Enservco (ENSV) 10-Q 14 Aug 18 2018 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 07, 2018
Document Information [Line Items]
Entity Registrant Name	Enservco Corporation
Entity Central Index Key	319,458
Trading Symbol	ensv
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		54,464,829
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 235	$ 391
Accounts receivable, net	5,131	11,761
Prepaid expenses and other current assets	657	868
Inventories	494	576
Income tax receivable, current	57	57
Total current assets	6,574	13,653
Property and equipment, net	27,456	29,417
Income tax receivable, noncurrent	57	57
Other assets	1,191	1,123
TOTAL ASSETS	35,278	44,250
Current Liabilities
Accounts payable and accrued liabilities	2,350	5,465
Current portion of long-term debt	142	182
Total current liabilities	2,492	5,647
Long-Term Liabilities
Senior revolving credit facility	21,729	27,066
Subordinated debt	1,808	2,229
Long-term debt, less current portion	225	252
Warrant liability		831
Total long-term liabilities	23,762	30,378
Total liabilities	26,254	36,025
Commitments and Contingencies (Note 8)
Stockholders' Equity
Preferred stock, $.005 par value, 10,000,000 shares authorized, no shares issued or outstanding	0	0
Common stock, $.005 par value, 100,000,000 shares authorized, 54,464,829 and 51,197,989 shares issued, respectively; 103,600 shares of treasury stock; and 54,361,229 and 51,094,389 shares outstanding, respectively	272	255
Additional paid-in capital	21,594	19,571
Accumulated deficit	(12,842)	(11,601)
Total stockholders' equity	9,024	8,225
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 35,278	$ 44,250

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Preferred stock, par value (in dollars per share)	$ 0.005	$ 0.005
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.005	$ 0.005
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	54,464,829	51,197,989
Common stock, shares outstanding (in shares)	54,361,229	51,094,389
Treasury stock, shares (in shares)	103,600	103,600

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Revenues	$ 8,792,000	$ 7,106,000	$ 29,913,000	$ 20,881,000
Expenses
Cost of Revenue	8,013,000	6,433,000	23,154,000	16,812,000
Sales, general, and administrative expenses	1,241,000	1,290,000	2,611,000	2,284,000
Patent litigation and defense costs	55,000	24,000	75,000	67,000
Severance and Transition Costs	593,000	768,000	633,000	768,000
Depreciation and amortization	1,597,000	1,675,000	3,186,000	3,251,000
Total operating expenses	11,499,000	10,190,000	29,659,000	23,182,000
(Loss) Income from Operations	(2,707,000)	(3,084,000)	254,000	(2,301,000)
Other (Expense) Income
Interest expense	(511,000)	(500,000)	(1,011,000)	(1,210,000)
Gain on disposals	53,000		53,000
Other (expense) income	(85,000)	38,000	(505,000)	42,000
Total other expense	(543,000)	(462,000)	(1,463,000)	(1,168,000)
Loss Before Tax Benefit (Expense)	(3,250,000)	(3,546,000)	(1,209,000)	(3,469,000)
Income Tax (Expense) Benefit	(32,000)	1,019,000	(32,000)	992,000
Net Loss	$ (3,282,000)	$ (2,527,000)	$ (1,241,000)	$ (2,477,000)
Earnings per Common Share - Basic (in dollars per share)	$ (0.06)	$ (0.05)	$ (0.02)	$ (0.05)
Earnings per Common Share – Diluted (in dollars per share)	$ (0.06)	$ (0.05)	$ (0.02)	$ (0.05)
Basic weighted average number of common shares outstanding (in shares)	51,677	51,068	51,413	51,068
Add: Dilutive shares (in shares)
Diluted weighted average number of common shares outstanding (in shares)	51,677	51,068	51,413	51,068
Well Enhancement Services Segment [Member]
Revenues
Revenues	$ 7,005,000	$ 5,819,000	$ 26,290,000	$ 17,803,000
Expenses
Cost of Revenue	5,900,000	4,325,000	18,991,000	12,774,000
Depreciation and amortization	1,226,000	1,253,000	2,455,000	2,424,000
Water Transfer Services Segment [Member]
Revenues
Revenues	929,000	306,000	1,924,000	1,058,000
Expenses
Cost of Revenue	979,000	616,000	1,936,000	1,292,000
Depreciation and amortization	289,000	246,000	552,000	478,000
Water Hauling Services Segment [Member]
Revenues
Revenues	858,000	881,000	1,699,000	1,766,000
Expenses
Cost of Revenue	953,000	1,192,000	1,901,000	2,105,000
Depreciation and amortization	77,000	168,000	167,000	333,000
Unallocated and Other Segments [Member]
Revenues
Revenues		100,000		254,000
Expenses
Cost of Revenue	181,000	300,000	326,000	641,000
Depreciation and amortization	$ 5,000	$ 8,000	$ 12,000	$ 16,000

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES
Net loss	$ (1,241,000)	$ (2,477,000)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	3,186,000	3,251,000
Deferred income taxes		(879,000)
Gain on disposal of equipment	(53,000)
Stock-based compensation	188,000	446,000
Change in fair value of warrant	540,000
Amortization of debt issuance costs and discount	126,000	298,000
Provision for bad debt expense	33,000	49,000
Changes in operating assets and liabilities
Accounts receivable	6,598,000	729,000
Inventories	82,000	(3,000)
Prepaid expense and other current assets	241,000	152,000
Income taxes receivable		224,000
Other assets	(60,000)	(32,000)
Accounts payable and accrued liabilities	(3,115,000)	260,000
Net cash provided by operating activities	6,525,000	2,018,000
INVESTING ACTIVITIES
Purchases of property and equipment	(1,470,000)	(971,000)
Proceeds from insurance claims	122,000
Proceeds from disposal of equipment	145,000	121,000
Net cash used in investing activities	(1,203,000)	(850,000)
FINANCING ACTIVITIES
Net line of credit payments	(5,386,000)	(2,000,000)
Proceeds from issuance of long-term debt		1,000,000
Repayment of long-term debt	(66,000)	(168,000)
Other financing	(26,000)
Net cash used in financing activities	(5,478,000)	(1,168,000)
Net Increase (Decrease) in Cash and Cash Equivalents	(156,000)
Cash and Cash Equivalents, beginning of period	391,000	621,000
Cash and Cash Equivalents, end of period	235,000	621,000
Supplemental cash flow information:
Cash paid for interest	863,000	36,000
Cash paid (received) for taxes	32,000	(222,000)
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Non-cash proceeds from revolving credit facilities	49,000	815,000
Cashless exercise of stock options	994,000
Non-cash proceeds from warrant exercise	500,000
Non-cash subordinated debt principal repayment	(500,000)
Non-cash conversion of warrant liability to equity	1,371,000
Non-cash proceeds from subordinated debt borrowings		1,500,000
Non-cash repayment of revolving credit facility		$ (1,500,000)

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	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). 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 June 30, 2018 December 31, 2017 three six June 30, 2018 2017. The below table provides an overview of the Company ’s current ownership hierarchy: Name State of Formation Ownership Business Dillco Fluid Service, Inc. (“Dillco”) Kansas 100% by Enservco Oil and natural gas field fluid logistic services. Heat Waves Hot Oil Service LLC (“Heat Waves”) Colorado 100% by Enservco Oil and natural gas well services, including logistics and stimulation. Heat Waves Water Management LLC (“HWWM”) Colorado 100% by Enservco Water Transfer and Water Treatment Services. HE Services LLC (“HES”) Nevada 100% by Heat Waves No active business operations. Owns construction equipment used by Heat Waves. Real GC, LLC (“Real GC”) Colorado 100% by Heat Waves No active business operations. Owns real property in Garden City, Kansas that is utilized by Heat Waves. 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 8 X. not not 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 December 31, 2017.

Note 2 - Summary of Significant

Note 2 - Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2 - Summary of Significant Accounting Policies Cash and Cash Equivalents The Company considers all highly liquid instruments purchased with an original maturity of three may 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 uncollectible 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 June 30, 2018, December 31, 2017, 65,000 d $70,000, three 30, 2018, $1,000 six June 30, 2018 33,000 . For the three six June 30, 2017 $20 ,000 and $49,000, 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 net realizable value in accordance with the first first three six June 30, 2018 2017, no Property and Equipment Property and equipment consists of (i) trucks, trailers and pickups; (ii) water transfer pumps, pipe, lay flat hose, trailers, and other support equipment; (iii) real property which includes land and buildings used for office and shop facilities and wells used for the disposal of water; and (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 30 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 ’s facility leases contain renewal clauses and expire through August 2022. June 30, 2018, December 31, 2017, 90,000 and $96,000, 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 no June 30, 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 not No three six June 30, 2018 2017. Revenue Recognition As described below, we adopted Accounting Standards Update 2014 09, 606, January 1, 2018, no not 30 60 Revenue is not Revenue is recognized for certain projects that take more than one not June 30, 2018 December 31, 2017 $15,000 $1.7 Disaggregation of revenue See Note 11 Earnings (Loss) Per Share Earnings per Common 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 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 As of June 30, 2018, 2017 , there were outstanding stock options and warrants to acquire an aggregate of 2,662,766 and 5,749,433 , respectively, which have a potentially dilutive impact on earnings per share. As of June 30, 2018, 1.5 million. For the three six June 30, 2017, not not not not three six 30, 2018 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 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 June 30, 2018, 210,000 in unamortized loan fees and other deferred costs associated with the "2017 , recorded in Other Assets which we expect to charge to expense ratably over the three Derivative Instruments From 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 June 30, 2018 December 31, 2017, On February 23, 2018, 2017 $10.0 2.52%. On September 17, 2015, 2014 $10.0 1.88% 4.50% 5.50% 4.50% 5.50% In connection with the termination of the 2014 August 10, 2017, Changes in the fair value of the interest rate swap agreement were recorded in earnings. The Company was not 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 not 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 50% may not Interest and penalties associated with tax positions are recorded in the period assessed as 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 2013 2017 2013 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 not three six June 30, 2018 2017, The hierarchy is broken down into three Level 1: Quoted prices are available in active markets for identical assets or liabilities; Level 2: Quoted prices in active markets for similar assets and liabilities that are observable for the asset or liability; or Level 3: Unobservable pricing inputs that are generally less observable from objective sources, such as discounted cash flow models or valuations. 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 not The Company uses a Lattice model to determine the fair value of certain warrants. The expected term used was the remaining contractual term. Expected volatility is based upon historical volatility over a term consistent with the remaining term. The risk-free interest rate is derived from the yield on 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 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-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 current presentation. These reclassifications have no Accounting Pronouncements In February 2016, 2016 02 842 12 December 15, 2018, one Recently Adopted In May 2014, 2014 09 July 2015, one 2015 14 December 15, 2017. 1 2016 08 2 2016 10 3 605 2016 11 4 2016 12 January 1, 2018 no In August 2016, 2016 15, 230 2016 15 one December 15, 2017 January 1, 2018 2016 15 not In January 2017, 2017 01, 805 not not 1 2 not first 2018 not In May 2017, 2017 09, 718 718. January 1, 2018, not

Note 3 - Property and Equipment

Note 3 - Property and Equipment	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	Note 3 - Property and Equipment Property and equipment consists of the following (amounts in thousands): June 30, December 31, 2018 2017 Trucks and vehicles $ 55,078 $ 54,925 Water transfer equipment 5,119 4,688 Other equipment 3,164 3,160 Buildings and improvements 3,551 3,551 Land 681 681 Disposal wells 391 391 Total property and equipment 67,984 67,396 Accumulated depreciation (40,528 ) (37,979 ) Property and equipment – net $ 27,456 $ 29,417

Note 4 - Revolving Credit Facil

Note 4 - Revolving Credit Facilities	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 4 – Revolving Credit Facilities East West Bank Revolving Credit Facility On August 10, 2017, 2017 which provides for a three $30 2017 85% 85% 2017 no 1 3.5% 1.75%. 0.5% August 10, 2020. 2017 one As of June 30, 2018, 2017 $21.7 5.61 $21.0 6.5 $729,000 June 30, 2018, $7.4 2017 Under to the 2017 ( 1 Fixed Charge Coverage Ratio (“FCCR”) of not 1.10 1.00 January 1, 2017, December 31, 2017, twelve ( 2 twelve 1.20 1.00, o maintain minimum liquidity of $1,500,000 2017 On August 10, 2017, $21.8 was made under the New Credit Facility to repay in full all obligations outstanding under our 2014 On November 20, 2017, 2017 2017 September 30, 2017 October 31, 2017 November 30, 2017. As of June 30, 2018, $7.6 $7.4 2017 $235,000 As of June 30, 2018, 2017 PNC Revolving Credit Facility On March 31, 2017, "2014 $1.5 March 31, 2017; ( $1 May 15, 2017; ( September 12, 2019 April 30, 2018; ( four December 31, 2016. On March 31, 2017, $1.5 2014 June 28, 2022 10% five 967,741 $.31 May 10, 2017, $1.0 2014 10% June 28, 2022. five 645,161 $0.31 29, 2018 1,612,902 $0.005 $500,000 Debt Issuance Costs We have capitalized certain debt issuance costs incurred in connection with the credit agreements discussed above and these costs are being amortized to interest expense over the term of the facility on a straight-line basis. The long-term portion of debt issuance costs of approximately $ 210,000 and $232,000 June 30, 2018 December 31, 2017, three six June 30, 2018 24,000 and $ 47,000 of these costs to Interest Expense. During the three six June 30, 2017 $37,000 $292,000 of these costs to Interest Expense. Due to the maturity date of the 2014 September 12, 2019 April 30, 2018, $217,000 six June 30, 2017.

Note 5 - Long-term Debt

Note 5 - Long-term Debt	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Long-term Debt [Text Block]	Note 5 – Long-Term Debt Long-term debt (excluding borrowings under our 2017 4 June 30, December 31, 2018 2017 Subordinated Promissory Note. Interest is 10% and is paid quarterly. Matures June 28, 2022 $ 1,000 $ 1,500 Subordinated Promissory Note. Interest is 10% and is paid quarterly. Matures June 28, 2022 1,000 1,000 Real Estate Loan for facility in North Dakota, interest at 3.75%, monthly principal and interest payment of $5,255 ending October 3, 2028. Collateralized by land and property purchased with the loan 279 309 Note payable to the seller of Heat Waves. The note was garnished by the Internal Revenue Service (“IRS”) in 2009 and is due on demand; paid in annual installments of $36,000 per agreement with the IRS 89 125 Total 2,368 2,934 Less debt discount (193 ) (271 ) Less current portion (142 ) (182 ) Long-term debt, net of debt discount and current portion $ 2,033 $ 2,481 Aggregate maturities of debt, (excluding borrowings under our 2017 4 ), are as follows (in thousands): Twelve Months Ending June 30, 2019 $ 142 2020 55 2021 58 2022 2,060 2023 53 Thereafter - Total $ 2,368

Note 6 - Fair Value Measurement

Note 6 - Fair Value Measurements	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 6 – 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: Fair Value Measurement Using Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value Measurement June 30 , 2018 Derivative Instrument Interest rate swap asset $ - $ 31 $ - $ 31 December 31, 2017 Derivative Instrument Warrant liability $ - $ - $ 831 $ 831 The Company's warrant liability was valued as a derivative instrument at issuance and using a combination of a Brownian Motion technique and a Lattice model, using observable market inputs and management judgment based on the following assumptions. On June 29, 2018, 1,612,902 $0.005 $500,000 The fair value of the interest rate swap is estimated using a 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 respective counterparty’s nonperformance risk in the fair value measurements, which we have concluded are not not 2. Certain assets and liabilities are measured at fair value on a nonrecurring basis. These assets and liabilities are not June 30, 2018, December 31, 2017, The Company did not 1, 2 3 three six June 30, 2018 and 2017.

Note 7 - Income Taxes

Note 7 - Income Taxes	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 7 – 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 June 30, 2018 2017 21% 34%, The computation of the annual estimated effective tax rate at each interim period requires certain estimates and significant judgment including, but not may In assessing the realization of deferred tax assets, management considers whether it is more likely than not not 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 six June 30, 2018, $32,000 six June 30, 2017, $992,000. On December 22, 2017, 35% 21%, one The Company is subject to the provisions of the Financial Accounting Standards Board (“FASB”) ASC 740 10, 118 Pursuant to the SAB118, one may 1998. 2018.

Note 8 - Commitments and Contin

Note 8 - Commitments and Contingencies	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	Note 8 – Commitments and Contingencies Operating Leases As of June 30, 2018, August 2022. Twelve Months Ending June 30 , 2019 $ 630 2020 637 2021 447 2022 356 2023 11 Thereafter - Total $ 2,081 Rent expense under operating leases, including month-to-month leases, for the three six months ended June 30, 2018 209,000 and $ 437,000 , respectively. three six months ended June 30, 2017 $191 ,000 and $405,000, Self-Insurance In June 2015, first $50,000 $1.8 The Company had an accrued liability of approximately $74 ,000 and $ 102,000 as of June 30, 2018 December 31, 2017, June 30, 2018. Effective April 1, 2015, March 31, 2018. $1.8 June 30, 2018, not December 31, 2017, June 30, 2018, $1.8 $1.8 $1.3 $505,000 June 30, 2018, April 1, 2018 , no Litigation The Company and its subsidiary Heat Waves are defendants in a stayed civil lawsuit in federal court in Colorado, Civil Action No. 1:15 00983 two ‘993 In March 2015, ‘993 ‘993 May 4, 2018, ‘993 not ‘993 July 2018, three May 4, 2018 August 6, 2018 July, In September 2016 February 2017, two ‘993 In the event that HOTF ultimately succeeds after exhausting all appeals and the ‘993 may may not

Note 9 - Stockholders' Equity

Note 9 - Stockholders' Equity	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	Note 9 – Stockholders ’ Equity Warrants In June 2016, 30,000 $0.36 one 15,000 December 21, 2016 15,000 June 21, 2017. June 30, 2018, June 21, 2021 $0.70 In June 2017, two five 1,612,902 $0.31 20 May 11, 2017. $0.19 June 28, 2017. December 31, 2017. June 29, 2018 1,612,902 $0.005 $500,000 A summary of warrant activity for the six June 30, 2018 Weighted Weighted Average Average Remaining Aggregate Exercise Contractual Intrinsic Warrants Shares Price Life (Years) Value Outstanding at December 31, 2017 1,642,902 $ 0.32 4.5 $ 539 Issued - - - - Exercised (1,612,902 ) 0.31 - - Forfeited/Cancelled - - - - Outstanding at June 30, 2018 30,000 $ 0.70 3.0 6 Exercisable at June 30, 2018 30,000 $ 0.70 3.0 6 Stock Issued for Services During the three six June 30, 2018 2017, not

Note 10 - Stock Options and Res

Note 10 - Stock Options and Restricted Stock	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Note 10 – Stock Options and Restricted Stock Stock Options On July 27, 2010, 2010 “2010 2010 15% January 1, 2016 2010 5,719,069 38,127,129 one three 5 2010 no 2010 June 30, 2018, 866,166 2010 On July 18, 2016, 2016 “2016 September 29, 2016. may 2016 8,000,000 2010 2,391,711 10,391,711 June 30, 2018, 1,766,600 2016 We have not three six June 30, 2018. six 30, 2017, 2,171,600 During the six June 30, 2018 1,230,002 options to purchase shares of Company common stock on a cashless basis resulting in the issuance of 663,938 shares. During the six June 30, 2017, no three June 30, 2018 Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at December 31 , 2017 4,814,434 $ 0.71 3.46 $ 1,007 Granted - - Exercised (1,230,002 ) - - Forfeited or Expired (951,666 ) 0.59 - Outstanding at June 30, 2018 2,632,766 $ 0.83 3.06 $ 1,058 Vested or Expected to Vest at June 30, 2018 1,951,533 $ 1.00 2.79 675 Exercisable at June 30, 2018 1,951,533 $ 1.00 2.79 $ 675 The aggregate intrinsic value in the table above represents the total intrinsic value (the difference between the estimated fair value of the Company’s common stock on June 30, 2018, June 30, 2018. During the three six June 30, 2018 61,000 and $ 134,000 , respectively, in sales, general, and administrative expenses. The Company currently expects all outstanding options to vest. Compensation cost is revised if subsequent information indicates that the actual number of options vested due to service is likely to differ from previous estimates. During the three six 30, 2017, $311,000 $446,000, A summary of the status of non-vested shares underlying the options are presented below: Number of Shares Weighted-Average Grant- Date Fair Value Non-vested at December 31, 2017 2,531,599 $ 0.24 Granted - - Vested (1,285,366 ) 0.27 Forfeited (565,000 ) 0.36 Non-vested at June 30, 2018 681,233 $ 0.21 As of June 30, 2018, 203,000 of total unrecognized compensation costs related to non-vested shares under the Company’s stock option plans which will be recognized over the remaining weighted-average period of 1.22 years. Restricted Stock Restricted shares issued pursuant to restricted stock awards under the 2016 three may not On June 14, 2018, 990,000 $1.1 A summary of the restricted stock activity is presented below: Number of Shares Weighted-Average Grant- Date Fair Value Restricted shares at December 31, 2017 - $ - Granted 990,000 0.91 Vested - - Forfeited - - Restricted shares at June 30, 2018 990,000 $ 0.91 During the three six June 30, 2018, stock-based compensation costs for restricted stock of approximately $54,000

Note 11 - Segment Reporting

Note 11 - Segment Reporting	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 11 - Segment Reporting Enservco’s reportable business segments are Well Enhancement Services, Water Transfer Services, and Water Hauling Services. These segments have been selected based on changes in management’s resource allocation and performance assessment in making decisions regarding the Company. The following is a description of the segments. Well Enhancement Services : This segment utilizes a fleet of frac water heating units, hot oil trucks and acidizing units to provide well enhancement and completion services to the domestic oil and gas industry. These services include frac water heating, hot oil services, pressure testing, and acidizing services. Water Transfer Services : This segment utilizes high and low volume pumps, lay flat hose, aluminum pipe and manifolds and related equipment to move fresh and/or recycled water from a water source such as a pond, lake, river, stream, or water storage facility to frac tanks at drilling locations to be used in connection with well completion activities. Water Hauling Services : This segment utilizes a fleet of trucks and related assets, including specialized tank trucks, vacuum trailers, storage tanks, and disposal facilities to provide various water hauling services. These services are primarily provided by Dillco in the Hugoton Field in Kansas. Unallocated and other includes general overhead expenses and assets associated with managing all reportable operating segments which have not The following tables set forth certain financial information with respect to Enservco’s reportable segments (in thousands): Well Enhancement Water Transfer Services Water Hauling Unallocated & Other Total Three Months Ended June 30, 2018: Revenues $ 7,005 $ 929 $ 858 $ - $ 8,792 Cost of Revenue 5,900 979 953 181 8,013 Segment Profit (Loss) $ 1,105 $ (50 ) $ (95 ) $ (181 ) $ 779 Depreciation and $ 1,226 $ 289 $ 77 $ 5 $ 1,597 Capital Expenditures (Excluding Acquisitions) $ 244 $ 106 $ 14 $ 1 $ 365 Three Months Ended June 30, 2017: Revenues $ 5,819 $ 306 $ 881 $ 100 $ 7,106 Cost of Revenue 4,325 616 1,192 300 $ 6,433 Segment Profit (Loss) $ 1,494 $ (310 ) $ (311 ) $ (200 ) $ 673 Depreciation and $ 1,253 $ 246 $ 168 $ 8 $ 1,675 Capital Expenditures $ 140 $ 140 $ 69 $ 1 $ 350 ( 1 Identifiable assets is calculated by summing the balances of accounts receivable, net; inventories; property and equipment, net; and other assets. Well Enhancement Water Transfer Services Water Hauling Unallocated & Other Total Six Months Ended June 30, 2018: Revenues $ 26,290 $ 1,924 $ 1,699 $ - $ 29,913 Cost of Revenue 18,991 1,936 1,901 326 23,154 Segment Profit (Loss) $ 7,299 $ (12 ) $ (202 ) $ (326 ) $ 6,759 Depreciation and $ 2,455 $ 552 $ 167 $ 12 $ 3,186 Capital Expenditures (Excluding Acquisitions) $ 786 $ 647 $ 29 $ 8 $ 1,470 Identifiable assets (1) $ 29,169 $ 3,235 $ 1,352 $ 516 $ 34,272 Six Months Ended June 30, 2017: Revenues $ 17,803 $ 1,058 $ 1,766 $ 254 $ 20,881 Cost of Revenue 12,774 1,292 2,105 641 $ 16,812 Segment Profit (Loss) $ 5,029 $ (234 ) $ (339 ) $ (387 ) $ 4,069 Depreciation and $ 2,424 $ 478 $ 333 $ 16 $ 3,251 Capital Expenditures $ 404 $ 455 $ 106 $ 6 $ 971 Identifiable assets (1) $ 30,974 $ 3,886 $ 1,932 $ 345 $ 37,137 ( 1 Identifiable assets is calculated by summing the balances of accounts receivable, net; inventories; property and equipment, net; and other assets. The following table reconciles the segment profits reported above to the income from operations reported in the consolidated statements of operations (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Segment profit $ 779 $ 673 $ 6,759 $ 4,069 Sales, general, and administrative expenses (1,241 ) (1,290 ) (2,611 ) (2,284 ) Patent litigation and defense costs (55 ) (24 ) (75 ) (67 ) Severance and transition costs (593 ) (768 ) (633 ) (768 ) Depreciation and amortization (1,597 ) (1,675 ) (3,186 ) (3,251 ) Income from Operations $ (2,707 ) $ (3,084 ) $ 254 $ (2,301 ) Geographic Areas The Company operates solely in the United States, in what it believes are three three three nine June 30, 2018 2017 Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 BY GEOGRAPHY Rocky Mountain Region (1) $ 5,600 $ 4,312 $ 18,181 $ 15,214 Central USA Region (2) 3,012 2,639 8,776 5,270 Eastern USA Region (3) 180 155 2,956 397 Total Revenues $ 8,792 $ 7,106 $ 29,913 $ 20,881 Notes to tables: ( 1 Includes the D-J Basin/Niobrara field (northeastern Colorado and southeastern Wyoming), the Powder River and Green River Basins (northeastern and southwestern Wyoming), the Bakken area (western North Dakota and eastern Montana). Heat Waves and HWWM operate in this region. ( 2 Includes the Eagle Ford Shale and Austin Chalk (southern Texas) and Mississippi Lime and Hugoton Field (southwestern Kansas, north central Oklahoma, and the Texas panhandle). Heat Waves, Dillco, and HWWM operate in this region ( 3 Consists of the southern region of the Marcellus Shale formation (southwestern Pennsylvania and northern West Virginia) and the Utica Shale formation (eastern Ohio). Heat Waves is the only Company subsidiary operating in this region.

Significant Accounting Policies

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents The Company considers all highly liquid instruments purchased with an original maturity of three may
Trade and Other Accounts Receivable, Policy [Policy Text Block]	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 uncollectible 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 June 30, 2018, December 31, 2017, 65,000 d $70,000, three 30, 2018, $1,000 six June 30, 2018 33,000 . For the three six June 30, 2017 $20 ,000 and $49,000,
Inventory, Policy [Policy Text Block]	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 net realizable value in accordance with the first first three six June 30, 2018 2017, no
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment Property and equipment consists of (i) trucks, trailers and pickups; (ii) water transfer pumps, pipe, lay flat hose, trailers, and other support equipment; (iii) real property which includes land and buildings used for office and shop facilities and wells used for the disposal of water; and (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 30 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.
Lessee, Leases [Policy Text Block]	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 ’s facility leases contain renewal clauses and expire through August 2022. June 30, 2018, December 31, 2017, 90,000 and $96,000, 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 no June 30, 2018.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	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 not No three six June 30, 2018 2017.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition As described below, we adopted Accounting Standards Update 2014 09, 606, January 1, 2018, no not 30 60 Revenue is not Revenue is recognized for certain projects that take more than one not June 30, 2018 December 31, 2017 $15,000 $1.7 Disaggregation of revenue See Note 11
Earnings Per Share, Policy [Policy Text Block]	Earnings (Loss) Per Share Earnings per Common 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 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 As of June 30, 2018, 2017 , there were outstanding stock options and warrants to acquire an aggregate of 2,662,766 and 5,749,433 , respectively, which have a potentially dilutive impact on earnings per share. As of June 30, 2018, 1.5 million. For the three six June 30, 2017, not not not not three six 30, 2018 2017.
Loan Fees and Other Deferred Costs [Policy Text Block]	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 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 June 30, 2018, 210,000 in unamortized loan fees and other deferred costs associated with the "2017 , recorded in Other Assets which we expect to charge to expense ratably over the three
Derivatives, Policy [Policy Text Block]	Derivative Instruments From 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 June 30, 2018 December 31, 2017, On February 23, 2018, 2017 $10.0 2.52%. On September 17, 2015, 2014 $10.0 1.88% 4.50% 5.50% 4.50% 5.50% In connection with the termination of the 2014 August 10, 2017, Changes in the fair value of the interest rate swap agreement were recorded in earnings. The Company was not December 31, 2017.
Income Tax, Policy [Policy Text Block]	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 not 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 50% may not Interest and penalties associated with tax positions are recorded in the period assessed as 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 2013 2017 2013 2017.
Fair Value of Financial Instruments, Policy [Policy Text Block]	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 not three six June 30, 2018 2017, The hierarchy is broken down into three Level 1: Quoted prices are available in active markets for identical assets or liabilities; Level 2: Quoted prices in active markets for similar assets and liabilities that are observable for the asset or liability; or Level 3: Unobservable pricing inputs that are generally less observable from objective sources, such as discounted cash flow models or valuations.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	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 not The Company uses a Lattice model to determine the fair value of certain warrants. The expected term used was the remaining contractual term. Expected volatility is based upon historical volatility over a term consistent with the remaining term. The risk-free interest rate is derived from the yield on 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 Company used a Monte Carlo simulation program to determine the fair value of market-based restricted stock awarded in June 2018.
Use of Estimates, Policy [Policy Text Block]	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-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.
Reclassification, Policy [Policy Text Block]	Reclassifications Certain prior-period amounts have been reclassified for comparative purposes to conform to the current presentation. These reclassifications have no
New Accounting Pronouncements, Policy [Policy Text Block]	Accounting Pronouncements In February 2016, 2016 02 842 12 December 15, 2018, one Recently Adopted In May 2014, 2014 09 July 2015, one 2015 14 December 15, 2017. 1 2016 08 2 2016 10 3 605 2016 11 4 2016 12 January 1, 2018 no In August 2016, 2016 15, 230 2016 15 one December 15, 2017 January 1, 2018 2016 15 not In January 2017, 2017 01, 805 not not 1 2 not first 2018 not In May 2017, 2017 09, 718 718. January 1, 2018, not

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Current Ownership Hierarchy [Table Text Block]	Name State of Formation Ownership Business Dillco Fluid Service, Inc. (“Dillco”) Kansas 100% by Enservco Oil and natural gas field fluid logistic services. Heat Waves Hot Oil Service LLC (“Heat Waves”) Colorado 100% by Enservco Oil and natural gas well services, including logistics and stimulation. Heat Waves Water Management LLC (“HWWM”) Colorado 100% by Enservco Water Transfer and Water Treatment Services. HE Services LLC (“HES”) Nevada 100% by Heat Waves No active business operations. Owns construction equipment used by Heat Waves. Real GC, LLC (“Real GC”) Colorado 100% by Heat Waves No active business operations. Owns real property in Garden City, Kansas that is utilized by Heat Waves.

Note 3 - Property and Equipme19

Note 3 - Property and Equipment (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Property, Plant and Equipment [Table Text Block]	June 30, December 31, 2018 2017 Trucks and vehicles $ 55,078 $ 54,925 Water transfer equipment 5,119 4,688 Other equipment 3,164 3,160 Buildings and improvements 3,551 3,551 Land 681 681 Disposal wells 391 391 Total property and equipment 67,984 67,396 Accumulated depreciation (40,528 ) (37,979 ) Property and equipment – net $ 27,456 $ 29,417

Note 5 - Long-term Debt (Tables

Note 5 - Long-term Debt (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Long-term Debt Instruments [Table Text Block]	June 30, December 31, 2018 2017 Subordinated Promissory Note. Interest is 10% and is paid quarterly. Matures June 28, 2022 $ 1,000 $ 1,500 Subordinated Promissory Note. Interest is 10% and is paid quarterly. Matures June 28, 2022 1,000 1,000 Real Estate Loan for facility in North Dakota, interest at 3.75%, monthly principal and interest payment of $5,255 ending October 3, 2028. Collateralized by land and property purchased with the loan 279 309 Note payable to the seller of Heat Waves. The note was garnished by the Internal Revenue Service (“IRS”) in 2009 and is due on demand; paid in annual installments of $36,000 per agreement with the IRS 89 125 Total 2,368 2,934 Less debt discount (193 ) (271 ) Less current portion (142 ) (182 ) Long-term debt, net of debt discount and current portion $ 2,033 $ 2,481
Schedule of Maturities of Long-term Debt [Table Text Block]	Twelve Months Ending June 30, 2019 $ 142 2020 55 2021 58 2022 2,060 2023 53 Thereafter - Total $ 2,368

Note 6 - Fair Value Measureme21

Note 6 - Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value Measurement Using Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value Measurement June 30 , 2018 Derivative Instrument Interest rate swap asset $ - $ 31 $ - $ 31 December 31, 2017 Derivative Instrument Warrant liability $ - $ - $ 831 $ 831

Note 8 - Commitments and Cont22

Note 8 - Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Twelve Months Ending June 30 , 2019 $ 630 2020 637 2021 447 2022 356 2023 11 Thereafter - Total $ 2,081

Note 9 - Stockholders' Equity (

Note 9 - Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]	Weighted Weighted Average Average Remaining Aggregate Exercise Contractual Intrinsic Warrants Shares Price Life (Years) Value Outstanding at December 31, 2017 1,642,902 $ 0.32 4.5 $ 539 Issued - - - - Exercised (1,612,902 ) 0.31 - - Forfeited/Cancelled - - - - Outstanding at June 30, 2018 30,000 $ 0.70 3.0 6 Exercisable at June 30, 2018 30,000 $ 0.70 3.0 6

Note 10 - Stock Options and R24

Note 10 - Stock Options and Restricted Stock (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at December 31 , 2017 4,814,434 $ 0.71 3.46 $ 1,007 Granted - - Exercised (1,230,002 ) - - Forfeited or Expired (951,666 ) 0.59 - Outstanding at June 30, 2018 2,632,766 $ 0.83 3.06 $ 1,058 Vested or Expected to Vest at June 30, 2018 1,951,533 $ 1.00 2.79 675 Exercisable at June 30, 2018 1,951,533 $ 1.00 2.79 $ 675
Schedule of Nonvested Share Activity [Table Text Block]	Number of Shares Weighted-Average Grant- Date Fair Value Non-vested at December 31, 2017 2,531,599 $ 0.24 Granted - - Vested (1,285,366 ) 0.27 Forfeited (565,000 ) 0.36 Non-vested at June 30, 2018 681,233 $ 0.21
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	Number of Shares Weighted-Average Grant- Date Fair Value Restricted shares at December 31, 2017 - $ - Granted 990,000 0.91 Vested - - Forfeited - - Restricted shares at June 30, 2018 990,000 $ 0.91

Note 11 - Segment Reporting (Ta

Note 11 - Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Well Enhancement Water Transfer Services Water Hauling Unallocated & Other Total Three Months Ended June 30, 2018: Revenues $ 7,005 $ 929 $ 858 $ - $ 8,792 Cost of Revenue 5,900 979 953 181 8,013 Segment Profit (Loss) $ 1,105 $ (50 ) $ (95 ) $ (181 ) $ 779 Depreciation and $ 1,226 $ 289 $ 77 $ 5 $ 1,597 Capital Expenditures (Excluding Acquisitions) $ 244 $ 106 $ 14 $ 1 $ 365 Three Months Ended June 30, 2017: Revenues $ 5,819 $ 306 $ 881 $ 100 $ 7,106 Cost of Revenue 4,325 616 1,192 300 $ 6,433 Segment Profit (Loss) $ 1,494 $ (310 ) $ (311 ) $ (200 ) $ 673 Depreciation and $ 1,253 $ 246 $ 168 $ 8 $ 1,675 Capital Expenditures $ 140 $ 140 $ 69 $ 1 $ 350 Well Enhancement Water Transfer Services Water Hauling Unallocated & Other Total Six Months Ended June 30, 2018: Revenues $ 26,290 $ 1,924 $ 1,699 $ - $ 29,913 Cost of Revenue 18,991 1,936 1,901 326 23,154 Segment Profit (Loss) $ 7,299 $ (12 ) $ (202 ) $ (326 ) $ 6,759 Depreciation and $ 2,455 $ 552 $ 167 $ 12 $ 3,186 Capital Expenditures (Excluding Acquisitions) $ 786 $ 647 $ 29 $ 8 $ 1,470 Identifiable assets (1) $ 29,169 $ 3,235 $ 1,352 $ 516 $ 34,272 Six Months Ended June 30, 2017: Revenues $ 17,803 $ 1,058 $ 1,766 $ 254 $ 20,881 Cost of Revenue 12,774 1,292 2,105 641 $ 16,812 Segment Profit (Loss) $ 5,029 $ (234 ) $ (339 ) $ (387 ) $ 4,069 Depreciation and $ 2,424 $ 478 $ 333 $ 16 $ 3,251 Capital Expenditures $ 404 $ 455 $ 106 $ 6 $ 971 Identifiable assets (1) $ 30,974 $ 3,886 $ 1,932 $ 345 $ 37,137
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 Segment profit $ 779 $ 673 $ 6,759 $ 4,069 Sales, general, and administrative expenses (1,241 ) (1,290 ) (2,611 ) (2,284 ) Patent litigation and defense costs (55 ) (24 ) (75 ) (67 ) Severance and transition costs (593 ) (768 ) (633 ) (768 ) Depreciation and amortization (1,597 ) (1,675 ) (3,186 ) (3,251 ) Income from Operations $ (2,707 ) $ (3,084 ) $ 254 $ (2,301 )
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, 2018 2017 2018 2017 BY GEOGRAPHY Rocky Mountain Region (1) $ 5,600 $ 4,312 $ 18,181 $ 15,214 Central USA Region (2) 3,012 2,639 8,776 5,270 Eastern USA Region (3) 180 155 2,956 397 Total Revenues $ 8,792 $ 7,106 $ 29,913 $ 20,881

Note 1 - Basis of Presentatio26

Note 1 - Basis of Presentation - Current Ownership Hierarchy (Details)	6 Months Ended
	Jun. 30, 2018
Dillco Fluid Service, Inc. at Kansas [Member]
Subsidiary or Equity Method Investee	100.00%
Heat Waves Hot Oil Service LLC at Colorado [Member]
Subsidiary or Equity Method Investee	100.00%
Heat Waves Water Management LLC at Colorado [Member]
Subsidiary or Equity Method Investee	100.00%
HE Services LLC at Nevada [Member]
Subsidiary or Equity Method Investee	100.00%
Real GC, LLC at Colorado [Member]
Subsidiary or Equity Method Investee	100.00%

Note 2 - Summary of Significa27

Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	Aug. 10, 2017	Sep. 17, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Feb. 23, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts Receivable, Current, Ending Balance			$ 65,000		$ 65,000			$ 70,000
Provision for Doubtful Accounts			1,000	$ 20,000	33,000	$ 49,000
Inventory Write-down			0	0	0	0
Deferred Rent Credit			90,000		90,000			96,000
Asset Impairment Charges, Total			$ 0	$ 0	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Outstanding, Number			2,662,766	5,749,433	2,662,766	5,749,433
Share-based Compensation Arrangement by Share-based Payment Award, Options and Warrants, Outstanding, Aggregate Intrinsic Value			$ 1,500,000	$ 0	$ 1,500,000	$ 0
Payments of Dividends, Total					$ 0
Earliest Tax Year [Member] | Domestic Tax Authority [Member]
Open Tax Year					2,013
Earliest Tax Year [Member] | State and Local Jurisdiction [Member]
Open Tax Year					2,013
Latest Tax Year [Member] | Domestic Tax Authority [Member]
Open Tax Year					2,017
Latest Tax Year [Member] | State and Local Jurisdiction [Member]
Open Tax Year					2,017
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative, Notional Amount							$ 10,000,000
Derivative, Fixed Interest Rate							2.52%
Interest Rate Swap [Member] | Fair Value Hedging [Member]
Derivative, Notional Amount		$ 10,000,000
Derivative, Swaption Interest Rate		1.88%
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member]
Unamortized Debt Issuance Expense			210,000		$ 210,000
Line of Credit Facility, Expiration Period					3 years
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.50%
Accounts Receivable, Net, Current [Member]
Contract with Customer, Asset, Net, Total			$ 15,000		$ 15,000			$ 1,700,000
Minimum [Member]
Property, Plant and Equipment, Useful Life					5 years
Minimum [Member] | The 2014 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		4.50%
Minimum [Member] | The 2014 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Domestic Rate Loans [Member]
Debt Instrument, Basis Spread on Variable Rate		4.50%
Maximum [Member]
Property, Plant and Equipment, Useful Life					30 years
Maximum [Member] | The 2014 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		5.50%
Maximum [Member] | The 2014 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member] | Domestic Rate Loans [Member]
Debt Instrument, Basis Spread on Variable Rate		5.50%

Note 3 - Property and Equipme28

Note 3 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property and equipment, gross	$ 67,984	$ 67,396
Accumulated depreciation	(40,528)	(37,979)
Property and equipment, net	27,456	29,417
Vehicles [Member]
Property and equipment, gross	55,078	54,925
Water Transfer Equipment [Member]
Property and equipment, gross	5,119	4,688
Property, Plant and Equipment, Other Types [Member]
Property and equipment, gross	3,164	3,160
Building and Building Improvements [Member]
Property and equipment, gross	3,551	3,551
Land [Member]
Property and equipment, gross	681	681
Disposal Wells [Member]
Property and equipment, gross	$ 391	$ 391

Note 4 - Revolving Credit Fac29

Note 4 - Revolving Credit Facilities (Details Textual)	Jun. 29, 2018USD ($)$ / sharesshares	Aug. 10, 2017USD ($)	May 10, 2017USD ($)$ / sharesshares	Mar. 31, 2017USD ($)$ / sharesshares	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Line of Credit, Current					$ 21,729,000		$ 21,729,000		$ 27,066,000
Line of Credit Assumed							49,000	$ 815,000
Line of Credit Facility, Covenant Compliance, Liquidity at Period End					7,600,000		7,600,000
Cash, Ending Balance					235,000		235,000
Interest Expense [Member]
Amortization of Debt Issuance Costs					24,000	$ 37,000	47,000	292,000
Other Assets [Member]
Unamortized Debt Issuance Expense					210,000		210,000		$ 232,000
Cross River Partners, L.P. [Member]
Class of Warrant or Right, Expiration Period			5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares			645,161
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares			$ 0.31
Proceeds from Issuance of Subordinated Long-term Debt			$ 1,000,000
Class of Warrant or Right, Exercised During Period | shares	1,612,902
Class of Warrant or Right, Exercised During Period, Exercise Price | $ / shares	$ 0.005
Proceeds from Warrant Exercises	$ 500,000
Subordinated Debt [Member]
Debt Instrument, Interest Rate, Stated Percentage				10.00%
Convertible Subordinated Debt [Member] | Cross River Partners, L.P. [Member]
Debt Instrument, Interest Rate, Stated Percentage			10.00%
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member]
Debt Instrument, Term		3 years
Line of Credit Facility, Maximum Borrowing Capacity		$ 30,000,000
Line of Credit Facility, Maximum Borrowing Capacity, Percent of Eligible Receivables		85.00%
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Trucks and Equipment		85.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.50%
Line of Credit, Current					$ 21,700,000		$ 21,700,000
Line of Credit Facility, Interest Rate at Period End					5.61%		5.61%
Line of Credit Facility, Remaining Borrowing Capacity					$ 7,400,000		$ 7,400,000
Line of Credit Facility, Covenant Compliance, Minimum Fixed Charge Coverage Ratio		1.1
Line of Credit Facility, Covenant Compliance, Trailing Twelve Month Fixed Charge Coverage Ratio		1.2
Line of Credit Facility, Covenant Compliance, Minimum Liquidity		$ 1,500,000
Line of Credit Assumed		$ 21,800,000
Unamortized Debt Issuance Expense					210,000		210,000
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		3.50%
Line of Credit, Current					21,000,000		21,000,000
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		1.75%
Line of Credit, Current					$ 729,000		$ 729,000
Line of Credit Facility, Interest Rate at Period End					6.50%		6.50%
The 2014 Credit Agreement [Member] | Warrants Purchased in Credit Agreement [Member]
Class of Warrant or Right, Expiration Period				5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares				967,741
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 0.31
The 2014 Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument, Required Funds to be Raised				$ 1,500,000
Debt Instrument, Letters of Credit Issued				1,500,000
Amortization of Debt Issuance Costs Due to Change in Maturity Date								$ 217,000
The 2014 Credit Agreement [Member] | Revolving Credit Facility [Member] | Subordinated Debt [Member]
Debt Instrument, Required Additional Funds to be Raised				$ 1,000,000

Note 5 - Long-term Debt - Summa

Note 5 - Long-term Debt - Summary of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Long-term debt, gross	$ 2,368	$ 2,934
Less debt discount	(193)	(271)
Less current portion	(142)	(182)
Long-term debt, net of debt discount and current portion	2,033	2,481
Subordinated Debt [Member] | Subordinated Promissory Note 1 [Member]
Long-term debt, gross	1,000	1,500
Subordinated Debt [Member] | Subordinated Promissory Note 2 [Member]
Long-term debt, gross	1,000	1,000
Real Estate Loan 1 [Member]
Long-term debt, gross	279	309
Note Payable To Seller Of Heat Waves [Member]
Long-term debt, gross	$ 89	$ 125

Note 5 - Long-term Debt - Sum31

Note 5 - Long-term Debt - Summary of Long-term Debt (Details) (Parentheticals) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Subordinated Debt [Member] | Subordinated Promissory Note 1 [Member]
Interest rate	10.00%	10.00%
Subordinated Debt [Member] | Subordinated Promissory Note 2 [Member]
Interest rate	10.00%	10.00%
Real Estate Loan 1 [Member]
Interest rate	3.75%	3.75%
Peridoic payment	$ 5,255	$ 5,255
Note Payable To Seller Of Heat Waves [Member]
Peridoic payment	$ 36,000	$ 36,000

Note 5 - Long-term Debt - Sum32

Note 5 - Long-term Debt - Summary of Maturities of Long-term Debt (Details) $ in Thousands	Jun. 30, 2018USD ($)
2,019	$ 142
2,020	55
2,021	58
2,022	2,060
2,023	53
Thereafter
Total	$ 2,368

Note 6 - Fair Value Measureme33

Note 6 - Fair Value Measurements (Details Textual) - Cross River Partners, L.P. [Member]	Jun. 29, 2018USD ($)$ / sharesshares
Class of Warrant or Right, Exercised During Period | shares	1,612,902
Class of Warrant or Right, Exercised During Period, Exercise Price | $ / shares	$ 0.005
Proceeds from Warrant Exercises | $	$ 500,000

Note 6 - Fair Value Measureme34

Note 6 - Fair Value Measurements - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Interest Rate Swap [Member]
Interest rate swap asset	$ 31
Warrants [Member]
Interest rate swap asset		$ 831
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Interest rate swap asset
Fair Value, Inputs, Level 1 [Member] | Warrants [Member]
Interest rate swap asset
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Interest rate swap asset	31
Fair Value, Inputs, Level 2 [Member] | Warrants [Member]
Interest rate swap asset
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Interest rate swap asset
Fair Value, Inputs, Level 3 [Member] | Warrants [Member]
Interest rate swap asset		$ 831

Note 7 - Income Taxes (Details

Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	34.00%	21.00%		35.00%
Income Tax Expense (Benefit), Total	$ 32,000	$ (1,019,000)	$ 32,000	$ (992,000)

Note 8 - Commitments and Cont36

Note 8 - Commitments and Contingencies (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Operating Leases, Rent Expense, Total		$ 209,000	$ 191,000	$ 437,000	$ 405,000
Self-insured Amount per Individual Claim	$ 50,000
Self-insured, Maximum Coverage Policy	$ 1,800,000
Self Insurance Reserve		74,000		74,000		$ 102,000
Workers' Compensation, Maximum Coverage Policy		1,800,000		1,800,000
Workers' Compensation, Accumulated Payments on Claims		1,800,000		1,800,000
Workers' Compensation, Estimated Accruals				1,300,000
Other Noncurrent Assets [Member]
Worker's Compensation, Prepaid Amount		$ 505,000		$ 505,000

Note 8 - Commitments and Cont37

Note 8 - Commitments and Contingencies - Summary of Future Minimum Operating Lease Commitments (Details) $ in Thousands	Jun. 30, 2018USD ($)
2,019	$ 630
2,020	637
2,021	447
2,022	356
2,023	11
Thereafter
Total	$ 2,081

Note 9 - Stockholders' Equity38

Note 9 - Stockholders' Equity (Details Textual) - USD ($)	Jun. 29, 2018	Jun. 21, 2017	Dec. 21, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	May 10, 2017
Stock Issued During Period, Shares, Issued for Services						0	0	0	0
Cross River Partners, L.P. [Member]
Class of Warrant or Right, Issued During Period				1,612,902
Class of Warrant or Right, Grants in Period, Grant-date Fair Value				$ 0.19
Class of Warrant or Right, Exercise Price of Warrants or Rights										$ 0.31
Warrants Expiration Period				5 years
Class of Warrant or Right, Issued During Period, Exercise Price				$ 0.31
Class of Warrant or Right, Exercised During Period	1,612,902
Class of Warrant or Right, Exercised During Period, Exercise Price	$ 0.005
Proceeds from Warrant Exercises	$ 500,000
Warrants Issued in June 2016 [Member]
Class of Warrant or Right, Issued During Period					30,000
Class of Warrant or Right, Grants in Period, Grant-date Fair Value					$ 0.36
Class of Warrants or Rights, Vesting Period					1 year
Class of Warrants or Rights, Vested During the Period		15,000	15,000
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 0.70		$ 0.70

Note 9 - Stockholders' Equity -

Note 9 - Stockholders' Equity - Summary of Warrant Activity (Details) - Warrant [Member] - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Outstanding (in shares)	1,642,902
Outstanding, weighted average exercise price (in dollars per share)	$ 0.32
Outstanding, weighted average remaining contractual life (Year)	3 years	4 years 182 days
Outstanding, aggregate intrinsic value	$ 6	$ 539
Issued (in shares)
Issued, weighted average exercise price (in dollars per share)
Issued, weighted average remaining contractual life (Year)
Issued, aggregate intrinsic value
Exercised (in shares)	(1,612,902)
Exercised, weighted average exercise price (in dollars per share)	$ 0.31
Forfeited/Cancelled (in shares)
Forfeited/Cancelled, weighted average exercise price (in dollars per share)
Outstanding (in shares)	30,000	1,642,902
Outstanding, weighted average exercise price (in dollars per share)	$ 0.70	$ 0.32
Exercisable (in shares)	30,000
Exercisable, weighted average exercise price (in dollars per share)	$ 0.70
Exercisable, weighted average remaining contractual life (Year)	3 years
Exercisable, aggregate intrinsic value	$ 6

Note 10 - Stock Options and R40

Note 10 - Stock Options and Restricted Stock (Details Textual) - USD ($)	Jun. 14, 2018	Jan. 01, 2016	Jul. 27, 2010	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Jul. 18, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance				2,632,766		2,632,766		4,814,434
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross				0		0	2,171,600
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						1,230,002	0
Stock Issued During Period Shares for Stock Options Exercised						663,938
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total				$ 203,000		$ 203,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						1 year 80 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period						990,000
Restricted Stock [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	990,000
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 1,100,000
Selling, General and Administrative Expenses [Member]
Allocated Share-based Compensation Expense, Total				61,000	$ 311,000	$ 134,000	$ 446,000
Selling, General and Administrative Expenses [Member] | Restricted Stock [Member]
Allocated Share-based Compensation Expense, Total				$ 54,000		$ 54,000
Option Plan 2010 Member
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum			15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		5,719,069		0		0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance		38,127,129		866,166		866,166
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		5 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized									2,391,711
Option Plan 2010 Member | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		1 year
Option Plan 2010 Member | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
The 2016 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant									10,391,711
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance				1,766,600		1,766,600
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized									8,000,000

Note 10 - Stock Options and R41

Note 10 - Stock Options and Restricted Stock - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Outstanding (in shares)		4,814,434
Outstanding, weighted average exercise price (in dollars per share)		$ 0.71
Outstanding, weighted average remaining contractual life (Year)		3 years 21 days		3 years 167 days
Outstanding, aggregate intrinsic value	$ 1,058	$ 1,058		$ 1,007
Granted (in shares)	0	0	2,171,600
Granted, weighted average exercise price (in dollars per share)
Exercised (in shares)		(1,230,002)	0
Exercised, weighted average exercise price (in dollars per share)
Forfeited or Expired (in shares)		(951,666)
Forfeited or Expired, weighted average exercise price (in dollars per share)		$ 0.59
Outstanding (in shares)	2,632,766	2,632,766		4,814,434
Outstanding, weighted average exercise price (in dollars per share)	$ 0.83	$ 0.83		$ 0.71
Vested or Expected to Vest (in shares)	1,951,533	1,951,533
Vested or Expected to Vest, weighted average exercise price (in dollars per share)	$ 1	$ 1
Vested or Expected to Vest, weighted average remaining contractual life (Year)		2 years 288 days
Vested or Expected to Vest, aggregate intrinsic value	$ 675	$ 675
Exercisable (in shares)	1,951,533	1,951,533
Exercisable, weighted average exercise price (in dollars per share)	$ 1	$ 1
Exercisable, weighted average remaining contractual life (Year)		2 years 288 days
Exercisable, aggregate intrinsic value	$ 675	$ 675

Note 10 - Stock Options and R42

Note 10 - Stock Options and Restricted Stock - Summary of the Status of Non-vested Shares (Details) - $ / shares	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017
Balance, non-vested (in shares)		2,531,599
Balance, non-vested, weighted average grant date fair value (in dollars per share)		$ 0.24
Granted, non-vested (in shares)	0	0	2,171,600
Granted, weighted average grant date fair value (in dollars per share)
Vested, non-vested (in shares)		(1,285,366)
Vested, weighted average grant date fair value (in dollars per share)		$ 0.27
Forfeited, non-vested (in shares)		(565,000)
Forfeited, weighted average grant date fair value (in dollars per share)		$ 0.36
Balance, non-vested (in shares)	681,233	681,233
Balance, non-vested, weighted average grant date fair value (in dollars per share)	$ 0.21	$ 0.21

Note 10 - Stock Options and R43

Note 10 - Stock Options and Restricted Stock - Summary of Restricted Stock Option (Details) - Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Balance, Restricted shares (in shares) | shares
Balance, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares
Granted, Restricted shares (in shares) | shares	990,000
Granted, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.91
Vested, Restricted shares (in shares) | shares
Vested, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares
Forfeited, Restricted shares (in shares) | shares
Forfeited, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares
Balance, Restricted shares (in shares) | shares	990,000
Balance, Restricted shares, Weighted average grant date fair value (in dollars per share) | $ / shares	$ 0.91

Note 11 - Segment Reporting - R

Note 11 - Segment Reporting - Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues		$ 8,792	$ 7,106	$ 29,913	$ 20,881
Cost of Revenue		8,013	6,433	23,154	16,812
Segment Profit (Loss)		779	673	6,759	4,069
Depreciation and amortization		1,597	1,675	3,186	3,251
Capital Expenditures (Excluding Acquisitions)		365	350	1,470	971
Identifiable assets (1)	[1]	34,272	37,137	34,272	37,137
Well Enhancement Services Segment [Member]
Revenues		7,005	5,819	26,290	17,803
Cost of Revenue		5,900	4,325	18,991	12,774
Segment Profit (Loss)		1,105	1,494	7,299	5,029
Depreciation and amortization		1,226	1,253	2,455	2,424
Capital Expenditures (Excluding Acquisitions)		244	140	786	404
Identifiable assets (1)	[1]	29,169	30,974	29,169	30,974
Water Transfer Services Segment [Member]
Revenues		929	306	1,924	1,058
Cost of Revenue		979	616	1,936	1,292
Segment Profit (Loss)		(50)	(310)	(12)	(234)
Depreciation and amortization		289	246	552	478
Capital Expenditures (Excluding Acquisitions)		106	140	647	455
Identifiable assets (1)	[1]	3,235	3,886	3,235	3,886
Water Hauling Services Segment [Member]
Revenues		858	881	1,699	1,766
Cost of Revenue		953	1,192	1,901	2,105
Segment Profit (Loss)		(95)	(311)	(202)	(339)
Depreciation and amortization		77	168	167	333
Capital Expenditures (Excluding Acquisitions)		14	69	29	106
Identifiable assets (1)	[1]	1,352	1,932	1,352	1,932
Unallocated and Other Segments [Member]
Revenues			100		254
Cost of Revenue		181	300	326	641
Segment Profit (Loss)		(181)	(200)	(326)	(387)
Depreciation and amortization		5	8	12	16
Capital Expenditures (Excluding Acquisitions)		1	1	8	6
Identifiable assets (1)	[1]	$ 516	$ 345	$ 516	$ 345
[1]	Identifiable assets is calculated by summing the balances of accounts receivable, net; inventories; property and equipment, net; and other assets.

Note 11 - Segment Reporting - I

Note 11 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment profit	$ 779	$ 673	$ 6,759	$ 4,069
Sales, general, and administrative expenses	(1,241)	(1,290)	(2,611)	(2,284)
Patent litigation and defense costs	(55)	(24)	(75)	(67)
Severance and transition costs	(593)	(768)	(633)	(768)
Depreciation and amortization	(1,597)	(1,675)	(3,186)	(3,251)
Income from Operations	$ (2,707)	$ (3,084)	$ 254	$ (2,301)

Note 11 - Segment Reporting -46

Note 11 - Segment Reporting - Revenues by Geography (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue		$ 8,792	$ 7,106	$ 29,913	$ 20,881
Rocky Mountain Region [Member]
Revenue	[1]	5,600	4,312	18,181	15,214
Central USA Region [Member]
Revenue	[2]	3,012	2,639	8,776	5,270
Eastern USA Region [Member]
Revenue	[3]	$ 180	$ 155	$ 2,956	$ 397
[1]	Includes the D-J Basin/Niobrara field (northeastern Colorado and southeastern Wyoming), the Powder River and Green River Basins (northeastern and southwestern Wyoming), the Bakken area (western North Dakota and eastern Montana). Heat Waves and HWWM operate in this region.
[2]	Includes the Eagle Ford Shale and Austin Chalk (southern Texas) and Mississippi Lime and Hugoton Field (southwestern Kansas, north central Oklahoma, and the Texas panhandle). Heat Waves, Dillco, and HWWM operate in this region
[3]	Consists of the southern region of the Marcellus Shale formation (southwestern Pennsylvania and northern West Virginia) and the Utica Shale formation (eastern Ohio). Heat Waves is the only Company subsidiary operating in this region.