Note 1 – Basis of Presentation

Enservco Corporation (“Enservco”) through its wholly-owned subsidiaries (collectively referred to as the “Company”, “we” or “us”) provides various services to the domestic onshore oil and natural gas industry. These services include frac water heating, hot oiling and acidizing (well enhancement services); water transfer and water treatment services (water transfer services); and water hauling, fluid disposal, frac tank rental (water hauling services); and dirt hauling and other general oilfield services (construction services).

The accompanying unaudited condensed consolidated financial statements have been derived from the accounting records of Enservco Corporation, Heat Waves Hot Oil Service LLC (“Heat Waves”), Dillco Fluid Service, Inc. (“Dillco”), Heat Waves Water Management LLC (“HWWM”), HE Services LLC (“HES”), and Real GC LLC (“Real GC”) (collectively, the “Company”) as of SeptemberJune 30, 2017 2018 and December 31, 2016 2017 and the results of operations for the three and ninesix months ended SeptemberJune 30, 2017 2018 and 2016.2017.

The below table provides an overview of the Company’s current ownership hierarchy:

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles for interim financial information and with the instructions to Form 10-Q10-Q and Article 8 of Regulation S-X.S-X. Accordingly, they do not include all of the disclosures required by generally accepted accounting principles in the United States for complete financial statements. In the opinion of management, all of the normal and recurring adjustments necessary to fairly present the interim financial information set forth herein have been included. The results of operations for interim periods are not necessarily indicative of the operating results of a full year or of future years.

The accompanying unaudited condensed consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and follow the same accounting policies and methods of their application as the most recent annual financial statements. These interim financial statements should be read in conjunction with the financial statements and related footnotes included in the Annual Report on Form 10-K10-K of Enservco Corporation for the year ended December 31, 2016. 2017. All inter-company balances and transactions have been eliminated in the accompanying condensed consolidated financial statements.

Note 2– Liquidity and Management's Plans

As described in more detail in Note 5, Revolving Credit Facilities on August 10, 2017, we entered into a Loan and Security Agreement (the "2017 Credit Agreement") with East West Bank, a California banking corporation ("East West Bank"), which provides for a three-year $30 million senior secured revolving credit facility (the “New Credit Facility”). On August 10, 2017 we repaid all amounts due under our prior credit facility with PNC Bank (the "Prior Credit Facility") using proceeds from New Credit Facility. Upon entering the 2017 Credit Agreement and repaying all amounts due pursuant to the 2014 Credit Agreement, we had availability of approximately $4.7 million under the New Credit Facility. 

As of September 30, 2017, our available liquidity was approximately $3.2 million, which was substantially comprised of $2.7 million of availability under our credit facility (the "New Credit Facility") provided pursuant to the Loan and Security Agreement with East West Bank ("East West Bank"), (the “2017 Credit Agreement”) and approximately $480,000 in cash. On August 10, 2017, we repaid approximately $21.5 million which we had borrowed pursuant to a previous credit facility (the "Prior Credit Facility") provided pursuant to the Amended and Restated Revolving Credit and Security Agreement with PNC Bank, N.A. (the “2014 Credit Agreement”) using proceeds from the New Credit Facility. During the nine months ended September 30, 2017, the company received proceeds of approximately $23.5 million under the New Credit Facility. 

As of September 30, 2017, we were in violation of a loan covenant under the New Credit Facility that requires our Fixed Charge Coverage Ratio (as defined in the 2017 Credit Agreement) (“FCCR”) to be not less than 1.10 to 1.00 at the end of each month, with a build up beginning with January 1, 2017. Our FCCR as of September 30, 2017, was 0.62, calculated in accordance with the 2017 Credit Agreement, and constituted an Event of Default, as defined in the 2017 Credit Agreement. East West Bank may, at its election, declare all our obligations under the New Credit Facility immediately due and payable and cease advancing money or extending credit to us, among other remedies. We are currently in negotiations with East West Bank regarding a waiver of the testing of this covenant until December 31, 2017 through an amendment to the 2017 Credit Agreement, which would remedy the covenant violation. However, as of November 14, 2017, we had not finalized an amendment and we therefore classified borrowings under the New Credit Facility ($23,543,802) as a current liability in the accompanying condensed consolidated balance sheet as of September 30, 2017, resulting in us having a significant working capital deficit of approximately $21.1 million. We cannot provide assurance that we will reach an agreement regarding the waiver, however, we believe it is probable that such an agreement will be reached. If East West Bank exercises its option to declare our borrowings under the 2017 Credit Agreement immediately due and payable, or cease advancing money or extending credit to us, our ability to continue as a going concern will be negatively affected.

Note 3 - Summary of Significant Accounting Policies

Cash and Cash Equivalents

The Company considers all highly liquid instruments purchased with an original maturity of three months or less to be cash equivalents. The Company continually monitors its positions with, and the credit quality of, the financial institutions with which it invests. Enservco maintains its excess cash in various financial institutions, where deposits may exceed federally insured amounts at times.

Accounts Receivable

Accounts Receivable 

Accounts receivable are stated at the amounts billed to customers, net of an allowance for uncollectible accounts. The Company provides an allowance for uncollectableuncollectible accounts based on a review of outstanding receivables, historical collection information and existing economic conditions. The allowance for uncollectible amounts is continually reviewed and adjusted to maintain the allowance at a level considered adequate to cover future losses. The allowance is management's best estimate of uncollectible amounts and is determined based on historical collection experience related to accounts receivable coupled with a review of the current status of existing receivables. The losses ultimately incurred could differ materially in the near term from the amounts estimated in determining the allowance. As of SeptemberJune 30, 2017 2018, and December 31, 2016, 2017, the Company had an allowance for doubtful accounts of approximately $127,000 and $34,000,approximately $65,000 and $70,000, respectively. For the three and nine months ended SeptemberJune 30, 2017,2018, the Company recorded less than $1,000 of bad debt expense. For the six months ended June 30, 2018, the Company recorded bad debt expense (net of recoveries) of approximately $44,000 and $93,000, respectively.$33,000. For the three and ninesix months ended SeptemberJune 30, 2016,2017, the Company recorded bad debt expense (net of recoveries) of approximately $59,000$20,000 and $146,000,$49,000, respectively.

Inventories

Inventory consists primarily of propane, diesel fuel and chemicals that are used in the servicing of oil wells and is carried at the lower of cost or marketnet realizable value in accordance with the first in, first out method (FIFO). The Company periodically reviews the value of items in inventory and provides write-downs or write-offs, of inventory based on its assessment of market conditions. Write-downs and write-offs are charged to cost of goods sold. For the three and ninesix months ended SeptemberJune 30, 2017 2018 and 2016, 2017,no amounts were expensed for write-downs and write-offs.

Property and Equipment

Property and equipment consists of (1)(i) trucks, trailers and pickups; (2)(ii) water transfer pumps, pipe, lay flat hose, trailers, and other support equipment; (3)(iii) real property which includes land and buildings used for office and shop facilities and wells used for the disposal of water; and (4)(iv) other equipment such as tools used for maintaining and repairing vehicles, office furniture and fixtures, and computer equipment. Property and equipment is stated at cost less accumulated depreciation. The Company capitalizes interest on certain qualifying assets that are undergoing activities to prepare them for their intended use. Interest costs incurred during the fabrication period are capitalized and amortized over the life of the assets. The Company charges repairs and maintenance against income when incurred and capitalizes renewals and betterments, which extend the remaining useful life, expand the capacity or efficiency of the assets. Depreciation is recorded on a straight-line basis over estimated useful lives of 5 to 30 years.

Any difference between net book value of the property and equipment and the proceeds of an assets’ sale or settlement of an insurance claim is recorded as a gain or loss in the Company’s earnings.

Leases

The Company conducts a major part of its operations from leased facilities. Each of these leases is accounted for as an operating lease. Normally, the Company records rental expense on its operating leases over the lease term as it becomes payable. If rental payments are not made on a straight-line basis, per terms of the agreement, the Company records a deferred rent expense and recognizes the rental expense on a straight-line basis throughout the lease term. The majority of the Company’s facility leases contain renewal clauses and expire through JuneAugust 2022. In most cases, management expects that in the normal course of business, leases will be renewed or replaced by other leases. The Company amortizes leasehold improvements over the shorter of the life of the lease or the life of the improvements. As of June 30, 2018, and December 31, 2017, the Company had a deferred rent liability of approximately $90,000 and $96,000, respectively.

The Company has leased equipment in the normal course of business, which are recorded as operating leases. The Company recorded rental expense on equipment under operating leases over the lease term as it becomes payable; there were no rent escalation terms associated with these equipment leases. The equipment leases contain purchase options that allow the Company to purchase the leased equipment at the end of the lease term, based on the market price of the equipment at the time of the lease termination. There are no significant equipment leases outstanding as of SeptemberJune 30, 2017.2018.

Long-Lived Assets

The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recovered. The Company reviews both qualitative and quantitative aspects of the business during the analysis of impairment. During the quantitative review, the Company reviews the undiscounted future cash flows in its assessment of whether or not long-lived assets have been impaired. No impairments were recorded during the three or ninesix months ended SeptemberJune 30, 2017 2018 and 2016.2017.

Revenue Recognition

As described below, we adopted Accounting Standards Update 2014-09, Revenue - Revenue from Contracts with Customers, Accounting Standards Codification ("ASC") Topic 606, beginning January 1, 2018, using the modified retrospective approach, which we have applied to contracts within the scope of the standard. There was no material impact on the Company's condensed consolidated financial statements from adoption of this new standard. The Company recognizesevaluates revenue when evidencewe can identify the contract with the customer, the performance obligations in the contract, the transaction price, and we are certain that the performance obligations have been met. Revenue is recognized when the service has been provided to the customer, which includes estimated amounts for services rendered but not invoiced at the end of an arrangement exists,each accounting period. The vast majority of the feeCompany's services and product offerings are short-term in nature.  The time between invoicing and when payment is fixed or determinable, services are provided, and collectiondue under these arrangements is reasonably assured.generally 30 to 60 days.

Revenue is not generated from contractual arrangements that include multiple performance obligations.  

Revenue is recognized for certain projects that take more than one day projects over time based on the number of days during the reporting period and the agreed upon price as work progresses on each project. Revenue that has been earned but not yet invoiced at June 30, 2018 and December 31, 2017 was approximately $15,000 and $1.7 million, respectively. Such amounts are included within Accounts receivable, net in the Condensed Consolidated Balance Sheets.

Disaggregation of revenue

See Note 11 - Segment Reporting for disaggregation of revenue.

Earnings (Loss) Per Share

Earnings (loss) per shareCommon Share - Basic is computed by dividing net income (loss) by the weighted average number of common shares outstanding for the period. Earnings per Common Share - Diluted earnings per share is calculated by dividing net income (loss) by the diluted weighted average number of common shares. The diluted weighted average number of common shares is computed using the treasury stock method for common stock that may be issued for outstanding stock options and warrants.

As of SeptemberJune 30, 2017 2018, and 2016,2017, there were outstanding stock options and warrants to acquire an aggregate of 6,850,6702,662,766 and 4,490,6695,749,433 shares of Company common stock, respectively, which have a potentially dilutive impact on earnings per share. As of SeptemberJune 30, 2017, 2018, the aggregate intrinsic value of outstanding stock options and warrants was approximately $1.0$1.5 million. For the three and six months ended June 30, 2017, the dilutive share instruments did not have an intrinsic value, as a result, were not included in the diluted share calculation. Dilution is not permitted if there areis a net lossesloss during the period. As such, the Company does not show dilutive earnings per share for the three and ninesix months ended SeptemberJune 30, 20172018 and 2016.2017.

Loan Fees and Other Deferred Costs

In the normal course of business, the Company enters into loan agreements and amendments thereto with its primary lending institutions. The majority of these lending agreements and amendments require origination fees and other fees in the course of executing the agreements. For all costs associated with the execution of the lending agreements,line-of-credit arrangements, the Company recognizes these as capitalized costs and amortizes these costs over the term of the loan agreement. All other costs not associated with the execution of the loan agreements are expensed as incurred. As of SeptemberJune 30, 2017, 2018, we had approximately $230,000$210,000 in unamortized loan fees and other deferred costs associated with the Loan and Security Agreement (the "2017 Credit Agreement,Agreement") with East West Bank, a California banking corporation ("East West Bank"), recorded in Other Assets which we expect to charge to expense ratably over the three-yearthree-year term of that agreement. 

Derivative Instruments

Income TaxesFrom time to time, the Company has interest rate swap agreements in place to hedge against changes in interest rates. The fair value of the Company’s derivative instruments are reflected as assets or liabilities on the balance sheet. The accounting for changes in the fair value of a derivative instrument depends on the intended use of the derivative instrument and the resulting designation. Transactions related to the Company’s derivative instruments accounted for as hedges are classified in the same category as the item hedged in the consolidated statement of cash flows. The Company did not hold derivative instruments at June 30, 2018 or December 31, 2017, for trading purposes.

On February 23, 2018, we entered into an interest rate swap agreement with East West Bank in order to hedge against the variability in cash flows from future interest payments related to the 2017 Credit Agreement. The terms of the interest rate swap agreement included an initial notional amount of $10.0 million, a fixed payment rate of 2.52%. The purpose of the swap agreement is to adjust the interest rate profile of our debt obligations. The fair value of the interest rate swap agreement is recorded in Other Assets and changes to the fair value are recorded to Other Income (Expense).

On September 17, 2015, we entered into an interest rate swap agreement with PNC in order to hedge against the variability in cash flows from future interest payments related to the 2014 Credit Agreement. The terms of the interest rate swap agreement included an initial notional amount of $10.0 million, a fixed payment rate of 1.88% plus applicable a margin ranging from 4.50% to 5.50% paid by us and a floating payment rate equal to LIBOR plus applicable margin of 4.50% to 5.50% paid by PNC. The purpose of the swap agreement was to adjust the interest rate profile of our debt obligations and to achieve a targeted mix of floating and fixed rate debt.

In connection with the termination of the 2014 Credit Agreement, on August 10, 2017, we terminated the interest rate swap agreement with PNC. Changes in the fair value of the interest rate swap agreement were recorded in earnings. The Company was not party to any derivative instruments as of December 31, 2017.

Income Taxes 

The Company recognizes deferred tax liabilities and assets based on the differences between the tax basis of assets and liabilities and their reported amounts in the financial statements that will result in taxable or deductible amounts in future years. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities will be recognized in income in the period that includes the enactment date. A deferred tax asset or liability that is not related to an asset or liability for financial reporting is classified according to the expected reversal date. The Company records a valuation allowance to reduce deferred tax assets to an amount that it believes is more likely than not to be realized.

The Company accounts for any uncertainty in income taxes by recognizing the tax benefit from an uncertain tax position only if, in the Company’s opinion, it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The Company measures the tax benefits recognized in the financial statements from such a position based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. The application of income tax law is inherently complex. Laws and regulations in this area are voluminous and are often ambiguous.  As such, the Company is required to make many subjective assumptions and judgments regarding income tax exposures. Interpretations of and guidance surrounding income tax law and regulations change over time and may result in changes to the Company’s subjective assumptions and judgments which can materially affect amounts recognized in the consolidated balance sheets and consolidated statements of income. The result of the reassessment of the Company’s tax positions did not have an impact on the consolidated financial statements.

Interest and penalties associated with tax positions are recorded in the period assessed as general and administrative expenses.income tax expense. The Company files income tax returns in the United States and in the states in which it conducts its business operations. The Company’s United States federal income tax filings for tax years 20122013 through 20162017 remain open to examination inexamination. In general, the taxing jurisdictionsCompany’s various state tax filings remain open for tax years 2013 to which the Company is subject.2017.

Fair Value

The Company follows authoritative guidance that applies to all financial assets and liabilities required to be measured and reported on a fair value basis. The Company also applies the guidance to non-financial assets and liabilities measured at fair value on a nonrecurring basis, including non-competition agreements and goodwill. The guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date.  The guidance establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available.

Observable inputs are inputs that market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions of what market participants would use in pricing the asset or liability based on the best information available in the circumstances.  Beginning in 2017 the Company valued its warrants using the Binomial Lattice model ("Lattice"). The Company did not change its valuation techniques nor were there have any transfers between hierarchy levels during the nine three and six months ended SeptemberJune 30, 2017.2018 or 2017, respectively. The financial and nonfinancial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement.

The hierarchy is broken down into three levels based on the reliability of the inputs as follows:

Stock-based Compensation

Stock-based compensation cost is measured at the date of grant, based on the calculated fair value of the award as described below, and is recognized over the requisite service period, which is generally the vesting period of the equity grant.

The Company uses the Black-Scholes pricing model as a method for determining the estimated grant date fair value for all stock options awarded to employees, independent contractors, officers, and directors. The expected term of the options is based upon evaluation of historical and expected further exercise behavior. The risk-free interest rate is based upon U.S. Treasury rates at the date of grant with maturity dates approximately equal to the expected life of the grant. Volatility is determined upon historical volatility of our stock and adjusted if future volatility is expected to vary from historical experience. The dividend yield is assumed to be none as we have not paid dividends nor do we anticipate paying any dividends in the foreseeable future.

The Company also uses the Black-Scholes valuationa Lattice model to determine the fair value of certain warrants. The expected term used was the remaining contractual term. Expected volatility is based upon the weighted average of historical volatility over a term consistent with the contractual term of the warrant and implied volatility.remaining term. The risk-free interest rate is based upon impliedderived from the yield on azero-coupon U.S. Treasury zero-coupon issuegovernment securities with a remaining term equal to the contractual term of the warrants. The dividend yield is assumed to be none.zero.

The Company used the market-value of Company stock to determine the fair value of the performance-based restricted stock awarded in June 2018. The fair-value is updated quarterly based on actual forfeitures.

The Company used a Monte Carlo simulation program to determine the fair value of market-based restricted stock awarded in June 2018.

Management Estimates

The preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include the realization of accounts receivable, stock basedstock-based compensation expense, income tax provision, the valuation of derivative financial instruments (warrants and interest rate swaps), and the valuation of deferred taxes. Actual results could differ from those estimates.

Reclassifications

Certain prior-period amounts have been reclassified for comparative purposes to conform to the fiscal 201current7 presentation. These reclassifications have no effect on the Company’s consolidated statement of operations.

Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers”, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. In August 2015 the FASB agreed to defer the effective date by one year, the new standard becomes effective for us on January 1, 2018. Early adoption is permitted. The standard permits the use of either the retrospective or cumulative effect transition method. We are currently determining the impact of the new standard on revenue from the services we provide. Our approach includes performing a detailed review of key contracts representative of our different subsidiary businesses and comparing historical accounting policies and practices to the new standard. Our services are primarily short-term in nature, and generally revenue is recognized at a point in time when services are completed. Our assessment is that for the significant majority of our revenue, we do not expect the new revenue recognition standard will have a material impact on our financial statements upon adoption. However, from time to time we enter into service contracts with certain of our customers whereby revenue is earned over a period of time. We anticipate that with the adoption of ASU 2014-09, we will be required to disclose these various revenue streams on a disaggregated basis and provide disclosure detailing our considerations with regard to revenue recognized under service contracts.  We currently intend to adopt the new standard as of January 1, 2018.

In February 2016, the FASB issued ASU 2016-022016-02 “Leases (Topic 842)842)”, which requires a lessee to record a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. AEither a modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements.statements, or a prospective approach recognizing the cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption is required. We continue to evaluate the impact of this new standard on our consolidated financial statements. Once adopted, the Company expects to recognize additional assets and liabilities on its consolidated balance sheet related to operating leases with terms longer than one year.

Recently Adopted

In May 2014, the Financial Accounting Standards Board ("FASB") issued new revenue recognition guidance under Accounting Standards Update ("ASU") 2014-09 that superseded the existing revenue recognition guidance under GAAP. The new standard focuses on creating a single source of revenue guidance for revenue arising from contracts with customers for all industries. The objective of the new standard is for companies to recognize revenue when it transfers the promised goods or services to its customers at an amount that represents what the company expects to be entitled to in exchange for those goods or services. In July 2015, the FASB deferred the effective date by one year (ASU 2015-14). This ASU is now effective for annual periods, and interim periods within those annual periods, beginning on or after December 15, 2017. Since the issuance of the original standard, the FASB has issued several other subsequent updates including the following: 1) clarification of the implementation guidance on principal versus agent considerations (ASU 2016-08); 2) further guidance on identifying performance obligations in a contract as well as clarifications on the licensing implementation guidance (ASU 2016-10); 3) rescission of several SEC Staff Announcements that are codified in Topic 605 (ASU 2016-11); and 4) additional guidance and practical expedients in response to identified implementation issues (ASU 2016-12). The Company adopted the new guidance effective January 1, 2018 using the modified retrospective approach, which recognizes the cumulative effect of application recognized on that date. The adoption of this standard had no impact on our consolidated financial statements; however, our footnote disclosure was expanded.

In August 2016, the FASB issued ASU 2016-15,2016-15, “Statement of Cash Flows (Topic 230)230), Classification of Certain Cash Receipts and Cash Payments (a consensus of the FASB Emerging Issues Task Force) (ASU 2016-15)2016-15)”, that clarifies how entities should classify certain cash receipts and cash payments on the statement of cash flows. The guidance also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. The guidance will be effective for annual periods beginning after December 15, 2017 and interim periods within those annual periods. Early adoption is permitted. The Company is evaluatingadopted the effectnew guidance effective on January 1, 2018 using a retrospective transition method to each period presented. The adoption of ASU 2016-152016-15 did not result in any impact to the presentation of our statement of cash flows.

In January 2017, the FASB issued ASU 2017-01, "Business Combinations (Topic 805): Clarifying the Definition of a Business," that clarifies the definition of a business. This ASU provides a screen to determine whether a group of assets constitutes a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated as acquisitions. If the screen is not met, this ASU (1) requires that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create an output and (2) removes the evaluation of whether a market participant could replace missing elements. Although outputs are not required for a set to be a business, outputs generally are a key element of a business; therefore, the FASB has developed more stringent criteria for sets without outputs. We adopted this ASU in the first quarter of 2018 and the adoption of this ASU did not have a material impact on itsthe consolidated financial statements.

Recently Adopted

In March 2016,May 2017, the FASB issued ASU 2016-09 “Compensation –2017-09, "Compensation - Stock Compensation (Topic 718)”,: Scope of Modification Accounting," which simplifies several aspects of the accounting for share-based payments, including immediate recognition of all excess tax benefits and deficiencies in the income statement, changing the threshold to qualify for equity classification upprovides guidance about which changes to the employees' maximum statutory tax rates, allowingterms or conditions of a share-based payment award require an entity-wideentity to apply modification accounting policy election to either estimatein Topic 718. The Company adopted this ASU on January 1, 2018, and the number of awards that are expected to vest or account for forfeitures as they occur, and clarifying the classification on the statement of cash flows for the excess tax benefit and employee taxes paid when an employer withholds shares for tax-withholding purposes. The adoption of this guidance did not have a material impact on the Company’s consolidated financial position, results of operations, or cash flows.statements.

Note 34 - Property and Equipment

Property and equipment consists of the following:following (amounts in thousands):

Note 45 – Revolving Credit Facilities

Note 56 – Long-Term Debt

Long-term debt (excluding borrowings under our 2017 Credit Agreement described in Note 5)4) consists of the following:following (in thousands):

Note 67 – Fair Value Measurements

The following table presents the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis by level within the fair value hierarchy:

The Company's warrant liability was valued as a derivative instrument at issuance and at September 30, 2017 using the Black-Scholes option pricinga combination of a Brownian Motion technique and a Lattice model, using observable market inputs and management judgment based on the following assumptions: a risk-freeassumptions. On June 29, 2018, both warrants, entitling the Holder to acquire 1,612,902 shares of our $0.005 par value common stock were exercised, and proceeds in the amount of $500,000 were used to reduce the subordinated debt balance.

The fair value of the interest rate of 1.62%, expected dividend yield of 0%,swap is estimated using a term of 2.4 years,discounted cash flow model. Such models involve using market-based observable inputs, including interest rate curves. We incorporate credit valuation adjustments to appropriately reflect both our nonperformance risk and a volatility of 100.10%. The valuation policies used are approved by the Chief Financial Officer who reviews and approves the inputs usedrespective counterparty’s nonperformance risk in the fair value calculations andmeasurements, which we have concluded are not material to the changes in fair value measurements from periodvaluation. Due to period for reasonableness. Fair value measurements are discussed with the Company’s Chief Executive Officer, as deemed appropriate.

The Company’s interest rate swap is valued using models which require a variety of inputs, including contractual terms, market prices, yield curves, credit spreads,swaps being unique and correlations of such inputs. Some of the model inputs used in valuing the derivative instruments trade in liquid markets, and therefore the derivative instrument is classified within Level 2 ofnot actively traded, the fair value hierarchy. For applicable financialis classified as Level 2.

Certain assets carriedand liabilities are measured at fair value on a nonrecurring basis. These assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances. As of June 30, 2018, and December 31, 2017, the credit standingcarrying value of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses, and interest approximates fair value due to the short-term nature of such items. The carrying value of the counterparties is analyzed and factored into the fair value measurement of those assets. The fair value estimates of our derivative financial instruments do not reflect their actual trading value.

The change inCompany’s credit agreements are carried at cost which are approximately the fair value of the warrant liability resulted in a chargedebt as the related interest rate are at the terms that approximate rates currently available to earnings of approximately $280,000 during the three and nine months ended September 30, 2017, and is included within Other (expense) income in the accompanying consolidated statement of operations. Company.

The Company did not have any transfers of assets or liabilities between Level 1, Level 2 or Level 3 of the fair value measurement hierarchy during the three and six months ended June 30, 2018 and 2017.

Note 78 – Income Taxes

Income tax expense during interim periods is based on applying an estimated annual effective income tax rate to year-to-date income, plus any significant unusual or infrequently occurring items which are recorded in the interim period.  The provision for income taxes for the three months ended SeptemberJune 30, 2017 2018 and 20162017 differs from the amount that would be provided by applying the statutory U.S. federal income tax rate of 21% and 34%, respectively to pre-tax income primarily because of state income taxes and estimated permanent differences.

The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not limited to, the expected operating income for the year, projections of the proportion of income earned and taxed in various jurisdictions, permanent and temporary differences, and the likelihood of recovering deferred tax assets generated in the current year.  The accounting estimates used to compute the provision for income taxes may change as new events occur, more experience is obtained, additional information becomes known or as the tax environment changes.

In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment.

Based upon the level of historical taxable income and projections for future taxable income over the periods in which the deferred tax assets are deductible, management recorded a valuation allowance to reduce its net deferred tax assets to zero.

During the three and ninesix months ended SeptemberJune 30, 2018, the Company recorded an income tax expense of approximately $32,000 related to state income taxes owed. During the six months ended June 30, 2017, the Company recorded netan income tax benefit of $1.4 millionapproximately $992,000.

On December 22, 2017, the U.S. government enacted comprehensive tax legislation (the “Tax Act”), which significantly revises the ongoing U.S. corporate income tax law by lowering the U.S. federal corporate income tax rate from 35% to 21%, implementing a territorial tax system, imposing a one-time tax on foreign unremitted earnings and $2.4 million, respectively, primarilysetting limitations on deductibility of certain costs, among other things.

The Company is subject to the provisions of the Financial Accounting Standards Board (“FASB”) ASC 740-10, Income Taxes, which requires that the effect on deferred tax assets and liabilities of a change in tax rates be recognized in the period the tax rate change was enacted. Due to the complexities involved in accounting for the recently enacted Tax Act, the U.S. Securities and Exchange Commission’s Staff Accounting Bulletin (“SAB”) 118 requires that the Company include in its financial statements the reasonable estimate of the impact of the Tax Act on earnings to the extent such estimate has been determined.

Pursuant to the SAB118, the Company is allowed a measurement period of up to one year after the enactment date of the Tax Act to finalize the recording of the related tax impacts. The final impact on the Company from the Tax Act’s transition tax legislation may differ from the aforementioned estimates due to our net operating losses during the threecomplexity of calculating and nine months ended September 30, 2017. Assupporting with primary evidence such U.S. tax attributes such as accumulated foreign earnings and profits, foreign tax paid, and other tax components involved in foreign tax credit calculations for prior years back to 1998. Such differences could be material, due to, among other things, changes in interpretations of September 30, 2017,the Tax Act, future legislative action to address questions that arise because of the Tax Act, changes in accounting standards for income taxes or related interpretations in response to the Tax Act, or any updates or changes to estimates the Company had recorded a deferredhas utilized to calculate the transition tax's reasonable estimate. The Company will continue to evaluate the impact of the U.S. Tax Act and will record any resulting tax asset, net, of approximately $2.0 million. adjustments during 2018.

Note 89 – Commitments and Contingencies

Operating Leases

As of SeptemberJune 30, 2017, 2018, the Company leases facilities and certain equipment under lease commitments that expire through August 2022. Future minimum lease commitments for these operating lease commitments are as follows:follows (in thousands):

Rent expense under operating leases, including month-to-month leases, for the three and six months ended June 30, 2018, were approximately $209,000 and nine months ended September 30, 2017 were approximately $185,000 and $589,000,$437,000, respectively. Rent expense under operating leases, including month-to-month leases, for the three and ninesix months ended SeptemberJune 30, 20162017, were $188,000approximately $191,000 and $591,000$405,000, respectively.

HydroFLOW Agreement

             Pursuant to a Sales Agreement with HydroFLOW USA, HWWM has the exclusive right to sell or rent patented hydropath devices in connection with bacteria deactivation and scale treatment services for treating injection and disposal wells, fracking water and recycled water in the oil and gas industry to HWWM customers in the United States. Pursuant to the sales agreement, HWWM is required to pay 3.5% royalties of its gross revenues on certain rental transactions and, in order to maintain the exclusivity provision under the agreement, the Company is required to purchase approximately $655,000 of equipment per year commencing in 2016 and ending 2025. In November 2016, the Company and HydroFLOW USA agreed to allocate $220,000 of the 2016 commitment to 2017, thereby increasing the minimum purchase requirement for 2017 to $875,000. During the nine months ended September 30, 2017, the Company completed the purchase of $280,000 of equipment to fulfill its 2016 purchase commitment for exclusivity. During the three and nine months ended September 30, 2017 and 2016, the Company did not accrue or pay any royalties to HydroFLOW. The Company has negotiated a release of all 2016 and 2017 purchase commitments, while leaving intact the exclusive right to sell or rent the patented hydropath devices through 2017. 

Self-Insurance

In June 2015, the Company became self-insured under its Employee Group Medical Plan, and currently is responsible to pay the first $50,000$50,000 in medical costs per individual participant. individual participant up to a maximum of approximately $1.8 million in the aggregate based on enrollment. The Company had an accrued liability of approximately $55,000$74,000 and $23,000$102,000 as of SeptemberJune 30, 2017 2018 and December 31, 2016, 2017, respectively, for insurance claims that it anticipates paying in the future related to claims that occurred prior to quarter end.June 30, 2018.

Effective April 1, 2015, the Company had entered into a workers’workers’ compensation and employer’s liability insurance policy with a term through March 31, 2018.  Under the terms of the policy, the Company iswas required to pay premiums in addition to a portion of the cost of any claims made by our employees, up to a maximum of approximately $1.5$1.8 million over the term of the policy. In policy (an amount that was variable with changes in annualized compensation amounts). As of June 2017, an30, 2018, a former employee of one of our subsidiariesours had an open claim relating to injuries sustained bodily injury while in the course of employment, and the projected maximum cost of the policy included estimated claim exceeded the amount we had previously paid in under the policy. As a result, during the three months ended September 30, 2017, we made a payment of approximately $612,000 under the terms of the policy. The amount was based on an estimate of the total cost of the claim, including costs that as of September 30, 2017, have not yet been paid or incurred in connection with the claim. During the three monthsyear ended September 30,December 31, 2017, our insurance carrier formally denied the workers' compensation claim and is moving to close the claim entirely. As a result, duringPer the three months ended Septemberterms of our insurance policy, through June 30, 2017, we reversed an accrual 2018, we had recorded during the three months ended June 30, 2017, based on our estimatepaid in approximately $1.8 million of the expected totalprojected maximum plan cost of $1.8 million, and had recorded approximately $1.3 million as expense over the insurance plan.term of the policy. We recorded the remaining approximately $572,000$505,000 in payments made under the planpolicy as a long-term asset, which we expect will either be recorded as expense in future periods, or refunded to us by ourthe insurance carrier, depending on the outcome of the claim described above and the final cost of any additional open claims incurred under the policy.  Per the terms of our policy, through September 30, 2017, we had paid in approximately $1.4 million of the projected maximum plan cost of $1.5 million. As of SeptemberJune 30, 2017, 2018, we estimate that our maximum continued exposure to thisbelieve we have paid all amounts contractually due under the policy. Effective April 1, 2018, we entered into a new workers’ compensation policy with a fixed premium amount determined annually, and other workers' compensation claims through the term of our policy and additional policy premiums is approximately $162,000.therefore are no longer partially self-insured.

Litigation

The Company and ourits subsidiary Heat Waves Hot Oil Service LLC (“Heat Waves”) are defendants in a stayed civil lawsuit in federal court in Colorado, Civil Action No. 1:15-cv-00983-RBJ (“Colorado Case”), that alleges that Enservco and Heat Waves, in offering and selling frac water heating services, infringed and induced others to infringe two patents owned by Heat-On-The-Fly, LLC (“HOTF”). The complaint relates to only a portion of the frac water heating services provided by Heat Waves. The Colorado Case is nowhas been stayed pending a final resolution of an appeal by HOTF to the U.S. Court of Appeals for the Federal Circuit (“Federal Circuit”) of a North Dakota court’sCourt’s ruling that the primary patent (“the ‘993 Patent”) in the Colorado Case was invalid. Neither Enservco nor Heat Waves is a party to the North Dakota Case, which involves other energy companies.

In March of 2015, the North Dakota Court determined that the ‘993 Patent was invalid. The ‘993same Court also later found that the ‘993 Patent has undergone several reexaminationswas unenforceable due to inequitable conduct by the USPTOPatent Owner and/or the inventor. As noted above, the Patent Owner appealed these judgments to the Federal Circuit as well as several other adverse judgments and orders by the North Dakota Court.  On May 4, 2018, among other things, the Federal Circuit, affirmed the North Dakota Court’s finding of inequitable conduct with regard to the ‘993 Patent; agreed with the North Dakota jury’s finding that HOTF acted in February 2015,bad faith in connection with a tortious interference claim; set aside the USPTO rejected all 99 claimsNorth Dakota Court’s denial of the Energy Companies’ attorneys’ fees; and chose not to address the North Dakota Court’s finding of invalidity of the ‘993 PatentPatent.  The case has been sent back to the North Dakota Court to determine the issue of the energy companies’ attorneys’ fees.  In July of 2018, HOTF requested that the three-judge panel of the Federal Circuit reconsider its May 4, 2018 judgement. On August 6, 2018 the Federal Circuit Court denied the HOTF request for a rehearing. In addition to the request made in July, HOTF can petition the latest reexamination.  However, in May 2016,U.S. Supreme Court or ask that these issues be heard by the USPTO reversed its decision and confirmed all 99 claims as being patentable overentire bench of the cited prior art in the reexamination proceeding. Further, inFederal Circuit.

In September 2016 and February 2017, HOTF was issued two additional patents, both of which could be asserted against the Company.Enservco and/or Heat Waves. Management believes that final findings of invalidity and/or unenforceability of the ‘993 Patent based on inequitable conduct could serve as a basis to affect the validity and/or enforceability of each of HOTF’s patents. If all of these Patents are ultimately held to be invalid and/or enforceable,unenforceable, the Colorado Case would become moot.

In the event that HOTF’s appeal is successfulHOTF ultimately succeeds after exhausting all appeals and the ‘993 Patent is found to be valid and/or enforceable, in the North Dakota Case, the Colorado Case may resume. To the extent that Enservco and Heat Waves are unsuccessful in their defense of the Colorado Case, they could be liable for enhanced damages/attorneys’ fees (both of which may be significant) and Heat Waves could possibly be enjoined from using any technology that is determined to be infringing. Either result could negatively impact Heat Waves’ business and operations. At this time, the Company is unable to predict the outcome of this case, and accordingly has not recorded an accrual for any potential loss.

Note 910 – Stockholders’ Equity

Warrants

In conjunction with a private placement transaction and subordinated debt conversion in November 2012, the Company granted warrants to purchase shares of the Company’s common stock, exercisable at $0.55 per share for a five year term. Each of the warrants may be exercised on a cashless basis. The warrants also provide that subject to various conditions, the holders have piggy-back registration rights with respect to the shares of common stock that may be acquired upon the exercise of the warrants. As of September 30, 2017, 150,001 of these warrants remain outstanding.

In June 2016, the Company granted a principal of the Company’s existing investor relations firm warrants to acquire 30,000 shares of the Company’s common stock in connection with a reduction of the firm's ongoing monthly cash service fees. The warrants had a grant-date fair value of $0.36$0.36 per share and vestvested over a one year-year period, 15,000 on December 21, 2016 and 15,000 on June 21, 2017. As of SeptemberJune 30, 2017, 30,0002018, all of these warrants remain outstanding.outstanding and are exercisable until June 21, 2021 at $0.70 per share.

In June 2017, in connection with a subordinated loan agreement described in more detail in Note 5,, the Company granted Cross River two five-yearfive-year warrants to buy an aggregate total of 1,612,902 shares of the Company’s common stock at an exercise price of $0.31$0.31 per share, the average closing price of the Company’s common stock for the 20 day-day period ended May 11, 2017. The warrants had a grant-date fair value of $0.19$0.19 per share and vested in full on June 28, 2017. These warrants arewere accounted for as a liability in the accompanying balance sheet. Assheet as of September 30, 2017, allDecember 31, 2017. On June 29, 2018 Cross River exercised both warrants and acquired 1,612,902 shares of theseour $0.005 par value common stock. Proceeds from the exercise of the warrants remain outstanding.in the amount of $500,000 were used to reduce the subordinated debt balance.

A summary of warrant activity for the ninesix months ended SeptemberJune 30, 2017 2018 is as follows:follows (amounts in thousands):