		290,646
Other Revenue	5,620		48		5,668		14,791		176		14,967
Total Revenues	$	68,991	$	35,849	$	104,840	$	205,684	$	99,929	$	305,613

Contract Assets and Contract Liabilities from Contracts with Customers

The following table provides information about contract assets and contract liabilities from contracts with customers:

(thousands)	September 7, 2019		December 29, 2018
Contract assets	$	108	$	100
Contract liabilities	2,440		266
Contract liabilities - net	$	2,332	$	166

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Business Combinations

8 Months Ended

Sep. 07, 2019

Business Combinations [Abstract]

Business Combinations

BUSINESS COMBINATIONS

On March 25, 2019, the Company completed the acquisition of certain assets of All Valley Disposal, Inc., an environmental services provider based in Fresno, California. Consideration for the acquisition paid at closing was $0.6 million. Contingent upon the achievement of certain business performance metrics, total consideration for the acquisition could reach a maximum of approximately $1.3 million. We are still in the process of completing our valuation, and accordingly our estimates and assumptions are subject to change within the measurement period. The Company is continuing to examine facts and circumstances that existed at the acquisition date and how those affect the estimated fair value of working capital, and the allocation of the estimated purchase price to other tangible and intangible assets. The results of All Valley Disposal are consolidated into the Company’s Environmental Services segment.

On February 1, 2019, the Company purchased the assets of W.S. Supplies, Inc. ("WSS") pursuant to an Asset Purchase Agreement. The Company purchased the assets of WSS to expand the Company’s Environmental Services segment in the mid-west. The purchase price was set at $0.5 million subject to certain adjustments, including a contingent consideration provision, and is preliminarily allocated based on our estimates and assumptions of the approximate fair values of assets acquired on the acquisition date. We are still in the process of completing our valuation, and accordingly our estimates and assumptions are subject to change within the measurement period. The Company is continuing to examine facts and circumstances that existed at the acquisition date and how those affect the estimated fair value of working capital, and the allocation of the estimated purchase price to other tangible and intangible assets. The results of WSS are consolidated into the Company’s Environmental Services segment.

On January 11, 2019, the Company purchased the assets of the consumer division of GlyEco, Inc. ("GlyEco") pursuant to an Asset Purchase Agreement. The Company purchased the assets of GlyEco's consumer division to expand the Company’s antifreeze line of business while expanding geographically. The purchase price was set at $1.6 million subject to certain adjustments, including working capital adjustments, and is preliminarily allocated based on our estimates and assumptions of the approximate fair values of assets acquired on the acquisition date. We are still in the process of completing our valuation, and accordingly our estimates and assumptions are subject to change within the measurement period. The Company is continuing to examine facts and circumstances that existed at the acquisition date and how those affect the estimated fair value of working capital, and the allocation of the estimated purchase price to other tangible and intangible assets. The results of GlyEco are consolidated into the Company’s Environmental Services segment.

On May 3, 2018, the Company purchased the assets of Products Plus, Inc. and AO Holding Company-Kansas City, LLC (collectively "PPI") pursuant to an Asset Purchase Agreement. The Company purchased the assets of PPI to expand the Company’s market share in the collection, recycling, and sales of a full line of antifreeze products. The purchase price was set at $5.9 million subject to certain adjustments, including a working capital adjustment and a contingent consideration provision. During the measurement period, the Company finalized the purchase price allocation of the PPI business combination. Compared to the provisional values reported as of December 29, 2018, the fair values presented in the table below reflect increases to property, plant, & equipment of $0.2 million and other intangible assets of $1.5 million. Compared to the provisional values reported as of December 29, 2018, the finalized fair values presented in the table below reflect decreases to contingent consideration of $0.1 million and goodwill of $1.8 million. Contingent consideration to be paid subsequent to September 7, 2019 is contingent upon several business performance metrics over the three-year period starting with the acquisition date and ending May 3, 2021. The range of the potential contingent consideration, which is to be paid out subsequent to September 7, 2019, is between zero and $1.5 million. Goodwill recognized from the acquisition of PPI represents the excess of the estimated purchase consideration transferred over the estimated fair value of the assets acquired. Factors leading to goodwill being recognized are the Company's expectations of synergies from combining operations of PPI and the Company as well as the value of intangible assets that are not separately recognized, such as assembled workforce. The results of PPI are consolidated into the Company’s Environmental Services segment.

On June 11, 2018, the Company purchased the assets of Kurt Lanse d/b/a Hot Tank Supply Company ("HTSC") pursuant to an Asset Purchase Agreement. The Company purchased the assets of HTSC to expand the Company’s market share in California. The purchase price was set at $0.7 million subject to certain adjustments, including a working capital adjustment and a deferred and contingent consideration provision, and is allocated based on our estimates and assumptions of the approximate fair values of assets acquired on the acquisition date. The Company estimates that contingent consideration to be paid subsequent to September 7, 2019 will be approximately $0.1 million. Goodwill recognized from the acquisition of HTSC represents the excess of the estimated purchase consideration transferred over the estimated fair value of the assets acquired. Factors leading to goodwill being recognized are the Company's expectations of synergies from combining operations of HTSC and the Company as well as the value of intangible assets that are not separately recognized, such as assembled workforce. The results of HTSC are consolidated into the Company’s Environmental Services segment.

The following table summarizes the estimated fair values of the assets acquired, some of which are preliminary, related to each acquisition:

	As of September 7, 2019
(thousands)	All Valley Disposal		GlyEco		WSS		PPI			HTSC
Accounts receivable	$	36	$	359	$	—	$	909		$	40
Inventory	18		290		28		259			3
Property, plant, & equipment	252		746		154		2,154			47
Equipment at customers	—		—		24		—			104
Intangible assets	310		251		298		2,001			100
Goodwill	384		—		—		406			377
Total purchase price, net of cash acquired	$	1,000	$	1,646	$	504	$	5,729		$	671
Less: working capital adjustment	—		23		14		(62		)	(9		)
Less: deferred consideration	—		—		—		—			225
Less: contingent consideration	300		—		90		1,341			100
Less: to be placed in escrow	100		—		50		—			—
Net cash paid	$	600	$	1,623	$	350	$	4,450		$	355

Unaudited Pro-forma Financial Information

Pro forma financial information was not presented as results were immaterial to the Company's consolidated results for the first three quarters ended September 7, 2019.

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Document and Entity Information - shares	8 Months Ended
	Sep. 07, 2019	Oct. 14, 2019
Document and Entity Information [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-Q
Document Period End Date	Sep. 07, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		23,186,061
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Current Reporting Status	Yes
Entity Shell Company	false

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Condensed Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common	Additional Paid–in Capital	Retained Earnings	Total Heritage-Crystal Clean, Inc. Stockholders' Equity	Non-controlling Interest
Beginning balance (in shares) at Dec. 30, 2017		22,891,674
Beginning balance at Dec. 30, 2017	$ 235,926	$ 229	$ 193,640	$ 41,359	$ 235,228	$ 698
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,437			12,224	12,224	213
Distributions	(361)					(361)
Issuance of common stock – ESPP (in shares)		15,170
Issuance of common stock – ESPP	311		311		311
Exercise of stock options (in shares)		14,048
Exercise of stock options	103		103		103
Share-based compensation (in shares)		129,217
Share-based compensation	3,060	$ 2	3,058		3,060
Share repurchases to satisfy tax withholding obligations	(1,030)		(1,030)		(1,030)
Ending balance (in shares) at Sep. 08, 2018		23,050,109
Ending balance at Sep. 08, 2018	250,178	$ 231	196,082	53,315	249,628	550
Beginning balance (in shares) at Jun. 16, 2018		23,042,972
Beginning balance at Jun. 16, 2018	242,450	$ 230	194,774	46,970	241,974	476
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,419			6,345	6,345	74
Issuance of common stock – ESPP (in shares)		5,529
Issuance of common stock – ESPP	107	$ 1	106		107
Exercise of stock options (in shares)		1,608
Exercise of stock options	12		12		12
Share-based compensation	1,190		1,190		1,190
Ending balance (in shares) at Sep. 08, 2018		23,050,109
Ending balance at Sep. 08, 2018	$ 250,178	$ 231	196,082	53,315	249,628	550
Beginning balance (in shares) at Dec. 29, 2018	23,058,584	23,058,584
Beginning balance at Dec. 29, 2018	$ 254,231	$ 231	197,533	55,819	253,583	648
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,792			10,514	10,514	278
Distributions	(400)					(400)
Issuance of common stock – ESPP (in shares)		14,240
Issuance of common stock – ESPP	348		348		348
Exercise of stock options (in shares)		2,760
Exercise of stock options	20		20		20
Share-based compensation (in shares)		109,983
Share-based compensation	2,743	$ 1	2,742		2,743
Share repurchases to satisfy tax withholding obligations	$ (1,427)		(1,427)		(1,427)
Ending balance (in shares) at Sep. 07, 2019	23,185,567	23,185,567
Ending balance at Sep. 07, 2019	$ 266,307	$ 232	199,216	66,333	265,781	526
Beginning balance (in shares) at Jun. 15, 2019		23,180,320
Beginning balance at Jun. 15, 2019	259,109	$ 232	198,074	60,363	258,669	440
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,056			5,970	5,970	86
Issuance of common stock – ESPP (in shares)		4,789
Issuance of common stock – ESPP	120		120		120
Share-based compensation (in shares)		458
Share-based compensation	$ 1,022		1,022		1,022
Ending balance (in shares) at Sep. 07, 2019	23,185,567	23,185,567
Ending balance at Sep. 07, 2019	$ 266,307	$ 232	$ 199,216	$ 66,333	$ 265,781	$ 526

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Share-based Compensation (Tables)

8 Months Ended

Sep. 07, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Restricted Stock Unit Activity

The following table summarizes the restricted stock activity for the first three quarters ended September 7, 2019:

Restricted Stock (Nonvested Shares)	Number of Shares		Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at December 29, 2018	1,013,863		$	18.20
Granted	34,150		26.54
Vested	(158,372	)	16.52
Forfeited	(105,062	)	22.01
Nonvested shares outstanding at September 7, 2019	784,579		$	18.39

The following table shows a summary of restricted share grants and expense resulting from the awards:

			Compensation Expense
(thousands, except share amounts)			First Three Quarters Ended,				Unrecognized Expense as of,
Recipient of Grant	Grant Date	Restricted Shares	September 7, 2019		September 8, 2018		September 7, 2019		December 29, 2018
Members of Management	February, 2017	146,564	$	249	$	318	$	118	$	385
Chief Executive Officer	February, 2017	500,000	569		921		661		1,230
Members of Management	February, 2018	116,958	373		374		804		1,176
Special Incentive Grant	April, 2018	350,000	661		817		3,887		6,633
Board of Directors	May, 2018	13,800	—		197		—		—
Board of Directors	May, 2019	10,590	197		—		88		—
Members of Management	May, 2019	23,560	136		—		500		—

Schedule of Restricted Stock Vesting Percentages

Vesting Table
Increase in Stock Price From the Employment Commencement Date to the Vesting Date	Total Percentage of Restricted Stock Shares to Be Vested
Less than $5 per share increase	—%
$5 per share increase	25%
$10 per share increase	50%
$15 per share increase	75%
$20 or more per share increase	100%

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Accounts Payable (Tables)

8 Months Ended

Sep. 07, 2019

Payables and Accruals [Abstract]

Schedule of Accounts Payable

Accounts payable consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Accounts payable	$	34,663	$	32,471
Accounts payable - related parties	426		159
Total accounts payable	$	35,089	$	32,630

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Income Taxes

8 Months Ended

Sep. 07, 2019

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

 The Company deducted for federal income tax purposes accelerated "bonus" depreciation on the majority of its capital expenditures for assets placed in service in fiscal 2011 through the third quarter of 2019. Therefore, the Company recorded a noncurrent deferred tax liability as to the difference between the book basis and the tax basis of those assets. As of the third quarter of fiscal 2019, the Company's remaining Federal Net Operating Loss ("NOL") was $14.6 million, which will begin to expire in 2031. The unexpired balance on the federal NOL generated in 2011 is $0.5 million as of September 7, 2019. The Company's remaining balance of Federal NOLs recorded during 2012 - 2015 was $14.1 million as of September 7, 2019. There are also state NOLs of varying amounts, dependent on each state’s conformity with bonus depreciation. The remaining deferred tax asset related to the Company's state and federal NOL was a tax effected balance of $3.4 million.

The Company's effective tax rate for the third quarter of fiscal 2019 was 27.1% compared to 26.2% in the third quarter of fiscal 2018. The Company’s effective rate for the first three quarters of fiscal 2019 was 24.0% compared to 24.3% in the first three quarters of fiscal 2018.

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 $2.5 million for uncertain tax positions as of September 7, 2019. The gross unrecognized tax benefits would, if recognized, decrease the Company's effective tax rate.

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Accounts Receivable

8 Months Ended

Sep. 07, 2019

Accounts Receivable, after Allowance for Credit Loss [Abstract]

Accounts Receivable

ACCOUNTS RECEIVABLE

Accounts receivable for the third quarter ended September 7, 2019, and the fiscal year ended December 29, 2018 consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Trade	$	53,992	$	51,118
Less: allowance for doubtful accounts	1,875		1,816
Trade - net	52,117		49,302
Related parties	1,805		1,595
Other	1,731		847
Total accounts receivable - net	$	55,653	$	51,744

The following table provides the changes in the Company’s allowance for doubtful accounts for the three quarters ended September 7, 2019, and the fiscal year ended December 29, 2018:

(thousands)	September 7, 2019			December 29, 2018
Balance at beginning of period	$	1,816		$	1,881
Provision for bad debts	829			628
Accounts written off, net of recoveries	(770		)	(693		)
Balance at end of period	$	1,875		$	1,816

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Accounts Payable

8 Months Ended

Sep. 07, 2019

Payables and Accruals [Abstract]

Accounts Payable

ACCOUNTS PAYABLE

Accounts payable consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Accounts payable	$	34,663	$	32,471
Accounts payable - related parties	426		159
Total accounts payable	$	35,089	$	32,630

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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018
Earnings Per Share [Abstract]
Net income	$ 6,056	$ 6,419	$ 10,792	$ 12,437
Less: income attributable to noncontrolling interest	86	74	278	213
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$ 5,970	$ 6,345	$ 10,514	$ 12,224
Weighted average basic shares outstanding (in shares)	23,185	23,048	23,146	23,013
Dilutive shares for share–based compensation plans (in shares)	236	356	238	286
Weighted average diluted shares outstanding (in shares)	23,421	23,404	23,384	23,299
Net income per share: basic (in dollars per share)	$ 0.26	$ 0.28	$ 0.45	$ 0.53
Net income per share: diluted (in dollars per share)	$ 0.25	$ 0.27	$ 0.45	$ 0.52

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Accounts Payable (Details) - USD ($) $ in Thousands	Sep. 07, 2019	Dec. 29, 2018
Payables and Accruals [Abstract]
Accounts payable	$ 34,663	$ 32,471
Accounts payable - related parties	426	159
Total accounts payable	$ 35,089	$ 32,630

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Segment Information - Operating Segment Results (Details) $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 07, 2019 USD ($)	Sep. 08, 2018 USD ($)	Sep. 07, 2019 USD ($) segment	Sep. 08, 2018 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Revenues
Revenues	$ 104,840	$ 99,674	$ 305,613	$ 283,123
Rental income	5,668		14,967
Operating expenses
Operating costs	80,116	76,045	241,449	220,702
Operating depreciation and amortization	3,184	3,009	9,560	8,778
Profit before corporate selling, general, and administrative expenses	21,540	20,620	54,604	53,643
Selling, general, and administrative expenses	11,241	10,641	34,679	33,185
Depreciation and amortization from SG&A	796	767	2,616	2,300
Total selling, general, and administrative expenses	12,037	11,408	37,295	35,485
Other expense - net	1,020	253	2,477	983
Operating income	8,483	8,959	14,832	17,175
Interest expense – net	181	256	629	742
Income before income taxes	8,302	8,703	14,203	16,433
Corporate and Eliminations
Revenues
Revenues	0	0	0	0
Rental income	0		0
Operating expenses
Operating costs	0	0	0	0
Operating depreciation and amortization	0	0	0	0
Profit before corporate selling, general, and administrative expenses	0	0	0	0
Selling, general, and administrative expenses	11,241	10,641	34,679	33,185
Depreciation and amortization from SG&A	796	767	2,616	2,300
Total selling, general, and administrative expenses	12,037	11,408	37,295	35,485
Other expense - net	1,020	253	2,477	983
Interest expense – net	181	256	629	742
Environmental Services
Revenues
Revenues	68,991		205,684
Rental income	5,620		14,791
Environmental Services | Segments
Revenues
Revenues	68,991	63,307	205,684	185,226
Rental income	5,620		14,791
Operating expenses
Operating costs	49,486	45,460	149,024	134,640
Operating depreciation and amortization	1,743	1,599	5,252	4,590
Profit before corporate selling, general, and administrative expenses	17,762	16,248	51,408	45,996
Oil Business
Revenues
Revenues	35,849		99,929
Rental income	48		176
Oil Business | Segments
Revenues
Revenues	35,849	36,367	99,929	97,897
Rental income	48		176
Operating expenses
Operating costs	30,630	30,585	92,425	86,062
Operating depreciation and amortization	1,441	1,410	4,308	4,188
Profit before corporate selling, general, and administrative expenses	3,778	4,372	3,196	7,647
Service revenues
Revenues
Revenues	57,208	58,054	171,522	172,205
Service revenues | Corporate and Eliminations
Revenues
Revenues	0	0	0	0
Service revenues | Environmental Services | Segments
Revenues
Revenues	54,066	55,473	161,273	163,428
Service revenues | Oil Business | Segments
Revenues
Revenues	3,142	2,581	10,249	8,777
Product revenues
Revenues
Revenues	41,964	41,620	119,124	110,918
Product revenues | Corporate and Eliminations
Revenues
Revenues	0	0	0	0
Product revenues | Environmental Services | Segments
Revenues
Revenues	9,305	7,834	29,620	21,798
Product revenues | Oil Business | Segments
Revenues
Revenues	$ 32,659	$ 33,786	$ 89,504	$ 89,120

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Earnings Per Share (Tables)

8 Months Ended

Sep. 07, 2019

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

The following table reconciles the number of shares outstanding for the third quarters and first three quarters of fiscal 2019 and 2018, 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:

	Third Quarter Ended,				First Three Quarters Ended,
(thousands, except per share amounts)	September 7, 2019		September 8, 2018		September 7, 2019		September 8, 2018
Net income	$	6,056	$	6,419	$	10,792	$	12,437
Less: income attributable to noncontrolling interest	86		74		278		213
Net income attributable to Heritage-Crystal Clean, Inc. available to common stockholders	$	5,970	$	6,345	$	10,514	$	12,224
Weighted average basic shares outstanding	23,185		23,048		23,146		23,013
Dilutive shares for share–based compensation plans	236		356		238		286
Weighted average diluted shares outstanding	23,421		23,404		23,384		23,299
Net income per share: basic	$	0.26	$	0.28	$	0.45	$	0.53
Net income per share: diluted	$	0.25	$	0.27	$	0.45	$	0.52

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Debt and Financing Arrangements (Tables)

8 Months Ended

Sep. 07, 2019

Debt Disclosure [Abstract]

Schedule of Debt

Debt at September 7, 2019 and December 29, 2018 consisted of the following:

(thousands)	September 7, 2019		December 29, 2018
Principal amount	$	30,000	$	30,000
Less: unamortized debt issuance costs	745		954
Debt less unamortized debt issuance costs	$	29,255	$	29,046

Scheduled Maturities of Debt

Scheduled Maturities of Debt

(thousands)
Fiscal Year:	Term Loan
2019	$	—
2020	—
2021	—
2022	30,000
2023	—
Aggregate Maturities	$	30,000

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Revenue

8 Months Ended

Sep. 07, 2019

Revenue from Contract with Customer [Abstract]

Revenue

REVENUE

We account for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. Revenue is recognized when our performance obligations under the terms of a contract with our customers are satisfied. Recognition occurs when the Company transfers control by completing the specified services at the point in time the customer benefits from the services performed or once our products are delivered. The Company measures progress toward complete satisfaction of a performance obligation satisfied over time using a cost-based input method. This method of measuring progress provides a faithful depiction of the transfer of goods or services because the costs incurred are expected to be substantially proportionate to the Company’s satisfaction of the performance obligation. Revenue is measured as the amount of consideration we expect to receive in exchange for completing our performance obligations. Sales tax and other taxes we collect with revenue-producing activities are excluded from revenue. In the case of contracts with multiple performance obligations, the Company allocates the transaction price to each performance obligation based on the relative stand-alone selling prices of the various goods and/or services encompassed by the contract. We do not have any material significant payment terms as payment is generally due within 30 days after the performance obligation has been satisfactorily completed. The Company has elected the practical expedient to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less. In applying the guidance in Topic 606, there were no judgments or estimates made that the Company deems significant.

Accounts Receivable — Net, includes amounts billed and currently due from customers. The amounts due are stated at their net estimated realizable value. 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 and historical losses. Accounts receivable are written off once the Company determines the account to be uncollectible. The Company does not have any off-balance-sheet credit exposure related to its customers.

Contract Balances — Contract assets primarily relate to the Company’s rights to consideration for work completed in relation to its services performed but not billed at the reporting date. Contract liabilities primarily consist of advance payments of performance obligations yet to be fully satisfied in the period reported. Our contract liabilities and contract assets are reported in a net position at the end of each reporting period.

We disaggregate our revenue from contracts with customers by major lines of business for each of our segments, as we believe it best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors.

The following table disaggregates our revenue by major lines:

	For the Third Quarter Ended,						First Three Quarters Ended,
	September 7, 2019						September 7, 2019
Total Net Sales by Major Lines of Business (thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts cleaning, containerized waste, & related products/services	$	38,458	$	—	$	38,458	$	116,023	$	—	$	116,023
Vacuum Services & Wastewater Treatment	14,507		—		14,507		43,105		—		43,105
Antifreeze Business	5,654		—		5,654		18,451		—		18,451
Field Services	4,284		—		4,284		12,086		—		12,086
Environmental Services - Other	468		—		468		1,228		—		1,228
Re-refinery Product Sales	—		29,059		29,059		—		80,385		80,385
Oil Collection Services & RFO	—		5,772		5,772		—		16,076		16,076
Oil Filter Business	—		970		970		—		3,292		3,292
Revenues from Contracts with Customers	63,371		35,801		99,172		190,893		99,753		290,646
Other Revenue	5,620		48		5,668		14,791		176		14,967
Total Revenues	$	68,991	$	35,849	$	104,840	$	205,684	$	99,929	$	305,613

The following table provides information about contract assets and contract liabilities from contracts with customers:

(thousands)	September 7, 2019		December 29, 2018
Contract assets	$	108	$	100
Contract liabilities	2,440		266
Contract liabilities - net	$	2,332	$	166

During the quarter ended September 7, 2019, the Company recognized no revenue that was included in the contract liabilities balance as of December 29, 2018. During the first three quarters ended September 7, 2019, the Company recognized $0.3 million of revenue that was included in the contract liabilities balance as of December 29, 2018. As a result of having adopted ASC 842 on December 30, 2018, the Company recognized within Contract liabilities - net approximately $2.2 million of deferred rental income. The Company has no assets recognized from costs to obtain or fulfill a contract with a customer. We do not disclose the value of unsatisfied performance obligations for contracts with an original expected length of one year or less.

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Goodwill and Other Intangible Assets

8 Months Ended

Sep. 07, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

GOODWILL AND OTHER INTANGIBLE ASSETS

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 an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company's determination of fair value requires certain assumptions and estimates, such as margin expectations, market conditions, growth expectations, expected changes in working capital, etc., regarding expected future profitability and expected future cash flows. The Company tests goodwill for impairment at each of its two reporting units, Environmental Services and Oil Business.

The following table shows changes to our goodwill balances by segment from December 29, 2018 to September 7, 2019:

(thousands)	Oil Business			Environmental Services			Total
Goodwill at December 29, 2018
Gross carrying amount	$	3,952		$	34,123		$	38,075
Accumulated impairment loss	(3,952		)	—			(3,952		)
Net book value at December 29, 2018	$	—		$	34,123		$	34,123
Acquisitions	—			384			—
Measurement period adjustments	—			(1,763		)	—
Goodwill at September 7, 2019
Gross carrying amount	3,952			32,744			36,696
Accumulated impairment loss	(3,952		)	—			(3,952		)
Net book value at September 7, 2019	$	—		$	32,744		$	32,744

The following is a summary of software and other intangible assets:

	September 7, 2019						December 29, 2018
(thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer & supplier relationships	$	25,285	$	13,108	$	12,177	$	23,686	$	11,445	$	12,241
Software	6,641		4,605		2,036		5,040		4,094		946
Non-compete agreements	3,422		3,032		390		2,937		2,904		33
Patents, formulae, and licenses	1,769		753		1,016		1,769		708		1,061
Other	1,701		1,171		530		1,442		1,042		400
Total software and intangible assets - net	$	38,818	$	22,669	$	16,149	$	34,874	$	20,193	$	14,681

Amortization expense was $0.7 million for both third quarters ended September 7, 2019, and September 8, 2018. Amortization expense was $2.5 million for the first three quarters ended September 7, 2019, and $2.2 million for the first three quarters ended September 8, 2018.

The weighted average useful lives of software and other intangibles are as follows:

	Weighted average useful life (years)
Patents, formulae, & licenses	15
Customer and supplier relationships	11
Software	10
Non-compete agreements	5
Other intangibles	7

The estimated amortization expense for the remainder of fiscal 2019 and each of the five succeeding fiscal years is as follows:

(millions)
Fiscal Year	Amortization Expense
2019	$1.0
2020	3.1
2021	2.9
2022	2.7
2023	2.1
2024	0.6

The preceding expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to additional intangible asset acquisitions, the finalization of the fair value of intangible assets that have been acquired from business combinations, disposal of intangible assets, accelerated amortization of intangible assets, and other events.

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Commitments and Contingencies

8 Months Ended

Sep. 07, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

LEASES

Lessee

The Company leases buildings and property, railcars, machinery and equipment, and various types of vehicles for use in our operations. Each arrangement is evaluated individually to determine if the arrangement is or contains a lease at inception. The Company has lease agreements with lease and non-lease components and we have elected to not separate lease and non-lease components for all classes of underlying assets. In addition, our lease agreements do not contain any material residual guarantees or restrictive covenants.

Leases may include variable lease payments for common area maintenance, real estate taxes, and truck lease mileage. No leases are tied to a market index rate or CPI. Variable lease payments are not included in the initial measurement of the right-of-use assets or lease liabilities, and are recorded as lease expense in the period incurred. Options to extend or terminate a lease are included in the lease term when it is reasonably certain that we will exercise that option. We have elected not to record leases with an initial term of 12 months or less on the balance sheet and instead recognize those lease payments on a straight-line basis over the lease term. Leases with initial terms in excess of 12 months are recorded as either operating or financing leases in our Consolidated Balance Sheet.

Right-of-use assets represent the Company's right to use an underlying asset during the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Our lease right-of-use assets are measured at the initial measurement of the lease liability, adjusted for any lease payments made prior to the lease commencement date, less any lease incentives received and other initial direct costs incurred. Our lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use an incremental borrowing rate based on the information available at commencement date, including lease term, in determining the present value of future payments.

Our leases have remaining terms ranging from less than one month to 11 years and may include options to extend or terminate the lease when it is reasonably certain that the option will be exercised. Lease expense is recognized on a straight-line basis over the lease term. Our finance leases include a fleet of mobile equipment.

The components of lease expense were as follows:

(thousands)	For the Third Quarter Ended, September 7, 2019		First Three Quarters Ended, September 7, 2019
Finance lease cost:
Amortization of right-of-use Assets	$	25	$	25
Interest on lease liabilities	6		6
Total finance lease cost	$	31	$	31
Operating lease cost	$	5,914	$	18,366
Short-term lease cost	1,579		3,650
Variable lease cost	827		2,794
Total lease cost	$	8,320	$	24,810
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	$	4	$	4
Operating cash flows from operating leases	$	6,554	$	19,805
Financing cash flows from financing leases	$	13	$	13
Right-of-use assets obtained in exchange for new finance lease liabilities	$	1,487	$	1,487
Right-of-use assets obtained in exchange for new operating lease liabilities	$	12,099	$	92,226
Weighted-average remaining lease term (years)
Finance leases			6.90
Operating leases			4.80
Weighted-average discount rate
Finance leases			3.4		%
Operating leases			5.7		%

Future annual minimum lease payment commitments as of September 7, 2019 were as follows:

(thousands)
2019	$	7,770
2020	22,835
2021	18,681
2022	14,685
2023	10,840
2024 and thereafter	16,440
Total minimum lease payments	$	91,251
Less: imputed interest	11,703
Lease liability	$	79,548

As disclosed in our 2018 Annual Report on Form 10-K, and under the previous lease accounting standard 840, future minimum lease payments due under noncancelable operating lease agreements as of December 29, 2018 were as follows:

(thousands)
2019	$	22,226
2020	16,095
2021	12,458
2022	9,247
2023	6,020
2024 and thereafter	5,786
Total minimum lease payments	$	71,832

Lessor

The Company is a lessor of portions of a building and property, railcars, and equipment such as embedded leases of parts cleaning machines. Each of the Company’s leases is classified as an operating lease, and the vast majority are short-term leases. Variable lease payments include real and personal property taxes, which are based on the lessee’s pro rata portion of such amounts, and excess mileage charges which are computed as the actual miles traveled in a calendar year minus the maximum average mileage allowance as specified per the contract. Options to extend the lease beyond the original terms range from day-to-day renewals to increments of five-year extensions. Options to terminate the lease range from immediate termination upon return of the asset to various written notification periods following a minimum lease term. Options for a lessee to purchase the underlying asset are not contractually specified but may be negotiated on a case-by-case basis. Significant judgments made in determining whether a contract contains a lease include assessments as to whether or not the contract conveys the right to direct the use of an identified asset. Significant judgments made in allocating consideration between lease and non-lease components include techniques applied in estimating the relative stand-alone selling prices of the lease and non-lease components of the contract in cases where a stand-alone selling price is not directly observable. As of September 7, 2019, the Company is party to a contract under which it leases railcars to the related party Calumet Specialty Products Partners, L.P. No leased assets are covered by residual value guarantees. The Company manages the risk associated with the residual value of leased assets through such means as performing periodic maintenance and upkeep activities and the inclusion of contractual terms that hold the lessee responsible for damage incurred to leased assets. Contained in Note 7, “Property, plant, and equipment,” are disclosures concerning the Company’s underlying assets under operating leases. The Company has made an accounting policy election to exclude from the consideration in the contract and from variable payments not included in the consideration in the contract all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific lease revenue-producing transaction and collected by the lessor from a lessee.

The Company recognizes rental income on a straight-line basis for that portion of the consideration allocated to the embedded lease component of certain of our parts cleaning contracts. We also recognize rental income on certain subleases of railcars and portions of a building and property.

Rental income for the third quarter and first three quarters ended September 7, 2019 was as follows:

	Third Quarter Ended,						First Three Quarters Ended,
	September 7, 2019						September 7, 2019
(thousands)	Environmental Services		Oil Business		Total		Environmental Services		Oil Business		Total
Parts Cleaning	$	5,620	$	—	$	5,620	$	14,791	$	—	$	14,791
Railcars	—		35		35		—		147		147
Property	—		13		13		—		29		29
Total rental income	$	5,620	$	48	$	5,668	$	14,791	$	176	$	14,967

Purchase Obligations

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 has purchase obligations in the form of open purchase orders of $28.0 million as of September 7, 2019, and $18.6 million as of December 29, 2018, 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. The Company may also be subject to tax audits in a variety of jurisdictions. 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 September 7, 2019 and December 29, 2018, the Company had accrued $4.4 million and $4.2 million related to loss contingencies and other contingent liabilities, respectively.

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Other Expense - Net (Details) - USD ($) $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018
Restructuring Cost and Reserve [Line Items]
Other expense - net	$ 1,020	$ 253	$ 2,477	$ 983
Facility closing
Restructuring Cost and Reserve [Line Items]
Other expense - net			$ 1,500	$ 700

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Goodwill and Other Intangibles Assets - Schedule of Expected Amortization Expense (Details) $ in Millions	Sep. 07, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 1.0
2020	3.1
2021	2.9
2022	2.7
2023	2.1
2024	$ 0.6

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Debt and Financing Arrangements - Scheduled Maturities of Debt (Details) - USD ($) $ in Thousands	Sep. 07, 2019	Dec. 29, 2018
Debt Disclosure [Abstract]
2019	$ 0
2020	0
2021	0
2022	30,000
2023	0
Aggregate Maturities	$ 30,000	$ 30,000

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Commitments and Contingencies - Components of Lease Expense (Details) $ in Thousands	3 Months Ended	8 Months Ended
	Sep. 07, 2019 USD ($)	Sep. 07, 2019 USD ($)
Lessee Finance Lease, Cost [Abstract]
Amortization of right-of-use Assets	$ 25	$ 25
Interest on lease liabilities	6	6
Total finance lease cost	31	31
Operating lease cost	5,914	18,366
Short-term lease cost	1,579	3,650
Variable lease cost	827	2,794
Total lease cost	8,320	24,810
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from financing leases	4	4
Operating cash flows from operating leases	6,554	19,805
Financing cash flows from financing leases	13	13
Right-of-use assets obtained in exchange for new finance lease liabilities	1,487	1,487
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 12,099	$ 92,226
Weighted-average remaining lease term (years)
Finance leases	6 years 10 months 24 days	6 years 10 months 24 days
Operating leases	4 years 9 months 18 days	4 years 9 months 18 days
Weighted-average discount rate
Finance leases	3.40%	3.40%
Operating leases	5.70%	5.70%

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 14.6		$ 14.6
Deferred tax asset, state and federal NOL	$ 3.4		$ 3.4
Effective tax rate	27.10%	26.20%	24.00%	24.30%
Reserve balance	$ 2.5		$ 2.5
2011
Operating Loss Carryforwards [Line Items]
Net operating loss	0.5		0.5
2012 - 2015
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 14.1		$ 14.1

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Share-based Compensation - Nonvested Restricted Stock (Details)	8 Months Ended
	Sep. 07, 2019 $ / shares shares
Number of Shares
Nonvested shares outstanding at Beginning of Period (in shares) | shares	1,013,863
Granted (in shares) | shares	34,150
Vested (in shares) | shares	(158,372)
Forfeited (in shares) | shares	(105,062)
Nonvested shares outstanding at End of Period (in shares) | shares	784,579
Weighted Average Grant-Date Fair Value Per Share
Nonvested shares outstanding at Beginning of Period (in dollars per share) | $ / shares	$ 18.20
Granted (in dollars per share) | $ / shares	26.54
Vested (in dollars per share) | $ / shares	16.52
Forfeited (in dollars per share) | $ / shares	22.01
Nonvested shares outstanding at End of Period (in dollars per share) | $ / shares	$ 18.39

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Inventory (Details) - USD ($)	8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Dec. 29, 2018
Inventory Disclosure [Abstract]
Solvents and solutions	$ 8,340,000		$ 8,216,000
Used oil and processed oil	7,782,000		12,124,000
Machines	5,517,000		5,334,000
Drums and supplies	4,512,000		5,231,000
Other	2,510,000		2,378,000
Total inventory	28,661,000		33,283,000
Less: machine refurbishing reserve	402,000		224,000
Total inventory - net	28,259,000		$ 33,059,000
Inventory write-down	$ 0	$ 0

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Revenue - Schedule of Disaggregation of Revenue by Major Lines (Details) - USD ($) $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018
Revenue from Contract with Customer [Abstract]
Performance obligation timing			We do not have any material significant payment terms as payment is generally due within 30 days after the performance obligation has been satisfactorily completed. The Company has elected the practical expedient to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less.
Disaggregation of Revenue [Line Items]
Revenues	$ 99,172		$ 290,646
Other Revenue	5,668		14,967
Total revenues	104,840	$ 99,674	305,613	$ 283,123
Parts cleaning, containerized waste, & related products/services
Disaggregation of Revenue [Line Items]
Revenues	38,458		116,023
Vacuum Services & Wastewater Treatment
Disaggregation of Revenue [Line Items]
Revenues	14,507		43,105
Antifreeze Business
Disaggregation of Revenue [Line Items]
Revenues	5,654		18,451
Field Services
Disaggregation of Revenue [Line Items]
Revenues	4,284		12,086
Environmental Services - Other
Disaggregation of Revenue [Line Items]
Revenues	468		1,228
Re-refinery Product Sales
Disaggregation of Revenue [Line Items]
Revenues	29,059		80,385
Oil Collection Services & RFO
Disaggregation of Revenue [Line Items]
Revenues	5,772		16,076
Oil Filter Business
Disaggregation of Revenue [Line Items]
Revenues	970		3,292
Environmental Services
Disaggregation of Revenue [Line Items]
Revenues	63,371		190,893
Other Revenue	5,620		14,791
Total revenues	68,991		205,684
Environmental Services | Parts cleaning, containerized waste, & related products/services
Disaggregation of Revenue [Line Items]
Revenues	38,458		116,023
Environmental Services | Vacuum Services & Wastewater Treatment
Disaggregation of Revenue [Line Items]
Revenues	14,507		43,105
Environmental Services | Antifreeze Business
Disaggregation of Revenue [Line Items]
Revenues	5,654		18,451
Environmental Services | Field Services
Disaggregation of Revenue [Line Items]
Revenues	4,284		12,086
Environmental Services | Environmental Services - Other
Disaggregation of Revenue [Line Items]
Revenues	468		1,228
Environmental Services | Re-refinery Product Sales
Disaggregation of Revenue [Line Items]
Revenues	0		0
Environmental Services | Oil Collection Services & RFO
Disaggregation of Revenue [Line Items]
Revenues	0		0
Environmental Services | Oil Filter Business
Disaggregation of Revenue [Line Items]
Revenues	0		0
Oil Business
Disaggregation of Revenue [Line Items]
Revenues	35,801		99,753
Other Revenue	48		176
Total revenues	35,849		99,929
Oil Business | Parts cleaning, containerized waste, & related products/services
Disaggregation of Revenue [Line Items]
Revenues	0		0
Oil Business | Vacuum Services & Wastewater Treatment
Disaggregation of Revenue [Line Items]
Revenues	0		0
Oil Business | Antifreeze Business
Disaggregation of Revenue [Line Items]
Revenues	0		0
Oil Business | Field Services
Disaggregation of Revenue [Line Items]
Revenues	0		0
Oil Business | Environmental Services - Other
Disaggregation of Revenue [Line Items]
Revenues	0		0
Oil Business | Re-refinery Product Sales
Disaggregation of Revenue [Line Items]
Revenues	29,059		80,385
Oil Business | Oil Collection Services & RFO
Disaggregation of Revenue [Line Items]
Revenues	5,772		16,076
Oil Business | Oil Filter Business
Disaggregation of Revenue [Line Items]
Revenues	$ 970		$ 3,292

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Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		8 Months Ended
	Sep. 07, 2019	Sep. 08, 2018	Sep. 07, 2019	Sep. 08, 2018
Revenues
Rental income	$ 5,668		$ 14,967
Total revenues	104,840	$ 99,674	305,613	$ 283,123
Operating expenses
Operating costs	80,116	76,045	241,449	220,702
Selling, general, and administrative expenses	11,241	10,641	34,679	33,185
Depreciation and amortization	3,980	3,776	12,176	11,078
Other expense - net	1,020	253	2,477	983
Operating income	8,483	8,959	14,832	17,175
Interest expense – net	181	256	629	742
Income before income taxes	8,302	8,703	14,203	16,433
Provision for income taxes	2,246	2,284	3,411	3,996
Net income	6,056	6,419	10,792	12,437
Income attributable to noncontrolling interest	86	74	278	213
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$ 5,970	$ 6,345	$ 10,514	$ 12,224
Net income per share: basic (in dollars per share)	$ 0.26	$ 0.28	$ 0.45	$ 0.53
Net income per share: diluted (in dollars per share)	$ 0.25	$ 0.27	$ 0.45	$ 0.52
Number of weighted average shares outstanding: basic (in shares)	23,185	23,048	23,146	23,013
Number of weighted average shares outstanding: diluted (in shares)	23,421	23,404	23,384	23,299
Service revenues
Revenues
Total revenues	$ 57,208	$ 58,054	$ 171,522	$ 172,205
Product revenues
Revenues
Total revenues	$ 41,964	$ 41,620	$ 119,124	$ 110,918

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Other Expense - Net

8 Months Ended

Sep. 07, 2019

Other Income and Expenses [Abstract]

Other Expense - Net

OTHER EXPENSE - NET

Other expense - net was $2.5 million of expense for the first three quarters of fiscal 2019 primarily relating to $1.5 million of site closure costs for a facility in Wilmington, DE. Other expense of $1.0 million for the first three quarters of fiscal 2018 primarily consists of $0.7 million of site closure costs.

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Business Combinations (Tables)

8 Months Ended

Sep. 07, 2019

Business Combinations [Abstract]

Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed

The following table summarizes the estimated fair values of the assets acquired, some of which are preliminary, related to each acquisition:

	As of September 7, 2019
(thousands)	All Valley Disposal		GlyEco		WSS		PPI			HTSC
Accounts receivable	$	36	$	359	$	—	$	909		$	40
Inventory	18		290		28		259			3
Property, plant, & equipment	252		746		154		2,154			47
Equipment at customers	—		—		24		—			104
Intangible assets	310		251		298		2,001			100
Goodwill	384		—		—		406			377
Total purchase price, net of cash acquired	$	1,000	$	1,646	$	504	$	5,729		$	671
Less: working capital adjustment	—		23		14		(62		)	(9		)
Less: deferred consideration	—		—		—		—			225
Less: contingent consideration	300		—		90		1,341			100
Less: to be placed in escrow	100		—		50		—			—
Net cash paid	$	600	$	1,623	$	350	$	4,450		$	355

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Summary of Significant Accounting Policies

8 Months Ended

Sep. 07, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The Company's significant accounting policies are described in Note 2, "Summary of Significant Accounting Policies," in the Company's Annual Report on Form 10-K for the fiscal year ended December 29, 2018. There have been no material changes in these policies or their application during the first three quarters of fiscal 2019 with the exception of our accounting for leases. See footnote 12 — Commitments and Contingencies for more information.

Recently Issued Accounting Pronouncements
Standard	Issuance Date	Description	Our Effective Date	Effect on the Financial Statements
ASU 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.”	June 2016	This update modifies the impairment model for most financial assets and certain other instruments. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities will be required to utilize a new forward-looking “expected loss” methodology that generally will result in the earlier recognition of allowance for losses.	December 29, 2019	The Company is evaluating the impact this new standard would have on our consolidated financial statements.

Recently Issued Accounting Standards Adopted
Standard	Issuance Date	Description	Effective Date	Effect on the Financial Statements
ASU 2016-02 Leases (Topic 842), and subsequent updates	February 2016	This update was issued to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. Early application of the amendments in this update is permitted for all entities.	December 30, 2018	The Company adopted the new leasing standard ASC 842 "Leases" on December 30, 2018. ASU 2016-02 provides for a modified retrospective transition  approach requiring lessees to recognize and measure leases on the balance sheet at the beginning of either the earliest period presented or as of the beginning of the period of adoption. The Company elected to apply ASU 2016-02 as of the beginning of the period of adoption (December 30, 2018) and will not restate comparative periods. The adoption resulted in the recognition of $63.3 million of right of use assets and $63.3 million of lease liabilities. The Company recognized approximately $2.2 million of deferred rental income from certain embedded leases during the first quarter of 2019.

Effective December 30, 2018, the Company adopted the requirements of Topic 842. The cumulative effects of the changes made to our Statement of Income and Balance Sheet are as follows:

	For the Third Quarter Ended, September 7, 2019							For the First Three Quarters Ended, September 7, 2019
	As Reported		Balances Without Adoption of Topic 842		Effect of Change			As Reported		Balances Without Adoption of Topic 842		Effect of Change
(thousands, except per share amounts)					Higher/(Lower)							Higher/(Lower)
Statement of Income
Service revenues	$	57,208	$	62,843	$	(5,635	)	$	171,522	$	188,614	$	(17,092	)
Rental income	5,668		—		5,668			14,967		—		14,967
Total revenues	104,840		104,807		33			305,613		307,738		(2,125		)
Operating income	8,483		8,450		33			14,832		16,957		(2,125		)
Income before income taxes	8,302		8,269		33			14,203		16,328		(2,125		)
Provision for income taxes	2,246		2,237		9			3,411		3,921		(510		)
Net income	6,056		6,032		24			10,792		12,407		(1,615		)
Net income attributable to Heritage-Crystal Clean, Inc. common stockholders	$	5,970	$	5,946	$	24		$	10,514	$	12,129	$	(1,615	)
Net income per share: basic	$	0.26	$	0.26	$	—		$	0.45	$	0.52	$	(0.07	)
Net income per share: diluted	$	0.25	$	0.25	$	—		$	0.45	$	0.52	$	(0.07	)

	September 7, 2019
	As Reported		Balances Without Adoption of Topic 842		Effect of Change
(thousands)					Higher/(Lower)
Balance Sheet
Right of use assets	$	79,498	$	—	$	79,498
Total assets	448,553		369,055		79,498
Current portion of lease liabilities	20,257		—		20,257
Contract liabilities - net	2,332		207		2,125
Other current liabilities	4,989		5,039		(50		)
Total current liabilities	75,830		53,498		22,332
Lease liabilities, net of current portion	59,291		—		59,291
Deferred income taxes	17,870		18,380		(510		)
Total liabilities	182,246		101,133		81,113
Retained earnings	66,333		67,948		(1,615		)
Heritage-Crystal Clean, Inc. stockholders' equity	265,781		267,396		(1,615		)
Total equity	266,307		267,922		(1,615		)
Total liabilities and stockholders' equity	$	448,553	$	369,055	$	79,498