Goldfield 10-K 12 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Mar. 07, 2019	Jun. 29, 2018
Document And Entity Information [Abstract] [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Entity Registrant Name	GOLDFIELD CORP
Entity Central Index Key	0000042316
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		24,522,534
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 98.6
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 11,376,373	$ 18,529,757
Accounts receivable and accrued billings	22,236,071	21,566,842
Costs and estimated earnings in excess of billings on uncompleted contracts	12,030,000	6,074,346
Income taxes receivable	1,220,527	619,552
Residential properties under construction	8,244,995	2,412,202
Prepaid expenses	634,069	993,668
Other current assets	1,835,743	1,532,110
Total current assets	57,577,778	51,728,477
Property, buildings and equipment, at cost, net of accumulated depreciation of $43,060,083 in 2018 and $38,927,654 in 2017	48,927,055	36,072,300
Deferred charges and other assets
Land and land development costs	4,680,080	4,326,728
Cash surrender value of life insurance	547,009	550,335
Restricted cash	25,980	102,027
Goodwill	101,407	101,407
Intangibles, net of accumulated amortization of $324,634 in 2018 and $263,134 in 2017	689,166	750,666
Total deferred charges and other assets	6,043,642	5,831,163
Total assets	112,548,475	93,631,940
Current liabilities
Accounts payable and accrued liabilities	15,999,157	9,379,535
Billings in excess of costs and estimated earnings on uncompleted contracts	1,165,002	166,268
Current portion of other long-term debt	113,855	0
Current portion of notes payable, net	7,161,890	6,099,787
Accrued remediation costs	60,101	87,553
Total current liabilities	24,500,005	15,733,143
Deferred income taxes	6,061,042	4,698,720
Accrued remediation costs, less current portion	436,982	434,164
Other long-term debt, less current portion, net	183,744	0
Notes payable, less current portion, net	21,731,024	16,151,567
Other accrued liabilities	30,246	66,033
Total liabilities	52,943,043	37,083,627
Commitments and contingencies (notes 4 and 8)	0	0
Stockholders’ equity
Preferred stock, $1 par value, 5,000,000 shares authorized, none issued	0	0
Common stock, $.10 par value, 40,000,000 shares authorized; 27,813,772 shares issued 24,590,243 shares outstanding in 2018 and 25,451,354 shares outstanding in 2017	2,781,377	2,781,377
Additional paid-in capital	18,481,683	18,481,683
Retained earnings	41,621,191	36,593,440
Treasury stock, 3,223,529 shares in 2018 and 2,362,418 shares in 2017, at cost	(3,278,819)	(1,308,187)
Total stockholders’ equity	59,605,432	56,548,313
Total liabilities and stockholders’ equity	$ 112,548,475	$ 93,631,940

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Property, buildings and equipment, accumulated depreciation	$ 43,060,083	$ 38,927,654
Finite-lived intangible assets, accumulated amortization	$ 324,634	$ 263,134
Preferred stock, par value (usd per share)	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value (usd per share)	$ 0.1	$ 0.1
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	27,813,772	27,813,772
Common stock, shares outstanding	24,590,243	25,451,354
Treasury stock, shares	3,223,529	2,362,418

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue
Total revenue	$ 138,148,842	$ 113,953,519
Costs and expenses
Electrical construction	113,976,157	86,714,412
Real estate development	1,012,098	3,147,791
Selling, general and administrative	7,336,475	6,611,315
Depreciation and amortization	8,436,972	7,217,901
(Gain) loss on sale of property and equipment	(176,564)	76,810
Total costs and expenses	130,585,138	103,768,229
Total operating income	7,563,704	10,185,290
Other income (expense), net
Interest income	52,288	31,696
Interest expense, net of amount capitalized	(875,646)	(665,268)
Other income, net	84,351	57,654
Total other expense, net	(739,007)	(575,918)
Income before income taxes	6,824,697	9,609,372
Income tax provision	1,796,946	1,035,997
Income from continuing operations	5,027,751	8,573,375
Loss from discontinued operations, net of income tax benefit of $0 and $164,235, respectively	0	(275,624)
Net income	$ 5,027,751	$ 8,297,751
Net income per share of common stock — basic and diluted
Continuing operations (usd per share)	$ 0.20	$ 0.34
Discontinued operations (usd per share)	0	(0.01)
Net (loss) income (usd per share)	$ 0.20	$ 0.33
Weighted average shares outstanding - basic and diluted (shares)	25,411,623	25,451,354
Electrical construction
Revenue
Total revenue	$ 136,526,511	$ 109,154,476
Real estate development
Revenue
Total revenue	$ 1,622,331	$ 4,799,043

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Loss from discontinued operations, net of income tax benefit of $0 and $164,235, respectively	$ 103,000	$ 0	$ 164,235

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 5,027,751	$ 8,297,751
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	8,436,972	7,217,901
Amortization of debt issuance costs	34,873	23,506
Deferred income taxes	1,362,322	(3,505,604)
(Gain) loss on sale of property and equipment	(176,564)	76,810
Other losses	3,326	337
Changes in operating assets and liabilities
Accounts receivable and accrued billings	(669,229)	(2,472,435)
Costs and estimated earnings in excess of billings on uncompleted contracts	(5,955,654)	1,238,753
Residential properties under construction	(5,832,793)	(860,071)
Income taxes receivable	(600,975)	(85,715)
Prepaid expenses and other assets	55,966	(130,307)
Land and land development costs	(353,352)	603,603
Accounts payable and accrued liabilities	4,512,742	(1,900,088)
Billings in excess of costs and estimated earnings on uncompleted contracts	998,734	(678,789)
Accrued remediation costs	(24,634)	306,811
Net cash provided by operating activities	6,819,485	8,132,463
Cash flows from investing activities
Proceeds from disposal of property and equipment	1,031,674	133,733
Purchases of property, buildings and equipment	(19,609,245)	(10,301,721)
Net cash used in investing activities	(18,577,571)	(10,167,988)
Cash flows from financing activities
Purchase of treasury stock	(1,970,632)	0
Proceeds from notes payable	18,275,451	22,600,000
Repayments on notes payable	(11,645,451)	(22,697,255)
Other long-term debt repayments	(107,400)	0
Debt issuance costs	(23,313)	(8,125)
Net cash provided by (used in) financing activities	4,528,655	(105,380)
Net decrease in cash, cash equivalents and restricted cash	(7,229,431)	(2,140,905)
Cash, cash equivalents and restricted cash at beginning of the year	18,631,784	20,772,689
Cash, cash equivalents and restricted cash at end of the year	11,402,353	18,631,784
Supplemental disclosure of cash flow information
Interest paid, net of amounts capitalized	805,756	621,797
Income taxes paid, net	1,035,599	4,463,081
Supplemental disclosure of non-cash investing
Liability for equipment acquired	2,235,772	57,279
Equipment funded by other long-term debt	$ 297,599	$ 0

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common stock	Additional paid-in capital	Retained earnings	Treasury stock
Balance (shares) at Dec. 31, 2016		27,813,772
Balance at Dec. 31, 2016	$ 48,250,562	$ 2,781,377	$ 18,481,683	$ 28,295,689	$ (1,308,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 8,297,751	$ 0	0	8,297,751	0
Balance (shares) at Dec. 31, 2017	25,451,354	27,813,772
Balance at Dec. 31, 2017	$ 56,548,313	$ 2,781,377	18,481,683	36,593,440	(1,308,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of stock	(1,970,632)				(1,970,632)
Net income	$ 5,027,751	$ 0	0	5,027,751	0
Balance (shares) at Dec. 31, 2018	24,590,243	27,813,772
Balance at Dec. 31, 2018	$ 59,605,432	$ 2,781,377	$ 18,481,683	$ 41,621,191	$ (3,278,819)

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Summary of Significant Accounting Policies	Organization and Summary of Significant Accounting Policies Overview The Goldfield Corporation (the “Company”) was incorporated in Wyoming in 1906 and subsequently reincorporated in Delaware in 1968. The Company’s principal line of business is the construction of electrical infrastructure for the utility industry and industrial customers. The principal market for the Company’s electrical construction operation is primarily in the Southeast, mid-Atlantic and Texas-Southwest regions of the United States. Basis of Financial Statement Presentation The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company adopted Accounting Standards Updates (“ASU”) ASU 2011-05 and ASU 2011-12, which require comprehensive income to be reported in either a single statement or in two consecutive statements reporting net income and other comprehensive income. The amendment eliminates the option to report other comprehensive income and its components in the statement of changes in stockholders’ equity. However, comprehensive income is equivalent to net income for the Company, and therefore, the Company’s accompanying financial statements do not include a Statement of Other Comprehensive Income. Cash and Cash Equivalents The Company considers highly liquid investments with maturities of three months or less when purchased to be cash equivalents. Allowance for Doubtful Accounts The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in the Company’s existing accounts receivable. The Company determines the allowance based on customer specific information and historical write-off experience. The Company reviews its allowance for doubtful accounts quarterly. Account balances are charged off against the allowance after reasonable means of collection have been exhausted and the potential for recovery is considered remote. As of both December 31, 2018 and 2017 , upon its review, management determined it was not necessary to record an allowance for doubtful accounts due to the majority of accounts receivable being generated by electrical utility customers who the Company considers creditworthy based on timely collection history and other considerations. Property, Buildings, Equipment and Depreciation Property, buildings and equipment are stated at cost. Depreciation on property, buildings and equipment is calculated on the straight-line method over the estimated useful lives of the assets. Leasehold improvements are depreciated on a straight-line basis over the shorter of the lease term, including renewals that are deemed to be reasonably assured, or the estimated useful life of the improvement. In accordance with Accounting Standard Codification (“ASC”) ASC Topic 360-10-05, Accounting for the Impairment or Disposal of Long-Lived Assets , the Company assesses the need to record impairment losses on long-lived assets when events and circumstances indicate that the carrying amount of an asset may not be recoverable. An impairment loss would be recognized when future estimated undiscounted cash flows expected to result from use of the asset are less than the asset’s carrying value. Any resulting loss would be measured at fair value based on discounted expected cash flows. Electrical Construction Revenue In May 2014, the FASB issued ASU 2014-09, ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”) , which will replace most existing revenue recognition guidance in U.S. generally accepted accounting principles and is intended to improve and converge the financial reporting requirements for revenue from contracts with customers with International Financial Reporting Standards (“IFRS”) . Subsequently Financial Accounting Standards Board (the “FASB”) issued various Accounting Standards Updates (“ASUs”) in relation to the new revenue recognition standard. The core principle of ASC 606 is that an entity should recognize revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. ASC 606 also requires additional disclosures about the nature, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. ASC 606 allows for either retrospective or cumulative effect transition methods of adoption and is effective for periods beginning after December 15, 2017 . On January 1, 2018 the Company adopted the new accounting standard ASC 606 and all the related amendments (“new revenue standard”) to all applicable contracts using the modified retrospective method (cumulative effect method). Applicable contracts did not include contracts considered substantially complete. Contracts that were modified before the beginning of the earliest period presented were not retrospectively restated. Instead, the Company reflected the aggregate effect of all modifications when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price as of the date of adoption. Adoption of the new revenue standard did not result in significant changes to the Company’s accounting policies, business processes, systems or controls, or have a material impact on its financial position, results of operations and cash flows. In addition, the Company concluded that the cumulative effect of initially applying the new revenue standard was immaterial and consequently did not record an adjustment to the opening balance of retained earnings (less than $30,000 net of tax). The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company does not expect the adoption of the new revenue standard to have a material impact to its financial position, results of operations and cash flows on an ongoing basis. The Company accepts contracts on a fixed-price, unit-price and service agreement basis. Under the new revenue standard, electrical construction fixed-price contracts previously accounted for under ASC 605-35 will be recognized over time as services are performed and the underlying obligations to customers are fulfilled. This resulted mainly in the use of input measures on a cost to cost basis similar to the practices previously in place for contracts accounted for under ASC 605-35. The Company concluded that under the new revenue standard the primary impact is on the timing of when contract modifications, variable consideration and change orders are recognized, mainly due to the application of the contract identification criteria. This resulted in timing differences on the recognition in revenue and margin when compared to prior practices. Revenue from unit-price contracts is recognized over time as services are performed and the underlying obligations to customers are fulfilled. The Company has elected to apply the practical expedient within ASC 606-10-55-18 for contracts that are routinely billed based on established man hour and equipment rates and the amounts invoiced correspond directly with the value to the customer of the Company’s performance completed to date. These contracts will be treated as a series of distinct services transferred over time and will generally result in a similar revenue pattern when compared to the prior accounting policies. Revenue from service agreements are recognized as services are performed. Revenue from service agreements are billed on either a man-hour or man-hour plus equipment basis. Terms of the Company’s service agreements may extend for periods beyond one year. The Company’s contracts allow it to bill additional amounts for change orders and claims. The Company considers a claim to be for additional work performed outside the scope of the contract and contested by the customer. Historically, claims relating to electrical construction work have not been significant. A change order is a modification to a contract that changes the provisions of the contract, typically resulting from changes in scope, specifications, design, manner of performance, facilities, equipment, materials, sites, or period of completion of the work under the contract. It is the Company’s policy to include revenue from change orders in contract value only when they can be reliably estimated and realization is considered probable. The asset, “costs and estimated earnings in excess of billings on uncompleted contracts” represents revenue recognized in excess of amounts billed. The liability, “billings in excess of costs and estimated earnings on uncompleted contracts” represents billings in excess of revenue recognized. Contract costs include all direct material, direct labor, subcontractor costs and indirect costs related to contract performance, such as supplies, tools and equipment maintenance. General and administrative costs are charged to expense as incurred. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. Changes in job performance, job conditions, estimated profitability and final contract settlements may result in revisions to costs and income and are recognized in the period in which the revisions are determined. Land and Land Development Costs and Residential Properties Under Construction The costs of a land purchase and any development expenses up to the initial construction phase of any residential property development project are recorded under the asset “land and land development costs.” Once construction commences, both the land development costs and construction costs are recorded under the asset “residential properties under construction.” The assets “land and land development costs” and “residential properties under construction” relating to specific projects are recorded as current assets when the estimated project completion date is less than one year from the date of the consolidated financial statements, or as non-current assets when the estimated project completion date is one year or more from the date of the consolidated financial statements. In accordance with ASC Topic 360-10, Accounting for the Impairment or Disposal of Long-lived Assets , land and residential properties under construction are reviewed by the Company for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. If the carrying amount or basis is not expected to be recovered, impairment losses are recorded and the related assets are adjusted to their estimated fair value. The fair value of an asset is the amount at which that asset could be bought or sold in a current transaction between willing parties, other than in a forced or liquidation sale. The Company also complies with ASC Topic 820, Fair Value Measurement , which defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. The Company did not record an impairment write-down to either of its land carrying value or residential properties under construction carrying value for either years ended December 31, 2018 or 2017 . Income Taxes The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes, which establishes the recognition requirements. Deferred tax assets and liabilities are recognized for the future tax effects attributable to temporary differences and carryforwards between the financial statement carrying amounts of existing assets and liabilities and the respective tax bases. 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 on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties related to unrecognized tax benefits as interest expense and other general and administrative expenses, respectively, and not as a component of income taxes. Executive Long-term Incentive Plan The Company has not issued shares pursuant to The Goldfield Corporation 2013 Long-term Incentive Plan (the “2013 Plan”) in either 2018 or 2017 . Therefore, the Company has no compensation expense for shares pursuant to the 2013 Plan for either of the years ended December 31, 2018 or 2017 . Use of Estimates Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these consolidated financial statements in conformity with U.S. generally accepted accounting principles. Actual results could differ from those estimates. Management considers the most significant estimates in preparing these consolidated financial statements to be the estimated costs at completion of electrical construction contracts in progress. Fair Value of Financial Instruments The Company’s financial instruments include cash and cash equivalents, accounts receivable and accrued billings, restricted cash collateral deposited with insurance carriers, cash surrender value of life insurance policies, accounts payable, notes payable, and other current liabilities. Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value guidance establishes a valuation hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are: Level 1 - Quoted market prices in active markets for identical assets or liabilities. Level 2 - Observable market based inputs or other observable inputs. Level 3 - Significant unobservable inputs that cannot be corroborated by observable market data. These values are generally determined using valuation models incorporating management’s estimates of market participant assumptions. Fair values of financial instruments are estimated through the use of public market prices, quotes from financial institutions, and other available information. Management considers the carrying amounts reported on the consolidated balance sheets for cash and cash equivalents, accounts receivable and accrued billings, accounts payable and accrued liabilities, to approximate fair value due to the immediate or short-term maturity of these financial instruments. The Company has determined the fair value of its fixed rate other long-term debt to be $292,000 using an interest rate of 4.31% (Level 2 input), which is the Company's current interest rate on borrowings. The Company’s carrying value of long-term notes payable are estimated by management to approximate fair value since the interest rates prescribed by Branch Banking and Trust Company (the “Bank”) are variable market interest rates and are adjusted periodically, and as such, are classified as Level 2. Restricted cash is considered by management to approximate fair value due to the nature of the asset held in a secured interest bearing bank account. The carrying value of cash surrender value of life insurance is also considered by management to approximate fair value as the carrying value is based on the current settlement value under the contract, as provided by the carrier and as such, is classified as Level 2. Restricted Cash The Company’s restricted cash includes cash deposited in a secured interest bearing bank account, as required by the Collateral Trust Agreement in connection with the Company’s previous workers’ compensation insurance policies, as described in note 12. Also, see note 12 for financial information regarding the immaterial impact of an ASU issued by the FASB specifically related to the disclosure of restricted cash. Goodwill and Intangible Assets Intangible assets with finite useful lives recorded in connection with a historical acquisition are amortized over the term of the related contract or useful life, as applicable. Intangible assets held by the Company with finite useful lives include customer relationships and trademarks. The Company reviews the values recorded for intangible assets and goodwill to assess recoverability from future operations annually or whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. As of December 31, 2018 , the Company assessed the recoverability of its long-lived assets and goodwill, by reviewing relevant events and circumstances to evaluate the qualitative factors in addition to the quantitative impairment test. As a result, there was no impairment of the carrying amounts of such assets. Reclassifications Certain amounts previously reflected in the prior year statement of cash flows have been reclassified to conform to the Company’s 2018 presentation. The reclassifications are associated with the adoption of ASU 2016-15 for restricted cash. Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, to increase transparency and comparability among organizations by recognizing all lease transactions (with terms in excess of 12 months) on the balance sheet as a lease liability and a right-of-use (“ROU”) asset (as defined). ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with earlier application permitted. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. The Company will use the effective date as our date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. The new standard provides a number of optional practical expedients in transition. We expect to elect the package of practical expedients, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We do not expect to elect the use-of-hindsight or the practical expedient pertaining to land easements; the latter not being applicable to us. The new standard also provides practical expedients for an entity’s ongoing accounting. We currently expect to elect the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. We also currently expect to elect the practical expedient to not separate lease and non-lease components for all of our leases. While we continue to assess all of the effects of adoption, we expect upon adoption to recognize additional operating liabilities ranging from $4 million to $5 million , with corresponding ROU assets of the same amount based on the present value of the remaining minimum rental payments under current leasing standards for existing operating leases. The Company expects the derecognition of existing deferred rent allowances to be immaterial. The Company is not anticipating material changes to either the consolidated statements of income or the consolidated statements of cash flows as a result of the adoption. The impact of this ASU is non-cash in nature, therefore the Company does not expect the adoption of this new guidance to have a material impact on the Company’s cash flows or liquidity. In August 2016, the FASB issued ASU 2016-15, which provides clarification regarding how certain cash receipts and cash payments are presented and classified in the statement of cash flows. This update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. In addition, in November 2016, the FASB issued ASU 2016-18, which requires that amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. Both updates are effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted. The Company has adopted these updates and determined there is not a material impact on its consolidated financial statements due to the adoption. The consolidated statement of cash flows for the twelve months ended December 31, 2017 , has been adjusted on the line item “ Accounts receivable and accrued billings ” to reflect an immaterial difference in the balance of cash, cash equivalents and restricted cash for the 2017 period. The Company did not make any other prior period adjustments due to the adoption of this ASU. Had the Company made the adjustment to its consolidated balance sheet as of December 31, 2017 , restricted cash would have decreased by approximately $2,300 with a corresponding increase to other receivables. This adjustment is associated with the interest income earned on the amount deposited in a trust account for the restricted cash balance. See note 12 for additional restricted cash disclosure information. In October 2016, the FASB issued ASU 2016-16, which eliminates the requirement to defer the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. Under the new guidance, an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This update is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years; early adoption is permitted and is to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings at the time of adoption. The adoption of ASU 2016-16 had no impact on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, which eliminates Step 2 of the current goodwill impairment test. A goodwill impairment loss will instead be measured at the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the recorded amount of goodwill allocated to that reporting unit. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted for any impairment test performed on testing dates after January 1, 2017. The Company is currently assessing the impact that adoption will have on its consolidated financial statements however, the Company does not expect this ASU to have a significant impact on its consolidated financial statements.

Contract Assets and Contract Li

Contract Assets and Contract Liabilities	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract Assets and Contract Liabilities	Contract Assets and Contract Liabilities On January 1, 2018 the Company adopted the new accounting standard ASC 606 and all the related amendments (“new revenue standard”) to all applicable contracts using the modified retrospective method. Applicable contracts did not include contracts considered substantially complete. Contracts that were modified before the beginning of the earliest period presented were not retrospectively restated. Instead, the Company reflected the aggregate effect of all modifications when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price as of the date of adoption. Adoption of this standard did not result in significant changes to the Company’s accounting policies, business processes, systems or controls, or have a material impact on its financial position, results of operations and cash flows. The following table presents the net contract assets and liabilities for the electrical construction operations as of the dates indicated: December 31, 2018 December 31, 2017 $ Change Contract assets (1) $ 12,030,000 $ 6,074,346 $ 5,955,654 Contract liabilities (2) (1,845,049 ) (367,552 ) (1,477,497 ) Net contract assets $ 10,184,951 $ 5,706,794 $ 4,478,157 ___________________________ (1) Contract assets consist of amounts under the caption “ Costs and estimated earnings in excess of billings on uncompleted contracts. ” (2) Contract liabilities consist of the aggregate of amounts presented under the caption “ Billings in excess of costs and estimated earnings on uncompleted contracts ” and any contract loss accruals included in “ Accounts payable and accrued liabilities. ” The amounts billed but not paid by customers pursuant to retention provisions of the electrical construction contracts were $2.2 million and $3.3 million as of December 31, 2018 and 2017 , respectively, and are included in the accompanying consolidated balance sheets in accounts receivable and accrued billings. Retainage is expected to be collected within the next twelve months. The following table presents the changes in the net contract assets and liabilities for the electrical construction operations for the twelve months ended December 31, 2018 : $ Change Cumulative adjustment due to changes in contract values (1) $ 1,877,219 Cumulative adjustment due to changes in estimated costs at completion (1,556,467 ) Revenue recognized in the period 100,224,125 Amounts reclassified to receivables (95,587,957 ) Impairment of contract assets (2) (478,763 ) Total $ 4,478,157 (1) Amount attributable to contract modifications accounted for on a cumulative catch-up basis where the customer has approved a change in the scope or price of the contract, where the modification is treated as part of the existing contract and where the remaining goods and services are not distinct. (2) Adjustment amounts due to changes in contract losses. For the year ended December 31, 2018 , $166,000 of the total revenue recognized in the current period was attributable to the contract liability billings in excess of costs and estimated earnings on uncompleted contracts’ balance as of December 31, 2017 . ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures On January 1, 2018, the Company adopted the new revenue standard ASC 606 and all the related amendments (“new revenue standard”). Adoption of this standard did not result in significant changes to the Company’s accounting policies, business processes, systems or controls, or have a material impact on its financial position, results of operations and cash flows. The Company concluded that the cumulative effect of initially applying the new revenue standard was immaterial and consequently did not record an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company does not expect the adoption of the new revenue standard to have a material impact to its financial position, results of operations and cash flows on an ongoing basis. The Company’s significant accounting policies are detailed in note 1, changes to the Company’s accounting policies as a result of adopting the new revenue standard are discussed below. To determine the proper revenue recognition method for contracts for electrical construction services, the Company evaluates whether two or more contracts should be combined and accounted for as one single contract and whether the combined or single contract should be accounted for as more than one performance obligation. This evaluation requires significant judgment and the decision to combine a group of contracts or separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. For most of the contracts, the Company provides a significant service of integrating a complex set of tasks and components into a single project or capability. Hence, the entire contract is accounted for as one performance obligation. However, less likely, if a contract is separated into more than one performance obligation, the Company allocates the total transaction price for each performance obligation in an amount based on the estimated relative stand-alone selling prices of the promised goods or services underlying each performance obligation. The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. The Company generally recognizes revenue over time as it performs because of continuous transfer of control to the customer. Because of control transferring over time, revenue is recognized based on the extent of progress towards completion of the performance obligation. The cost-to-cost measure of progress is generally used for its contracts because it best depicts the transfer of control to the customer which occurs as the Company incurs costs on the contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenue is recorded proportionally as costs are incurred. Due to the nature of the work required to be performed on many of the performance obligations, the estimation of total revenue and cost at completion is complex, subject to many variables and requires significant judgment. The Company estimates variable consideration at the most likely amount which the Company expects to receive. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. The estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of all information (historical, current and forecasted) that is reasonably available to the Company. Contracts are often modified to account for changes in contract specifications and requirements. The Company considers contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of the contract modifications are for goods or services that are not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a contract modification on the transaction price and our measure of progress for the performance obligation to which it relates is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. The Company has a standard and disciplined quarterly estimated costs at completion process in which management reviews the progress and execution of our performance obligations. Management must make assumptions and estimates regarding labor productivity and availability, the complexity of the work to be performed, the availability of materials, the length of time to complete the performance obligation (e.g., to estimate increases in wages and prices for materials and related support cost allocations), and execution by our subcontractors, among other variables. Based on this analysis, any quarterly adjustments to net revenue, cost of electrical construction revenue and the related impact to operating income are recognized as necessary in the period they become known. The following table disaggregates the Company’s revenue for the years ended December 31 as indicated: 2018 2017 Electrical construction operations (1) Southeast $ 54,123,848 $ 56,268,413 mid-Atlantic 41,071,994 29,289,385 Texas-Southwest 33,825,666 15,046,719 Other electrical construction (2) 7,505,003 8,549,959 Total 136,526,511 109,154,476 Real estate development 1,622,331 4,799,043 Total revenue $ 138,148,842 $ 113,953,519 ___________________________ (1) Principal electrical construction operations include revenue from transmission lines, distribution systems, substations and drilled pier foundations. (2) Other electrical construction includes revenue from storm work, fiber optics and other miscellaneous electrical construction items. The Company would have recognized $134,000 less revenue under legacy accounting practices for the year ended December 31, 2018 , than it did under the new revenue standard. This was attributable to the assessment of variable consideration and performance obligations within our contractual arrangements. The aggregate amount of the transaction price allocated to performance obligations that are unsatisfied as of December 31, 2018 was $36.4 million , all of which is expected to be satisfied within the next twelve months.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the President signed into law the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act significantly revises the U.S. tax code by, among other items, reducing the federal corporate tax rate from its highest rate of 35% to a single rate of 21%. Certain provisions in the Tax Act, such as providing for full expensing of certain depreciable property, the limitation on interest expense deductibility, the limitation on the deductibility of certain executive compensation and net operating loss carryforwards have had an impact on the Company and have been reflected in the consolidated financial statements for the year ended December 31, 2018. The Company has evaluated the impact of the new revenue standard under ASC 606 for tax purposes. The impact has been reported in the financial statements as of December 31, 2018 and accounted for tax purposes under deferred tax liabilities as a Section 481(a) adjustment. It is a non-automatic change in accounting method based on current Internal Revenue Service (“IRS”) regulations at this time and is subject to review and approval by the IRS. The following table presents the income tax provision from continuing operations for the years ended December 31 as indicated: 2018 2017 Current Federal $ (153,610 ) $ 3,863,151 State 597,909 558,993 444,299 4,422,144 Deferred Federal 1,779,574 (3,270,928 ) State (426,927 ) (115,219 ) 1,352,647 (3,386,147 ) Total $ 1,796,946 $ 1,035,997 The following table presents the total income tax provision for the years ended December 31 as indicated: 2018 2017 Income tax provision $ 1,796,946 $ 1,035,997 Discontinued operations — (164,235 ) Total $ 1,796,946 $ 871,762 The following table presents the temporary differences and carryforwards, which give rise to deferred tax assets and liabilities as of December 31 as indicated: 2018 2017 Deferred tax assets Accrued vacation $ 139,713 $ 113,893 Acquisition costs capitalized 55,917 58,886 Accrued remediation costs 120,493 130,168 Net operating loss carryforwards 435,121 — Sec 163(j) interest limitation 199,582 — Federal depreciation in excess of state 635,202 — Accrued payables 17,914 174,674 Percentage completed contract method for tax 1,557,437 276,413 Accrued workers’ compensation 205,150 159,237 Capitalized bidding costs 73,565 121,227 Inventory adjustments 263,680 139,565 Accrued lease expense 15,199 17,902 Accrued contract losses 164,843 50,220 Other 4,097 4,103 Total deferred tax assets 3,887,913 1,246,288 Deferred tax liabilities 481 (a) adjustment for deferred revenue (24,602 ) — Tax amortization in excess of financial statement amortization (13,378 ) (10,850 ) Tax depreciation in excess of financial statement depreciation (9,910,975 ) (5,934,158 ) Total deferred tax liabilities (9,948,955 ) (5,945,008 ) Total net deferred tax liabilities $ (6,061,042 ) $ (4,698,720 ) As of December 31, 2018 , the Company had net operating loss (“NOL”) carryforwards of approximately $2.1 million available to offset future federal taxable income. The Tax Act allows for an indefinite carryforward of the NOL to use against future taxable income, subject to a limitation of 80 percent of taxable income each year. As of December 31, 2018 , the non-current deferred tax liabilities increased to $6.1 million from $4.7 million as of December 31, 2017 primarily due to additional tax depreciation in excess of book depreciation. The Tax Act provides for the full expensing of certain depreciable property for 2018 and through 2022 and partial expensing through 2026. The carrying amounts of deferred tax assets are reduced by a valuation allowance, if based on the available evidence, it is more likely than not such 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 the deferred tax assets are expected to be recovered or settled. In the assessment for a valuation allowance, appropriate consideration is given to positive and negative evidence related to the realization of the deferred tax assets. This assessment considers, among other matters, the nature, frequency and severity of current and cumulative losses, forecasts of future profitability and tax planning alternatives. If the Company determines it will not be able to realize all or part of the deferred tax assets, a valuation allowance would be recorded to reduce deferred tax assets to the amount that is more likely than not to be realized. Based on assumptions with respect to forecasts of future taxable income and tax planning, among others, the Company anticipates being able to generate sufficient taxable income to utilize the deferred tax assets. Therefore, the Company has not recorded a valuation allowance against deferred tax assets. The minimum amount of future taxable income required to be generated to fully realize the deferred tax assets as of December 31, 2018 is approximately $13.4 million . The following table presents the differences between the Company’s effective income tax rate and the federal statutory rate on income from continuing operations for the years ended December 31 as indicated: 2018 2017 Federal statutory rate 21.0% 34.0% State tax rate, net of federal tax 3.2 3.1 Nondeductible expenses 5.4 3.6 Domestic production activities deduction — (4.0) Tax Act rate change — (26.0) Other (3.3) 0.1 Total 26.3% 10.8% The Company had gross unrecognized tax benefits of $5,000 as of both December 31, 2018 and 2017 . The Company believes that it is reasonably possible that the liability for unrecognized tax benefits related to certain state income tax matters may be settled within the next twelve months. The federal statute of limitation has expired for tax years prior to 2015 and relevant state statutes vary. The Company is currently not under any income tax audits or examinations and does not expect the assessment of any significant additional tax in excess of amounts provided. The following table presents a reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years as indicated: 2018 2017 Balance as of January 1 $ 4,723 $ 4,723 Increase from current year tax positions — — Decrease from settlements with taxing authority — — Balance as of December 31 $ 4,723 $ 4,723 The Company accrues interest and penalties related to unrecognized tax benefits as interest expense and other general and administrative expenses, respectively, and not as a component of income taxes. Decreases in interest and penalties are due to settlements with taxing authorities and expiration of statutes of limitation. During the years ended December 31, 2018 and 2017 , the Company recognized $1,000 each year in interest and penalties. The Company had accrued as a current liability $11,000 and $9,000 for the future payment of interest and penalties as of December 31, 2018 and 2017 , respectively.

Commitments and Contingencies R

Commitments and Contingencies Related to Discontinued Operations	12 Months Ended
	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Commitments and Contingencies Related to Discontinued Operations	Commitments and Contingencies Related to Discontinued Operations Discontinued operations represent former mining activities, the last of which ended in 2002. Pursuant to an agreement with the United States Environmental Protection Agency (the “EPA”), the Company performed certain remediation actions at a property sold over fifty years ago. This remediation work was completed by September 30, 2015. As of December 31, 2018 and 2017 , the Company has established a contingency provision related to discontinued operations, which was $497,000 and $522,000 , respectively. No change to the provision was required for either of the three or twelve month periods ended December 31, 2018 . For the three and twelve month periods ended December 31, 2017 , the Company increased the provision $275,000 and $440,000 ( $172,000 and $276,000 , net of tax benefit of $103,000 and $164,000 , respectively). This increase resulted mainly from changes in the scope of the project as required by the EPA and the state of Washington. The remaining balance of the accrued remediation costs as of December 31, 2018 , mainly represents estimated future charges for EPA response costs and monitoring and provisions for potential future remediation efforts of the property as required by the state of Washington. The total costs to be incurred in future periods may vary from this estimate. The amounts recorded in the aforementioned contingency provision are not discounted. The provision will be reviewed periodically based upon facts and circumstances available at the time.

Property, Buildings and Equipme

Property, Buildings and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Buildings and Equipment	Property, Buildings and Equipment The following table presents the balances of major classes of properties as of December 31 as indicated: Estimated useful lives in years 2018 2017 Land — $ 670,400 $ 530,221 Land improvements 7 - 15 537,175 495,484 Buildings and improvements 5 - 40 2,767,603 2,588,053 Leasehold improvements 5 - 39 254,385 252,646 Machinery and equipment 2 - 10 87,734,262 70,892,181 Construction in progress — 23,313 241,369 Total 91,987,138 74,999,954 Less accumulated depreciation 43,060,083 38,927,654 Net properties, buildings and equipment $ 48,927,055 $ 36,072,300 Management reviews the net carrying value of all properties, buildings and equipment on a regular basis to assess and determine whether trigger events of impairment exist and the need for possible impairments. As a result of such review, no impairment write-down was considered necessary for the years ended December 31, 2018 and 2017 .

401 (k) Employee Benefits Plan

401 (k) Employee Benefits Plan	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
401 (k) Employee Benefits Plan	401(k) Employee Benefits Plan Effective January 1, 1995, the Company adopted The Goldfield Corporation and Subsidiaries Employee Savings and Retirement Plan, a defined contribution plan that qualifies under Section 401(k) of the Internal Revenue Code. The plan provides retirement benefits to all employees who meet eligibility requirements and elect to participate. Under the plan, participating employees may defer up to 75% of their pre-tax compensation per calendar year subject to Internal Revenue Code limits. The Company’s contributions to the plan are discretionary and amounted to approximately $258,000 and $297,000 for the years ended December 31, 2018 and 2017 , respectively.

Notes Payable

Notes Payable	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Notes Payable	Notes Payable The following table presents the balances of our notes payables as of December 31 as indicated: Branch Banking and Trust Company Maturity Date 2018 2017 Interest Rates 2018 2017 Working Capital Loan November 28, 2020 $ 5,000,000 $ — 4.31 % — % $27.49 Million Equipment Loan (previously $22.6 Million Equipment Loan) May 1, 2022 23,920,000 19,540,000 4.31 % 3.25 % Previous Working Capital Loan — 2,750,000 — % 3.38 % Total notes payable 28,920,000 22,290,000 Less unamortized debt issuance costs 27,086 38,646 Total notes payable, net 28,892,914 22,251,354 Less current portion of notes payable, net 7,161,890 6,099,787 Notes payable net, less current portion $ 21,731,024 $ 16,151,567 As of December 31, 2018 , the Company, and the Company’s wholly owned subsidiaries Southeast Power, Pineapple House of Brevard, Inc. (“Pineapple House”), Bayswater Development Corporation (“Bayswater”), Power Corporation of America (“PCA”) Precision Foundations, Inc. (“PFI”) and C and C Power Line, Inc. (“C&C”), collectively (the “Debtors,”) were parties to a Master Loan Agreement, dated May 24, 2018 (the “2018 Master Loan Agreement”), with Branch Banking and Trust Company (the “Bank”). The 2018 Master Loan Agreement restates substantially the same terms and conditions as those set forth in the previous Master Loan Agreement (the “Previous Master Loan Agreement”) among the Debtors and the Bank, originally entered into on June 9, 2017, except for the update in the exhibit for the loan modification and the new Working Capital Loan described below and an increase in the permissible outside debt and leases amount from $500,000 in the Previous Master Loan Agreement to $2.0 million . As of December 31, 2018 , the Company had a promissory note and a series of related ancillary agreements with the Bank providing for a revolving line of credit loan for a maximum principal amount of $18.0 million , to be used as a “ Working Capital Loan ” (the “Working Capital Loan”). The Company entered into the Working Capital Loan on May 24, 2018, the Working Capital Loan restates and replaces all previous renewals and or modifications on the previous working capital loan entered into on August 26, 2005 (the “Previous Working Capital Loan”) on substantially the same terms and conditions as those set forth in the Previous Working Capital Loan. Borrowings of $2.78 million, outstanding as of May 24, 2018, from the Working Capital Loan were used to pay in full the outstanding amount of the Previous Working Capital Loan, plus accrued interest and loan closing costs. As of December 31, 2018 , borrowings under the Working Capital Loan were $5.0 million . As of December 31, 2018 and December 31, 2017 , borrowings under the Previous Working Capital Loan were zero and $2.8 million , respectively. As a credit guaranty to the Bank, the Company is contingently liable for the guaranty of a subsidiary obligation under an irrevocable letter of credit related to workers’ compensation. The amount of this letter of credit was $575,000 and $420,000 as of December 31, 2018 and December 31, 2017 , respectively. On January 1, 2018, the Company had a loan agreement with the Bank for a $22.6 Million equipment loan (the “ $22.6 Million Equipment Loan”). The $22.6 Million Equipment Loan between the Company and the Bank was modified on May 24, 2018 increasing the principal amount to $27.49 Million (the “ $27.49 Million Equipment Loan”). Borrowings of $16.99 million, outstanding as of May 24, 2018, plus accrued interest, under the $22.6 Million Equipment Loan were continued under the $27.49 Million Equipment Loan. The remaining portion of the $27.49 Million Equipment Loan balance was drawn by the Company for equipment purchases that were made after January 1, 2018. As of December 31, 2018 , the Company had a loan agreement with the Bank for the $27.49 Million Equipment Loan. Under the documentation related to the $27.49 Million Equipment Loan, principal payments in the amount of $510,000 plus accrued interest commenced on June 9, 2018 and continued monthly thereafter until and including the payment due on December 9, 2018. On December 31, 2018 , the outstanding principal balance of the $27.49 Million Equipment Loan was amortized over a forty (40) month period. Equal monthly payments of principal in the amount of $598,000 plus accrued interest commenced on January 9, 2019 and will continue monthly on the same day of each month thereafter, with all outstanding principal, accrued interest, and all other amounts then due and owing to be payable on May 1, 2022, its maturity date. As of December 31, 2018 , the Debtors had a loan agreement with the Bank under the 2018 Master Loan Agreement for the $27.49 Million Equipment Loan (previously $22.6 Million Equipment Loan) , and the Working Capital Loan , which are guaranteed by the Debtors and includes the grant of a continuing security interest in all now owned and after acquired and wherever located personal property of the Debtors. The $27.49 Million Equipment Loan (previously $22.6 Million Equipment Loan) and the Working Capital Loan bear interest at a rate per annum equal to one month LIBOR (as defined in the documentation related to each loan) plus 1.80% , which will be adjusted monthly and subject to a maximum rate as described in the documentation related to each loan. Subsequently, on March 7, 2019 , the Company, the Debtors and the Bank entered into a First Amendment to the 2018 Master Loan Agreement (the “Amendment”). The Amendment provides an exhibit which lists new loans, or modifications of loans, which will be governed by the 2018 Master Loan Agreement and which were also entered into on March 7, 2019 . Also, on March 7, 2019 , the Company, the Debtors and the Bank entered into a modification of the $27.49 Million Equipment Loan, increasing it to a $38.2 million equipment loan (as increased, the “ $38.2 Million Equipment Loan ”) and a new $4.5 million equipment promissory note (the “ $4.5 Million Equipment Note ”). Borrowings of $22.7 million , outstanding as of March 7, 2019 , plus accrued interest under the $27.49 Million Equipment Loan will continue under the $38.2 Million Equipment Loan . The $15.5 million balance remaining on the $38.2 Million Equipment Loan was drawn by the Company on March 8, 2019 for equipment purchases that were made on or after August 1, 2018. Under the documentation related to the $38.2 Million Equipment Loan , principal payments of $598,000 plus accrued interest will commence on March 9, 2019 and continue monthly thereafter until and including the payment due on December 9, 2019. On January 9, 2020, equal monthly principal payments of $650,000 , plus accrued interest, will commence and continue monthly thereafter on the same day of each month until the March 9, 2024 maturity date. Under the documentation related to the $4.5 Million Equipment Note , borrowings will be made only for the purchase of equipment currently held by the Company under Master Lease Agreements and will not exceed the cost of the lease buy-out. Interest only payments on any amounts drawn will commence on April 7, 2019, and continue monthly on the same day through and including the payment due on March 7, 2020. Thereafter, principal payments of $93,750 plus accrued interest will commence on April 7, 2020, and continue monthly thereafter until and including the payment due on March 7, 2024. The Company’s debt arrangements contain various financial and other covenants including, but not limited to: minimum tangible net worth, maximum debt to tangible net worth ratio and fixed charge coverage ratio. Other loan covenants prohibit, among other things, a change in legal form of the Company, and entering into a merger or consolidation. The loans also have cross-default provisions whereby any default under any loans of the Company (or its subsidiaries) with the Bank, will constitute a default under all of the other loans of the Company (and its subsidiaries) with the Bank. The schedule of payments of the notes payable as of December 31, 2018 is as follows: 2019 $ 7,176,000 2020 12,176,000 2021 7,176,000 2022 2,392,000 Total payments of notes payable $ 28,920,000 Other Long Term Debt As of December 31, 2018 , the Company had an equipment purchase loan agreement for a specialty piece of equipment to be used in the Company’s electrical construction operations in the amount of $405,000 plus interest and sales tax. The agreement requires monthly payments of $10,687 plus interest at a 5.85% fixed rate. The loan matures on June 14, 2021 and there are no early payment provisions. The schedule of payments of the other long term debt as of December 31, 2018 is as follows: 2019 $ 113,855 2020 120,697 2021 63,047 2022 — Total payments of other long term debt $ 297,599

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases The Company leases its principal office space under a nine -year operating lease. Within the provisions of the office lease, there are escalations in payments over the base lease term, as well as renewal periods and cancellation provisions. The effects of the escalations have been reflected in rent expense on a straight-line basis over the expected lease term. In addition, the Company leases other office spaces as principal offices for our subsidiaries PCA, PFI and C&C. The Company also leases office equipment under operating leases that expire over the next four years. The Company’s leases require payments of property taxes, insurance and maintenance costs in addition to the lease payments. Additionally, the Company leases several off-site storage facilities, used to store equipment and materials, under a month to month lease arrangement. Lastly, the Company has several lease agreements to lease certain equipment from time to time over a 60 -month term. The leased equipment is used in our electrical construction operations. The Company recognizes rent expense on a straight-line basis over the expected lease term. Future minimum lease payments under operating leases having initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2018 are as follows: 2019 $ 3,613,980 2020 910,778 2021 88,469 2022 and beyond 114,466 Total minimum operating lease payments $ 4,727,693 Total expense for the operating leases were $4.7 million and $4.7 million for the years ended December 31, 2018 and 2017 , respectively. Performance Bonds In certain circumstances, the Company is required to provide performance bonds to secure its contractual commitments. Management is not aware of any performance bond issued for the Company that has ever been called by a customer. As of December 31, 2018 , outstanding performance bonds issued on behalf of the Company’s electrical construction subsidiaries amounted to approximately $46.4 million . Collective Bargaining Agreements C&C, one of the Company’s electrical construction subsidiaries, is party to collective bargaining agreements with unions representing workers performing field construction operations. The collective bargaining agreements expire at various times and have typically been renegotiated and renewed on terms similar to the ones contained in the expiring agreements. The agreements require the subsidiary to pay specified wages, provide certain benefits to their respective union employees and contribute certain amounts to multi-employer pension plans and employee benefit trusts. The subsidiary’s multi-employer pension plan contribution rates generally are specified in the collective bargaining agreements (usually on an annual basis), and contributions are made to the plans on a “pay-as-you-go” basis based on such subsidiary’s union employee payrolls, which cannot be determined for future periods because contributions depend on, among other things, the number of union employees that such subsidiary employs at any given time; the plans in which it may participate vary depending on the projects it has ongoing at any time; and the need for union resources in connection with those projects. If the subsidiary withdraws from, or otherwise terminates its participation in, one or more multi-employer pension plans, or if the plans were to otherwise become substantially underfunded, such subsidiary could be assessed liabilities for additional contributions related to the underfunding of these plans. The Company is not aware of any amounts of withdrawal liability that have been incurred as a result of a withdrawal by C&C from any multi-employer defined benefit pension plans. Multi-employer Pension Plans The Company contributes to a multi-employer pension plan on behalf of employees covered by collective bargaining agreements. These plans are administered jointly by management and union representatives and cover substantially all full-time and certain part-time union employees who are not covered by other plans. The risks of participating in multi-employer plans are different from single-employer plans in the following aspects: (1) assets contributed to the multi-employer plan by one employer may be used to provide benefits to employees of other participating employers, (2) if a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers, and (3) if the Company chooses to stop participating in a multi-employer plan, we could, under certain circumstances, be liable for unfunded vested benefits or other expenses of jointly administered union/management plans. At this time, we have not established any liabilities because withdrawal from these plans is not probable. For the years ended December 31, 2018 and 2017 , the contributions to these plans were $227,000 and $180,000 , respectively. The Company’s participation in multi-employer pension plans is outlined in the table below. The EIN column provides the Employer Identification Number (“EIN”) of the plan. Unless otherwise noted, the most recent Pension Protection Act zone status available in 2018 and 2017 is for the plan’s year ended December 31, 2018 , and 2017 , respectively. The zone status is based on information that the Company received from the plan, and is certified by the plan’s actuary. Among other factors, plans in the red zone are generally less than 65% funded, plans in the yellow zone are less than 80% funded, and plans in the green zone are at least 80% funded. The “FIP” column indicates plans for which a financial improvement plan (“FIP”) is either pending or has been implemented. The last column lists the expiration date(s) of the collective-bargaining agreement(s) to which the plans are subject. There have been no significant changes in the number of Company employees covered by the multi-employer plans or other significant events that would impact the comparability of contributions to the plans. Information about the Plan is publicly available on Form 5500, Annual Return / Report of Employee Benefit Plan. The Plan year-end is December 31st and no single employer contributes 5% or more of total plan contributions. Certified Zone Status Plan Name: EIN Number Plan Number 2018 2017 FIP Implemented Surcharge Imposed Expiration Date of Collective Bargaining Agreement National Electrical Benefit Fund 53-0181657 001 Green Green Not applicable (green-zone plan) Not applicable (green-zone plan) August 31, 2019 Committed Expenditures The Company from time to time commits to various contractual agreements that secure future rights to goods, services and other items to be used in the normal course of operations. These commitments include capital equipment purchases, sub-contractor services for the construction of residential properties and land purchases for the future construction of residential properties. The Company’s committed expenditures as of December 31, 2018 , totaled $3,813,623 all of which is expected to be completed in 2019. Legal Proceedings The Company is involved in various legal claims arising in the ordinary course of business. The Company has concluded that the ultimate disposition of these matters should not have a material adverse effect on the Company’s consolidated financial position, results of operations, or liquidity.

Income Per Share of Common Stoc

Income Per Share of Common Stock	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Income Per Share of Common Stock	Income Per Share of Common Stock Basic income per common share is computed by dividing net income by the weighted average number of common stock shares outstanding during the period. Diluted income per share reflects the potential dilution that could occur if common stock equivalents, such as stock options outstanding, were exercised into common stock that subsequently shared in the earnings of the Company. As of December 31, 2018 and 2017 , the Company had no common stock equivalents. The computation of the weighted average number of common stock shares outstanding excludes 3,223,529 and 2,362,418 shares of Treasury Stock for the years ended December 31, 2018 and 2017 , respectively.

Common Stock Repurchase Plan

Common Stock Repurchase Plan	12 Months Ended
	Dec. 31, 2018
Common Stock Repurchase Plan [Abstract]
Common Stock Repurchase Plan	Common Stock Repurchase Plan The Company has had a stock repurchase plan since September 17, 2002 , when the Board of Directors approval was announced. As last amended by the Board of Directors on September 13, 2018 , this plan permits the purchase of up to 3,500,000 shares. There is currently available for purchase through September 30, 2019 , a maximum of 293,829 shares. The Company may repurchase its shares either in the open market or through private transactions. The volume of the shares to be repurchased is contingent upon market conditions and other factors. During the year ended December 31, 2018 , 861,111 shares were purchased at a cost of $1,970,632 (average cost of $2.29 per share), no shares were repurchased during the year ended December 31, 2017 . As of December 31, 2018 , the total number of shares repurchased under the Repurchase Plan was 3,206,171 at a cost of $3,260,098 (average cost of $1.02 per share). The Company currently holds the repurchased stock as Treasury Stock, reported at cost. Prior to September 17, 2002 , the Company had 17,358 shares of Treasury Stock that it had purchased at a cost of $18,720 . Subsequently, on March 7, 2019 , the Company’s Board of Directors extended the Company’s Common Stock Repurchase plan from September 30, 2019 until September 30, 2020 and increased the number of shares available for purchase under the plan. The plan previously authorized the repurchase of up to 3,500,000 shares, of which 3,273,880 have been repurchased as of March 7, 2019 . The revised plan will permit an additional 2,500,000 shares to be repurchased, increasing the amount available for repurchase to 2,726,120 shares as of March 7, 2019 .

Business Segment, Business Cred

Business Segment, Business Credit Risks and Concentration	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Business Segment, Business Credit Risks and Concentration	Business Segment, Business Credit Risks and Concentration Segment The Company is currently involved in two segments, electrical construction and real estate development. There were no material amounts of sales or transfers between segments and no material amounts of foreign sales. Any inter-segment sales have been eliminated. The following table sets forth certain segment information as of December 31 for the years indicated: Continuing Operations 2018 2017 Revenue Electrical construction $ 136,526,511 $ 109,154,476 Real estate development 1,622,331 4,799,043 Total revenue 138,148,842 113,953,519 Operating expenses Electrical construction 123,914,953 95,463,721 Real estate development 1,924,835 4,177,558 Corporate 4,745,350 4,126,950 Total operating expenses 130,585,138 103,768,229 Operating income (loss) Electrical construction 12,611,558 13,690,755 Real estate development (302,504 ) 621,485 Corporate (4,745,350 ) (4,126,950 ) Total operating income 7,563,704 10,185,290 Other income (expenses), net Electrical construction (761,117 ) (562,233 ) Real estate development (56,010 ) (71,945 ) Corporate 78,120 58,260 Total other expenses, net (739,007 ) (575,918 ) Net income (loss) before taxes Electrical construction 11,850,441 13,128,522 Real estate development (358,514 ) 549,540 Corporate (4,667,230 ) (4,068,690 ) Total net income before taxes $ 6,824,697 $ 9,609,372 Identifiable Assets Electrical construction $ 93,642,412 $ 78,745,673 Real estate development 16,444,209 8,713,310 Corporate 2,461,854 6,172,957 Total $ 112,548,475 $ 93,631,940 Capital Expenditures Electrical construction $ 19,514,124 $ 10,191,515 Real estate development 42,545 1,065 Corporate 52,576 109,141 Total $ 19,609,245 $ 10,301,721 Depreciation and Amortization Electrical construction $ 8,319,362 $ 7,086,361 Real estate development 21,279 15,207 Corporate 96,331 116,333 Total $ 8,436,972 $ 7,217,901 Credit Risks Financial instruments, mainly within the electrical construction operations, which potentially subject the Company to concentrations of credit risk, consist principally of accounts receivable and accrued billings in the amounts of $22.2 million and $21.6 million as of December 31, 2018 and 2017 , respectively, which management reviews to assess the need to establish an allowance for doubtful accounts. Cash and Cash Equivalents The Company holds cash on deposit in U.S. banks, in excess of Federal Deposit Insurance Corporation insurance limits. The Company has not experienced and does not anticipate any losses in any such accounts. The Company mitigates this risk by doing business with well capitalized, quality financial institutions. Customer Concentration Revenue (in thousands of dollars) to customers exceeding 10% of the Company’s total revenue for the years ended December 31 as indicated are as follows: 2018 2017 Amount % of Total revenue Amount % of Total revenue Electrical construction operations Customer A $ 39,866 29 $ 38,306 34 Customer B 22,085 16 16,912 15 Customer C 16,972 12 11,681 10 Revenue by service/product (in thousands of dollars) for the years ended December 31 as indicated are as follows: 2018 2017 Amount % of Total revenue Amount % of Total revenue Electrical construction Principal electrical construction operations (1) $ 129,022 93 $ 100,604 88 Other electrical construction (2) 7,505 6 8,550 8 Total 136,527 99 109,154 96 Real estate development 1,622 1 4,799 4 Total revenue $ 138,149 100 $ 113,953 100 ___________________________ (1) Principal electrical construction operations include revenue from transmission lines, distribution systems, substations and drilled pier foundations. (2) Other electrical construction includes revenue from storm work, fiber optics and other miscellaneous electrical construction items as disclosed in the revenue disaggregation reported in note 14. The total of the above categories may differ from the sum of the components due to rounding.

Restricted Cash

Restricted Cash	12 Months Ended
	Dec. 31, 2018
Restricted Cash and Investments [Abstract]
Restricted Cash	Restricted Cash Restricted cash, reported under “Deferred charges and other assets” on the Company’s consolidated balance sheet, represents amounts deposited in a trust account to secure the Company’s obligations in connection with the Company’s previous workers’ compensation insurance policies. The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheet that sum to the total of the same such amounts shown in the statement of cash flows as of the dates indicated: December 31, 2018 December 31, 2017 Cash and cash equivalents $ 11,376,373 $ 18,529,757 Restricted cash 25,980 102,027 Cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows $ 11,402,353 $ 18,631,784

ASC 606 Revenue Recognition and

ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures	Contract Assets and Contract Liabilities On January 1, 2018 the Company adopted the new accounting standard ASC 606 and all the related amendments (“new revenue standard”) to all applicable contracts using the modified retrospective method. Applicable contracts did not include contracts considered substantially complete. Contracts that were modified before the beginning of the earliest period presented were not retrospectively restated. Instead, the Company reflected the aggregate effect of all modifications when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price as of the date of adoption. Adoption of this standard did not result in significant changes to the Company’s accounting policies, business processes, systems or controls, or have a material impact on its financial position, results of operations and cash flows. The following table presents the net contract assets and liabilities for the electrical construction operations as of the dates indicated: December 31, 2018 December 31, 2017 $ Change Contract assets (1) $ 12,030,000 $ 6,074,346 $ 5,955,654 Contract liabilities (2) (1,845,049 ) (367,552 ) (1,477,497 ) Net contract assets $ 10,184,951 $ 5,706,794 $ 4,478,157 ___________________________ (1) Contract assets consist of amounts under the caption “ Costs and estimated earnings in excess of billings on uncompleted contracts. ” (2) Contract liabilities consist of the aggregate of amounts presented under the caption “ Billings in excess of costs and estimated earnings on uncompleted contracts ” and any contract loss accruals included in “ Accounts payable and accrued liabilities. ” The amounts billed but not paid by customers pursuant to retention provisions of the electrical construction contracts were $2.2 million and $3.3 million as of December 31, 2018 and 2017 , respectively, and are included in the accompanying consolidated balance sheets in accounts receivable and accrued billings. Retainage is expected to be collected within the next twelve months. The following table presents the changes in the net contract assets and liabilities for the electrical construction operations for the twelve months ended December 31, 2018 : $ Change Cumulative adjustment due to changes in contract values (1) $ 1,877,219 Cumulative adjustment due to changes in estimated costs at completion (1,556,467 ) Revenue recognized in the period 100,224,125 Amounts reclassified to receivables (95,587,957 ) Impairment of contract assets (2) (478,763 ) Total $ 4,478,157 (1) Amount attributable to contract modifications accounted for on a cumulative catch-up basis where the customer has approved a change in the scope or price of the contract, where the modification is treated as part of the existing contract and where the remaining goods and services are not distinct. (2) Adjustment amounts due to changes in contract losses. For the year ended December 31, 2018 , $166,000 of the total revenue recognized in the current period was attributable to the contract liability billings in excess of costs and estimated earnings on uncompleted contracts’ balance as of December 31, 2017 . ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures On January 1, 2018, the Company adopted the new revenue standard ASC 606 and all the related amendments (“new revenue standard”). Adoption of this standard did not result in significant changes to the Company’s accounting policies, business processes, systems or controls, or have a material impact on its financial position, results of operations and cash flows. The Company concluded that the cumulative effect of initially applying the new revenue standard was immaterial and consequently did not record an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company does not expect the adoption of the new revenue standard to have a material impact to its financial position, results of operations and cash flows on an ongoing basis. The Company’s significant accounting policies are detailed in note 1, changes to the Company’s accounting policies as a result of adopting the new revenue standard are discussed below. To determine the proper revenue recognition method for contracts for electrical construction services, the Company evaluates whether two or more contracts should be combined and accounted for as one single contract and whether the combined or single contract should be accounted for as more than one performance obligation. This evaluation requires significant judgment and the decision to combine a group of contracts or separate the combined or single contract into multiple performance obligations could change the amount of revenue and profit recorded in a given period. For most of the contracts, the Company provides a significant service of integrating a complex set of tasks and components into a single project or capability. Hence, the entire contract is accounted for as one performance obligation. However, less likely, if a contract is separated into more than one performance obligation, the Company allocates the total transaction price for each performance obligation in an amount based on the estimated relative stand-alone selling prices of the promised goods or services underlying each performance obligation. The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. The Company generally recognizes revenue over time as it performs because of continuous transfer of control to the customer. Because of control transferring over time, revenue is recognized based on the extent of progress towards completion of the performance obligation. The cost-to-cost measure of progress is generally used for its contracts because it best depicts the transfer of control to the customer which occurs as the Company incurs costs on the contracts. Under the cost-to-cost measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Revenue is recorded proportionally as costs are incurred. Due to the nature of the work required to be performed on many of the performance obligations, the estimation of total revenue and cost at completion is complex, subject to many variables and requires significant judgment. The Company estimates variable consideration at the most likely amount which the Company expects to receive. The Company includes estimated amounts in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. The estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of all information (historical, current and forecasted) that is reasonably available to the Company. Contracts are often modified to account for changes in contract specifications and requirements. The Company considers contract modifications to exist when the modification either creates new or changes the existing enforceable rights and obligations. Most of the contract modifications are for goods or services that are not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as if they were part of that existing contract. The effect of a contract modification on the transaction price and our measure of progress for the performance obligation to which it relates is recognized as an adjustment to revenue (either as an increase in or a reduction of revenue) on a cumulative catch-up basis. The Company has a standard and disciplined quarterly estimated costs at completion process in which management reviews the progress and execution of our performance obligations. Management must make assumptions and estimates regarding labor productivity and availability, the complexity of the work to be performed, the availability of materials, the length of time to complete the performance obligation (e.g., to estimate increases in wages and prices for materials and related support cost allocations), and execution by our subcontractors, among other variables. Based on this analysis, any quarterly adjustments to net revenue, cost of electrical construction revenue and the related impact to operating income are recognized as necessary in the period they become known. The following table disaggregates the Company’s revenue for the years ended December 31 as indicated: 2018 2017 Electrical construction operations (1) Southeast $ 54,123,848 $ 56,268,413 mid-Atlantic 41,071,994 29,289,385 Texas-Southwest 33,825,666 15,046,719 Other electrical construction (2) 7,505,003 8,549,959 Total 136,526,511 109,154,476 Real estate development 1,622,331 4,799,043 Total revenue $ 138,148,842 $ 113,953,519 ___________________________ (1) Principal electrical construction operations include revenue from transmission lines, distribution systems, substations and drilled pier foundations. (2) Other electrical construction includes revenue from storm work, fiber optics and other miscellaneous electrical construction items. The Company would have recognized $134,000 less revenue under legacy accounting practices for the year ended December 31, 2018 , than it did under the new revenue standard. This was attributable to the assessment of variable consideration and performance obligations within our contractual arrangements. The aggregate amount of the transaction price allocated to performance obligations that are unsatisfied as of December 31, 2018 was $36.4 million , all of which is expected to be satisfied within the next twelve months.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets Associated with the Acquisition of C&C	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets Associated with the Acquisition of C&C	Goodwill and Other Intangible Assets Associated with the Acquisition of C&C The Company performed an annual impairment assessment on its goodwill and intangible assets on December 31, 2018 . Based upon this analysis, the Company determined that there were no impairments. The following table presents the gross and net balances of our goodwill and intangible assets as of the dates indicated: December 31, 2018 December 31, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Goodwill Indefinite $ 101,407 $ — $ 101,407 $ 101,407 $ — $ 101,407 Trademarks/Names 15 $ 640,000 $ (213,334 ) $ 426,666 $ 640,000 $ (170,670 ) $ 469,330 Customer relationships 20 350,000 (87,500 ) 262,500 350,000 (70,000 ) 280,000 Non-competition agreement 5 10,000 (10,000 ) — 10,000 (8,664 ) 1,336 Other 1 13,800 (13,800 ) — 13,800 (13,800 ) — Total $ 1,013,800 $ (324,634 ) $ 689,166 $ 1,013,800 $ (263,134 ) $ 750,666 Amortization of definite-lived intangible assets will be approximately $60,000 annually for 2019 through 2023 .

Organization and Summary of S_2

Organization and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Overview and Basis of Financial Statement Presentation	Overview The Goldfield Corporation (the “Company”) was incorporated in Wyoming in 1906 and subsequently reincorporated in Delaware in 1968. The Company’s principal line of business is the construction of electrical infrastructure for the utility industry and industrial customers. The principal market for the Company’s electrical construction operation is primarily in the Southeast, mid-Atlantic and Texas-Southwest regions of the United States. Basis of Financial Statement Presentation The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company adopted Accounting Standards Updates (“ASU”) ASU 2011-05 and ASU 2011-12, which require comprehensive income to be reported in either a single statement or in two consecutive statements reporting net income and other comprehensive income. The amendment eliminates the option to report other comprehensive income and its components in the statement of changes in stockholders’ equity. However, comprehensive income is equivalent to net income for the Company, and therefore, the Company’s accompanying financial statements do not include a Statement of Other Comprehensive Income.
Cash, Cash Equivalents and Restricted Cash	Restricted Cash The Company’s restricted cash includes cash deposited in a secured interest bearing bank account, as required by the Collateral Trust Agreement in connection with the Company’s previous workers’ compensation insurance policies, as described in note 12. Also, see note 12 for financial information regarding the immaterial impact of an ASU issued by the FASB specifically related to the disclosure of restricted cash. Cash and Cash Equivalents The Company considers highly liquid investments with maturities of three months or less when purchased to be cash equivalents.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in the Company’s existing accounts receivable. The Company determines the allowance based on customer specific information and historical write-off experience. The Company reviews its allowance for doubtful accounts quarterly. Account balances are charged off against the allowance after reasonable means of collection have been exhausted and the potential for recovery is considered remote. As of both December 31, 2018 and 2017 , upon its review, management determined it was not necessary to record an allowance for doubtful accounts due to the majority of accounts receivable being generated by electrical utility customers who the Company considers creditworthy based on timely collection history and other considerations.
Property, Buildings, Equipment and Depreciation	Property, Buildings, Equipment and Depreciation Property, buildings and equipment are stated at cost. Depreciation on property, buildings and equipment is calculated on the straight-line method over the estimated useful lives of the assets. Leasehold improvements are depreciated on a straight-line basis over the shorter of the lease term, including renewals that are deemed to be reasonably assured, or the estimated useful life of the improvement. In accordance with Accounting Standard Codification (“ASC”) ASC Topic 360-10-05, Accounting for the Impairment or Disposal of Long-Lived Assets , the Company assesses the need to record impairment losses on long-lived assets when events and circumstances indicate that the carrying amount of an asset may not be recoverable. An impairment loss would be recognized when future estimated undiscounted cash flows expected to result from use of the asset are less than the asset’s carrying value. Any resulting loss would be measured at fair value based on discounted expected cash flows.
Electrical Construction Revenue	Electrical Construction Revenue In May 2014, the FASB issued ASU 2014-09, ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”) , which will replace most existing revenue recognition guidance in U.S. generally accepted accounting principles and is intended to improve and converge the financial reporting requirements for revenue from contracts with customers with International Financial Reporting Standards (“IFRS”) . Subsequently Financial Accounting Standards Board (the “FASB”) issued various Accounting Standards Updates (“ASUs”) in relation to the new revenue recognition standard. The core principle of ASC 606 is that an entity should recognize revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. ASC 606 also requires additional disclosures about the nature, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. ASC 606 allows for either retrospective or cumulative effect transition methods of adoption and is effective for periods beginning after December 15, 2017 . On January 1, 2018 the Company adopted the new accounting standard ASC 606 and all the related amendments (“new revenue standard”) to all applicable contracts using the modified retrospective method (cumulative effect method). Applicable contracts did not include contracts considered substantially complete. Contracts that were modified before the beginning of the earliest period presented were not retrospectively restated. Instead, the Company reflected the aggregate effect of all modifications when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price as of the date of adoption. Adoption of the new revenue standard did not result in significant changes to the Company’s accounting policies, business processes, systems or controls, or have a material impact on its financial position, results of operations and cash flows. In addition, the Company concluded that the cumulative effect of initially applying the new revenue standard was immaterial and consequently did not record an adjustment to the opening balance of retained earnings (less than $30,000 net of tax). The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The Company does not expect the adoption of the new revenue standard to have a material impact to its financial position, results of operations and cash flows on an ongoing basis. The Company accepts contracts on a fixed-price, unit-price and service agreement basis. Under the new revenue standard, electrical construction fixed-price contracts previously accounted for under ASC 605-35 will be recognized over time as services are performed and the underlying obligations to customers are fulfilled. This resulted mainly in the use of input measures on a cost to cost basis similar to the practices previously in place for contracts accounted for under ASC 605-35. The Company concluded that under the new revenue standard the primary impact is on the timing of when contract modifications, variable consideration and change orders are recognized, mainly due to the application of the contract identification criteria. This resulted in timing differences on the recognition in revenue and margin when compared to prior practices. Revenue from unit-price contracts is recognized over time as services are performed and the underlying obligations to customers are fulfilled. The Company has elected to apply the practical expedient within ASC 606-10-55-18 for contracts that are routinely billed based on established man hour and equipment rates and the amounts invoiced correspond directly with the value to the customer of the Company’s performance completed to date. These contracts will be treated as a series of distinct services transferred over time and will generally result in a similar revenue pattern when compared to the prior accounting policies. Revenue from service agreements are recognized as services are performed. Revenue from service agreements are billed on either a man-hour or man-hour plus equipment basis. Terms of the Company’s service agreements may extend for periods beyond one year. The Company’s contracts allow it to bill additional amounts for change orders and claims. The Company considers a claim to be for additional work performed outside the scope of the contract and contested by the customer. Historically, claims relating to electrical construction work have not been significant. A change order is a modification to a contract that changes the provisions of the contract, typically resulting from changes in scope, specifications, design, manner of performance, facilities, equipment, materials, sites, or period of completion of the work under the contract. It is the Company’s policy to include revenue from change orders in contract value only when they can be reliably estimated and realization is considered probable. The asset, “costs and estimated earnings in excess of billings on uncompleted contracts” represents revenue recognized in excess of amounts billed. The liability, “billings in excess of costs and estimated earnings on uncompleted contracts” represents billings in excess of revenue recognized. Contract costs include all direct material, direct labor, subcontractor costs and indirect costs related to contract performance, such as supplies, tools and equipment maintenance. General and administrative costs are charged to expense as incurred. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. Changes in job performance, job conditions, estimated profitability and final contract settlements may result in revisions to costs and income and are recognized in the period in which the revisions are determined.
Land and Land Development Costs and Residential Properties Under Construction	Land and Land Development Costs and Residential Properties Under Construction The costs of a land purchase and any development expenses up to the initial construction phase of any residential property development project are recorded under the asset “land and land development costs.” Once construction commences, both the land development costs and construction costs are recorded under the asset “residential properties under construction.” The assets “land and land development costs” and “residential properties under construction” relating to specific projects are recorded as current assets when the estimated project completion date is less than one year from the date of the consolidated financial statements, or as non-current assets when the estimated project completion date is one year or more from the date of the consolidated financial statements. In accordance with ASC Topic 360-10, Accounting for the Impairment or Disposal of Long-lived Assets , land and residential properties under construction are reviewed by the Company for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. If the carrying amount or basis is not expected to be recovered, impairment losses are recorded and the related assets are adjusted to their estimated fair value. The fair value of an asset is the amount at which that asset could be bought or sold in a current transaction between willing parties, other than in a forced or liquidation sale. The Company also complies with ASC Topic 820, Fair Value Measurement , which defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. The Company did not record an impairment write-down to either of its land carrying value or residential properties under construction carrying value for either years ended December 31, 2018 or 2017 .
Income Taxes	Income Taxes The Company accounts for income taxes in accordance with ASC Topic 740, Income Taxes, which establishes the recognition requirements. Deferred tax assets and liabilities are recognized for the future tax effects attributable to temporary differences and carryforwards between the financial statement carrying amounts of existing assets and liabilities and the respective tax bases. 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 on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company records interest and penalties related to unrecognized tax benefits as interest expense and other general and administrative expenses, respectively, and not as a component of income taxes.
Executive Long-term Incentive Plan	Executive Long-term Incentive Plan The Company has not issued shares pursuant to The Goldfield Corporation 2013 Long-term Incentive Plan (the “2013 Plan”) in either 2018 or 2017 . Therefore, the Company has no compensation expense for shares pursuant to the 2013 Plan for either of the years ended December 31, 2018 or 2017 .
Use of Estimates	Use of Estimates Management of the Company has made a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities to prepare these consolidated financial statements in conformity with U.S. generally accepted accounting principles. Actual results could differ from those estimates. Management considers the most significant estimates in preparing these consolidated financial statements to be the estimated costs at completion of electrical construction contracts in progress.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s financial instruments include cash and cash equivalents, accounts receivable and accrued billings, restricted cash collateral deposited with insurance carriers, cash surrender value of life insurance policies, accounts payable, notes payable, and other current liabilities. Fair value is the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value guidance establishes a valuation hierarchy, which requires maximizing the use of observable inputs when measuring fair value. The three levels of inputs that may be used are: Level 1 - Quoted market prices in active markets for identical assets or liabilities. Level 2 - Observable market based inputs or other observable inputs. Level 3 - Significant unobservable inputs that cannot be corroborated by observable market data. These values are generally determined using valuation models incorporating management’s estimates of market participant assumptions. Fair values of financial instruments are estimated through the use of public market prices, quotes from financial institutions, and other available information. Management considers the carrying amounts reported on the consolidated balance sheets for cash and cash equivalents, accounts receivable and accrued billings, accounts payable and accrued liabilities, to approximate fair value due to the immediate or short-term maturity of these financial instruments. The Company has determined the fair value of its fixed rate other long-term debt to be $292,000 using an interest rate of 4.31% (Level 2 input), which is the Company's current interest rate on borrowings. The Company’s carrying value of long-term notes payable are estimated by management to approximate fair value since the interest rates prescribed by Branch Banking and Trust Company (the “Bank”) are variable market interest rates and are adjusted periodically, and as such, are classified as Level 2. Restricted cash is considered by management to approximate fair value due to the nature of the asset held in a secured interest bearing bank account. The carrying value of cash surrender value of life insurance is also considered by management to approximate fair value as the carrying value is based on the current settlement value under the contract, as provided by the carrier and as such, is classified as Level 2.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Intangible assets with finite useful lives recorded in connection with a historical acquisition are amortized over the term of the related contract or useful life, as applicable. Intangible assets held by the Company with finite useful lives include customer relationships and trademarks. The Company reviews the values recorded for intangible assets and goodwill to assess recoverability from future operations annually or whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. As of December 31, 2018 , the Company assessed the recoverability of its long-lived assets and goodwill, by reviewing relevant events and circumstances to evaluate the qualitative factors in addition to the quantitative impairment test. As a result, there was no impairment of the carrying amounts of such assets.
Reclassifications	Reclassifications Certain amounts previously reflected in the prior year statement of cash flows have been reclassified to conform to the Company’s 2018 presentation. The reclassifications are associated with the adoption of ASU 2016-15 for restricted cash.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, to increase transparency and comparability among organizations by recognizing all lease transactions (with terms in excess of 12 months) on the balance sheet as a lease liability and a right-of-use (“ROU”) asset (as defined). ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with earlier application permitted. A modified retrospective transition approach is required, applying the new standard to all leases existing at the date of initial application. An entity may choose to use either (1) its effective date or (2) the beginning of the earliest comparative period presented in the financial statements as its date of initial application. The Company will use the effective date as our date of initial application. Consequently, financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. The new standard provides a number of optional practical expedients in transition. We expect to elect the package of practical expedients, which permits us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We do not expect to elect the use-of-hindsight or the practical expedient pertaining to land easements; the latter not being applicable to us. The new standard also provides practical expedients for an entity’s ongoing accounting. We currently expect to elect the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, we will not recognize ROU assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. We also currently expect to elect the practical expedient to not separate lease and non-lease components for all of our leases. While we continue to assess all of the effects of adoption, we expect upon adoption to recognize additional operating liabilities ranging from $4 million to $5 million , with corresponding ROU assets of the same amount based on the present value of the remaining minimum rental payments under current leasing standards for existing operating leases. The Company expects the derecognition of existing deferred rent allowances to be immaterial. The Company is not anticipating material changes to either the consolidated statements of income or the consolidated statements of cash flows as a result of the adoption. The impact of this ASU is non-cash in nature, therefore the Company does not expect the adoption of this new guidance to have a material impact on the Company’s cash flows or liquidity. In August 2016, the FASB issued ASU 2016-15, which provides clarification regarding how certain cash receipts and cash payments are presented and classified in the statement of cash flows. This update addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. In addition, in November 2016, the FASB issued ASU 2016-18, which requires that amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. Both updates are effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted. The Company has adopted these updates and determined there is not a material impact on its consolidated financial statements due to the adoption. The consolidated statement of cash flows for the twelve months ended December 31, 2017 , has been adjusted on the line item “ Accounts receivable and accrued billings ” to reflect an immaterial difference in the balance of cash, cash equivalents and restricted cash for the 2017 period. The Company did not make any other prior period adjustments due to the adoption of this ASU. Had the Company made the adjustment to its consolidated balance sheet as of December 31, 2017 , restricted cash would have decreased by approximately $2,300 with a corresponding increase to other receivables. This adjustment is associated with the interest income earned on the amount deposited in a trust account for the restricted cash balance. See note 12 for additional restricted cash disclosure information. In October 2016, the FASB issued ASU 2016-16, which eliminates the requirement to defer the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. Under the new guidance, an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This update is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years; early adoption is permitted and is to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings at the time of adoption. The adoption of ASU 2016-16 had no impact on the Company’s consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, which eliminates Step 2 of the current goodwill impairment test. A goodwill impairment loss will instead be measured at the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the recorded amount of goodwill allocated to that reporting unit. The provisions of this ASU are effective for years beginning after December 15, 2019, with early adoption permitted for any impairment test performed on testing dates after January 1, 2017. The Company is currently assessing the impact that adoption will have on its consolidated financial statements however, the Company does not expect this ASU to have a significant impact on its consolidated financial statements.

Contract Assets and Contract _2

Contract Assets and Contract Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset and Liability	The following table presents the net contract assets and liabilities for the electrical construction operations as of the dates indicated: December 31, 2018 December 31, 2017 $ Change Contract assets (1) $ 12,030,000 $ 6,074,346 $ 5,955,654 Contract liabilities (2) (1,845,049 ) (367,552 ) (1,477,497 ) Net contract assets $ 10,184,951 $ 5,706,794 $ 4,478,157 ___________________________ (1) Contract assets consist of amounts under the caption “ Costs and estimated earnings in excess of billings on uncompleted contracts. ” (2) Contract liabilities consist of the aggregate of amounts presented under the caption “ Billings in excess of costs and estimated earnings on uncompleted contracts ” and any contract loss accruals included in “ Accounts payable and accrued liabilities. ” The amounts billed but not paid by customers pursuant to retention provisions of the electrical construction contracts were $2.2 million and $3.3 million as of December 31, 2018 and 2017 , respectively, and are included in the accompanying consolidated balance sheets in accounts receivable and accrued billings. Retainage is expected to be collected within the next twelve months. The following table presents the changes in the net contract assets and liabilities for the electrical construction operations for the twelve months ended December 31, 2018 : $ Change Cumulative adjustment due to changes in contract values (1) $ 1,877,219 Cumulative adjustment due to changes in estimated costs at completion (1,556,467 ) Revenue recognized in the period 100,224,125 Amounts reclassified to receivables (95,587,957 ) Impairment of contract assets (2) (478,763 ) Total $ 4,478,157 (1) Amount attributable to contract modifications accounted for on a cumulative catch-up basis where the customer has approved a change in the scope or price of the contract, where the modification is treated as part of the existing contract and where the remaining goods and services are not distinct. (2) Adjustment amounts due to changes in contract losses.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of income tax provision	The following table presents the income tax provision from continuing operations for the years ended December 31 as indicated: 2018 2017 Current Federal $ (153,610 ) $ 3,863,151 State 597,909 558,993 444,299 4,422,144 Deferred Federal 1,779,574 (3,270,928 ) State (426,927 ) (115,219 ) 1,352,647 (3,386,147 ) Total $ 1,796,946 $ 1,035,997 The following table presents the total income tax provision for the years ended December 31 as indicated: 2018 2017 Income tax provision $ 1,796,946 $ 1,035,997 Discontinued operations — (164,235 ) Total $ 1,796,946 $ 871,762
Schedule of deferred tax assets and liabilities	The following table presents the temporary differences and carryforwards, which give rise to deferred tax assets and liabilities as of December 31 as indicated: 2018 2017 Deferred tax assets Accrued vacation $ 139,713 $ 113,893 Acquisition costs capitalized 55,917 58,886 Accrued remediation costs 120,493 130,168 Net operating loss carryforwards 435,121 — Sec 163(j) interest limitation 199,582 — Federal depreciation in excess of state 635,202 — Accrued payables 17,914 174,674 Percentage completed contract method for tax 1,557,437 276,413 Accrued workers’ compensation 205,150 159,237 Capitalized bidding costs 73,565 121,227 Inventory adjustments 263,680 139,565 Accrued lease expense 15,199 17,902 Accrued contract losses 164,843 50,220 Other 4,097 4,103 Total deferred tax assets 3,887,913 1,246,288 Deferred tax liabilities 481 (a) adjustment for deferred revenue (24,602 ) — Tax amortization in excess of financial statement amortization (13,378 ) (10,850 ) Tax depreciation in excess of financial statement depreciation (9,910,975 ) (5,934,158 ) Total deferred tax liabilities (9,948,955 ) (5,945,008 ) Total net deferred tax liabilities $ (6,061,042 ) $ (4,698,720 )
Reconciliation of effective and statutory tax rates from continuing operations	The following table presents the differences between the Company’s effective income tax rate and the federal statutory rate on income from continuing operations for the years ended December 31 as indicated: 2018 2017 Federal statutory rate 21.0% 34.0% State tax rate, net of federal tax 3.2 3.1 Nondeductible expenses 5.4 3.6 Domestic production activities deduction — (4.0) Tax Act rate change — (26.0) Other (3.3) 0.1 Total 26.3% 10.8%
Reconciliation of beginning and ending unrecognized tax benefits	The following table presents a reconciliation of the beginning and ending amounts of unrecognized tax benefits for the years as indicated: 2018 2017 Balance as of January 1 $ 4,723 $ 4,723 Increase from current year tax positions — — Decrease from settlements with taxing authority — — Balance as of December 31 $ 4,723 $ 4,723

Property, Buildings and Equip_2

Property, Buildings and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Property, Buildings and Equipment	The following table presents the balances of major classes of properties as of December 31 as indicated: Estimated useful lives in years 2018 2017 Land — $ 670,400 $ 530,221 Land improvements 7 - 15 537,175 495,484 Buildings and improvements 5 - 40 2,767,603 2,588,053 Leasehold improvements 5 - 39 254,385 252,646 Machinery and equipment 2 - 10 87,734,262 70,892,181 Construction in progress — 23,313 241,369 Total 91,987,138 74,999,954 Less accumulated depreciation 43,060,083 38,927,654 Net properties, buildings and equipment $ 48,927,055 $ 36,072,300

Notes Payable (Tables)

Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of long-term debt	The following table presents the balances of our notes payables as of December 31 as indicated: Branch Banking and Trust Company Maturity Date 2018 2017 Interest Rates 2018 2017 Working Capital Loan November 28, 2020 $ 5,000,000 $ — 4.31 % — % $27.49 Million Equipment Loan (previously $22.6 Million Equipment Loan) May 1, 2022 23,920,000 19,540,000 4.31 % 3.25 % Previous Working Capital Loan — 2,750,000 — % 3.38 % Total notes payable 28,920,000 22,290,000 Less unamortized debt issuance costs 27,086 38,646 Total notes payable, net 28,892,914 22,251,354 Less current portion of notes payable, net 7,161,890 6,099,787 Notes payable net, less current portion $ 21,731,024 $ 16,151,567
Schedule of debt maturity payments	The schedule of payments of the notes payable as of December 31, 2018 is as follows: 2019 $ 7,176,000 2020 12,176,000 2021 7,176,000 2022 2,392,000 Total payments of notes payable $ 28,920,000 The schedule of payments of the other long term debt as of December 31, 2018 is as follows: 2019 $ 113,855 2020 120,697 2021 63,047 2022 — Total payments of other long term debt $ 297,599

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Future minimum lease payments under operating leases	Future minimum lease payments under operating leases having initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2018 are as follows: 2019 $ 3,613,980 2020 910,778 2021 88,469 2022 and beyond 114,466 Total minimum operating lease payments $ 4,727,693
Schedule of multi-employer pension plans	Certified Zone Status Plan Name: EIN Number Plan Number 2018 2017 FIP Implemented Surcharge Imposed Expiration Date of Collective Bargaining Agreement National Electrical Benefit Fund 53-0181657 001 Green Green Not applicable (green-zone plan) Not applicable (green-zone plan) August 31, 2019

Business Segment, Business Cr_2

Business Segment, Business Credit Risk and Concentration (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following table sets forth certain segment information as of December 31 for the years indicated: Continuing Operations 2018 2017 Revenue Electrical construction $ 136,526,511 $ 109,154,476 Real estate development 1,622,331 4,799,043 Total revenue 138,148,842 113,953,519 Operating expenses Electrical construction 123,914,953 95,463,721 Real estate development 1,924,835 4,177,558 Corporate 4,745,350 4,126,950 Total operating expenses 130,585,138 103,768,229 Operating income (loss) Electrical construction 12,611,558 13,690,755 Real estate development (302,504 ) 621,485 Corporate (4,745,350 ) (4,126,950 ) Total operating income 7,563,704 10,185,290 Other income (expenses), net Electrical construction (761,117 ) (562,233 ) Real estate development (56,010 ) (71,945 ) Corporate 78,120 58,260 Total other expenses, net (739,007 ) (575,918 ) Net income (loss) before taxes Electrical construction 11,850,441 13,128,522 Real estate development (358,514 ) 549,540 Corporate (4,667,230 ) (4,068,690 ) Total net income before taxes $ 6,824,697 $ 9,609,372 Identifiable Assets Electrical construction $ 93,642,412 $ 78,745,673 Real estate development 16,444,209 8,713,310 Corporate 2,461,854 6,172,957 Total $ 112,548,475 $ 93,631,940 Capital Expenditures Electrical construction $ 19,514,124 $ 10,191,515 Real estate development 42,545 1,065 Corporate 52,576 109,141 Total $ 19,609,245 $ 10,301,721 Depreciation and Amortization Electrical construction $ 8,319,362 $ 7,086,361 Real estate development 21,279 15,207 Corporate 96,331 116,333 Total $ 8,436,972 $ 7,217,901
Schedule of Concentration Risk	Revenue (in thousands of dollars) to customers exceeding 10% of the Company’s total revenue for the years ended December 31 as indicated are as follows: 2018 2017 Amount % of Total revenue Amount % of Total revenue Electrical construction operations Customer A $ 39,866 29 $ 38,306 34 Customer B 22,085 16 16,912 15 Customer C 16,972 12 11,681 10 Revenue by service/product (in thousands of dollars) for the years ended December 31 as indicated are as follows: 2018 2017 Amount % of Total revenue Amount % of Total revenue Electrical construction Principal electrical construction operations (1) $ 129,022 93 $ 100,604 88 Other electrical construction (2) 7,505 6 8,550 8 Total 136,527 99 109,154 96 Real estate development 1,622 1 4,799 4 Total revenue $ 138,149 100 $ 113,953 100 ___________________________ (1) Principal electrical construction operations include revenue from transmission lines, distribution systems, substations and drilled pier foundations. (2) Other electrical construction includes revenue from storm work, fiber optics and other miscellaneous electrical construction items as disclosed in the revenue disaggregation reported in note 14.

Restricted Cash Restricted Cash

Restricted Cash Restricted Cash (Tables)	12 Months Ended
	Dec. 31, 2018
Restricted Cash and Investments [Abstract]
Restrictions on Cash and Cash Equivalents	The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheet that sum to the total of the same such amounts shown in the statement of cash flows as of the dates indicated: December 31, 2018 December 31, 2017 Cash and cash equivalents $ 11,376,373 $ 18,529,757 Restricted cash 25,980 102,027 Cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows $ 11,402,353 $ 18,631,784

ASC 606 Revenue Recognition a_2

ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table disaggregates the Company’s revenue for the years ended December 31 as indicated: 2018 2017 Electrical construction operations (1) Southeast $ 54,123,848 $ 56,268,413 mid-Atlantic 41,071,994 29,289,385 Texas-Southwest 33,825,666 15,046,719 Other electrical construction (2) 7,505,003 8,549,959 Total 136,526,511 109,154,476 Real estate development 1,622,331 4,799,043 Total revenue $ 138,148,842 $ 113,953,519 ___________________________ (1) Principal electrical construction operations include revenue from transmission lines, distribution systems, substations and drilled pier foundations. (2) Other electrical construction includes revenue from storm work, fiber optics and other miscellaneous electrical construction items.

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets Associated with the Acquisition of C&C (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table presents the gross and net balances of our goodwill and intangible assets as of the dates indicated: December 31, 2018 December 31, 2017 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Goodwill Indefinite $ 101,407 $ — $ 101,407 $ 101,407 $ — $ 101,407 Trademarks/Names 15 $ 640,000 $ (213,334 ) $ 426,666 $ 640,000 $ (170,670 ) $ 469,330 Customer relationships 20 350,000 (87,500 ) 262,500 350,000 (70,000 ) 280,000 Non-competition agreement 5 10,000 (10,000 ) — 10,000 (8,664 ) 1,336 Other 1 13,800 (13,800 ) — 13,800 (13,800 ) — Total $ 1,013,800 $ (324,634 ) $ 689,166 $ 1,013,800 $ (263,134 ) $ 750,666

Organization and Summary of S_3

Organization and Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jan. 01, 2019USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Maximum service period term (in years)	1 year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Decrease in restricted cash	$ (25,980)	$ (102,027)
Long-term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	0	0
Fixed Rate Long-term Installment Notes Payable | Notes payable
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt, fair value	$ 292,000
Fixed Rate Long-term Installment Notes Payable | Notes payable | Discount Rate
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value measurement input, debt	0.0431
ASU 2016-15
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Decrease in restricted cash		2,300
Retained earnings | ASU 2014-09
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cumulative effect of new accounting principle		$ 30,000
Forecast | Minimum | ASU 2016-02
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Operating lease liability			$ 4,000,000
Right-of-use assets			4,000,000
Forecast | Maximum | ASU 2016-02
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Operating lease liability			5,000,000
Right-of-use assets			$ 5,000,000

Contract Assets and Contract _3

Contract Assets and Contract Liabilities - Summary of Contract Assets and Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Contract assets	$ 12,030,000	$ 6,074,346
Change in contract assets	5,955,654
Contract liabilities	(1,845,049)	(367,552)
Change in contract liabilities	(1,477,497)
Net contract assets	10,184,951	$ 5,706,794
Total	$ 4,478,157

Contract Assets and Contract _4

Contract Assets and Contract Liabilities - Changes in Contract Assets and Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Cumulative adjustment due to changes in contract values	$ 1,877,219
Cumulative adjustment due to changes in estimated costs at completion	(1,556,467)
Revenue recognized in the period	100,224,125
Amounts reclassified to receivables	(95,587,957)
Impairment of contract assets	(478,763)
Total	4,478,157
Billings in excess of costs and estimated earnings on uncompleted contracts	$ 1,165,002	$ 166,268

Contract Assets and Contract _5

Contract Assets and Contract Liabilities - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Amounts billed but not yet paid pursuant to retention provisions	$ 2.2	$ 3.3

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Net operating loss carryforward	$ 2,100,000
Non-current deferred tax liability	6,061,042	$ 4,698,720
Minimum amount of future taxable income required to realize deferred tax assets	13,400,000
Unrecognized tax benefits	4,723	4,723	$ 4,723
Income tax interest and penalties expensed during period	1,000	1,000
Accrued income tax interest and penalties	$ 11,000	$ 9,000

Income Taxes - Components for I

Income Taxes - Components for Income Tax Provision From Continuing Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current
Federal	$ (153,610)	$ 3,863,151
State	597,909	558,993
Current Total	444,299	4,422,144
Deferred
Federal	1,779,574	(3,270,928)
State	(426,927)	(115,219)
Deferred Total	1,352,647	(3,386,147)
Total	$ (1,796,946)	$ (1,035,997)

Income Taxes - Components of In

Income Taxes - Components of Income Tax Provision (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax provision		$ 1,796,946	$ 1,035,997
Discontinued operations	$ (103,000)	0	(164,235)
Total		$ 1,796,946	$ 871,762

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets
Accrued vacation	$ 139,713	$ 113,893
Acquisition costs capitalized	55,917	58,886
Accrued remediation costs	120,493	130,168
Net operating loss carryforwards	435,121	0
Accrued payables	17,914	174,674
Sec 163(j) interest limitation	199,582	0
Federal depreciation in excess of state	635,202	0
Percentage completed contract method for tax	1,557,437	276,413
Accrued workers’ compensation	205,150	159,237
Capitalized bidding costs	73,565	121,227
Inventory adjustments	263,680	139,565
Accrued lease expense	15,199	17,902
Accrued contract losses	164,843	50,220
Other	4,097	4,103
Total deferred tax assets	3,887,913	1,246,288
Deferred tax liabilities
481 (a) adjustment for deferred revenue	(24,602)	0
Tax amortization in excess of financial statement amortization	(13,378)	(10,850)
Tax depreciation in excess of financial statement depreciation	(9,910,975)	(5,934,158)
Total deferred tax liabilities	(9,948,955)	(5,945,008)
Total net deferred tax liabilities	$ (6,061,042)	$ (4,698,720)

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	34.00%
State tax rate, net of federal tax	3.20%	3.10%
Nondeductible expenses	5.40%	3.60%
Domestic production activities deduction	(0.00%)	(4.00%)
Tax Act rate change	0.00%	(26.00%)
Other	(3.30%)	0.10%
Total	26.30%	10.80%

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of beginning and ending unrecognized tax benefits
Balance as of January 1	$ 4,723	$ 4,723
Increase from current year tax positions	0	0
Decrease from settlements with taxing authority	0	0
Balance as of December 31	$ 4,723	$ 4,723

Commitments and Contingencies_2

Commitments and Contingencies Related to Discontinued Operations - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Contingency provision related to discontinued operations	$ 522,000	$ 497,000	$ 522,000
Provision for remediation costs	(275,000)		(440,000)
Loss from discontinued operations, net of tax	(172,137)	0	(275,624)
Discontinued operations	$ (103,000)	$ 0	$ (164,235)

Property, Buildings and Equip_3

Property, Buildings and Equipment - Summary of Property, Buildings and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 91,987,138	$ 74,999,954
Less accumulated depreciation	43,060,083	38,927,654
Net properties, buildings and equipment	48,927,055	36,072,300
Land
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	670,400	530,221
Land improvements
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 537,175	495,484
Land improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	7 years
Land improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	15 years
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 2,767,603	2,588,053
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	40 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 254,385	252,646
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	5 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	39 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 87,734,262	70,892,181
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	2 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	10 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 23,313	$ 241,369

401 (k) Employee Benefits Plan

401 (k) Employee Benefits Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Maximum annual contribution percentage per employee	75.00%
Employer discretionary contributions to the plan	$ 258	$ 297

Notes Payable - Summary of Note

Notes Payable - Summary of Notes Payable (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Balances of the Company's notes payable
Note payable balance	$ 28,920,000	$ 22,290,000
Less unamortized debt issuance costs	27,086	38,646
Total notes payable, net	28,892,914	22,251,354
Less current portion of notes payable, net	7,161,890	6,099,787
Notes payable net, less current portion	21,731,024	16,151,567
Current Working Capital Loan
Balances of the Company's notes payable
Note payable balance	$ 5,000,000	$ 0
Interest Rate	4.31%	0.00%
$27.49 Million Equipment Loan
Balances of the Company's notes payable
Loan agreement face amount	$ 27,490,000
Note payable balance	$ 23,920,000	$ 19,540,000
Interest Rate	4.31%	3.25%
$22.6 Million Equipment Loan
Balances of the Company's notes payable
Loan agreement face amount		$ 22,600,000
Previous Working Capital Loan
Balances of the Company's notes payable
Note payable balance	$ 0	$ 2,750,000
Interest Rate	0.00%	3.38%

Notes Payable - Narrative (Deta

Notes Payable - Narrative (Details) - USD ($)	Mar. 08, 2019	May 24, 2018	Dec. 31, 2018	Dec. 09, 2018	Dec. 31, 2018	Dec. 31, 2017	Apr. 07, 2020	Jan. 09, 2020	Mar. 09, 2019	Mar. 07, 2019	May 23, 2018	Jan. 01, 2018
Debt Instrument [Line Items]
Outstanding balance			$ 28,892,914		$ 28,892,914	$ 22,251,354
Repayments on notes payable					11,645,451	22,697,255
Borrowings outstanding			28,920,000		28,920,000	22,290,000
Letter of credit related to workers' compensation			575,000		575,000	420,000
Proceeds from notes payable					18,275,451	22,600,000
Previous Working Capital Loan
Debt Instrument [Line Items]
Repayments on notes payable		$ 2,780,000
Revolving line of credit loan			18,000,000		18,000,000
Borrowings outstanding			0		0	2,750,000
Current Working Capital Loan
Debt Instrument [Line Items]
Borrowings outstanding			5,000,000		5,000,000	$ 0
2027 Master Loan Agreement
Debt Instrument [Line Items]
Loan agreement face amount											$ 500,000
2018 Master Loan Agreement
Debt Instrument [Line Items]
Loan agreement face amount		2,000,000
$22.6 Million Equipment Loan
Debt Instrument [Line Items]
Loan agreement face amount		22,600,000										$ 22,600,000
$27.49 Million Equipment Loan
Debt Instrument [Line Items]
Loan agreement face amount		27,490,000	27,490,000		27,490,000
Periodic payment			598,000	$ 510,000
Borrowings outstanding		$ 16,990,000
Equipment Purchase Loan
Debt Instrument [Line Items]
Loan agreement face amount			405,000		405,000
Monthly repayment amount			$ 10,687		$ 10,687
Stated rate			5.85%		5.85%
LIBOR | 2015 Master Loan Agreement
Debt Instrument [Line Items]
Basis spread added to monthly LIBOR					1.80%
Subsequent Event | $27.49 Million Equipment Loan
Debt Instrument [Line Items]
Outstanding balance										$ 22,700,000
Subsequent Event | $38.2 Million Equipment Note
Debt Instrument [Line Items]
Loan agreement face amount										38,220,000
Monthly repayment amount								$ 1,000,000	$ 598,000
Proceeds from notes payable	$ 15,500,000
Subsequent Event | $4.5 Million Equipment Note
Debt Instrument [Line Items]
Loan agreement face amount										$ 4,500,000
Monthly repayment amount							$ 93,750

Notes Payable - Schedule of Rep

Notes Payable - Schedule of Repayments of Notes Payable (Details)	Dec. 31, 2018USD ($)
Equipment Purchase Loan
Debt Instrument [Line Items]
2019	$ 113,855
2020	120,697
2021	63,047
2022	0
Total payments of notes payable	297,599
Notes payable
Debt Instrument [Line Items]
2019	7,176,000
2020	12,176,000
2021	7,176,000
2022	2,392,000
Total payments of notes payable	$ 28,920,000

Commitments and Contingencies_3

Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2018USD ($)employer	Dec. 31, 2017USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2019	$ 3,613,980
2020	910,778
2021	88,469
2022	114,466
Total minimum operating lease payments	4,727,693
Total rent expense	4,700,000	$ 4,700,000
Contributions to plan	$ 227,000	$ 180,000
Arrangement Expiring August 31, 2019 | Multiemployer Plan, Plan Information, Available | National Electrical Benefit Fund | Multiemployer Plans, Pension
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Number of employers responsible for 5% or more of contributions to multiemployer pension plan | employer	0
Percent of employer contribution for multiemployer pension plan (no more than 5%)	5.00%
Office space
Operating Leased Assets [Line Items]
Non-cancelable operating lease period	9 years
Office equipment
Operating Leased Assets [Line Items]
Non-cancelable operating lease period	4 years
Electrical construction equipment
Operating Leased Assets [Line Items]
Non-cancelable operating lease period	60 months

Commitments and Contingencies -

Commitments and Contingencies - Performance Bonds (Details) $ in Millions	Dec. 31, 2018USD ($)
Performance Bond
Guarantor Obligations [Line Items]
Outstanding performance bonds	$ 46.4

Commitments and Contingencies_4

Commitments and Contingencies - Schedule of Multi-employer Pension Plans (Details) - Multiemployer Plan, Plan Information, Available - National Electrical Benefit Fund - Multiemployer Plans, Pension - Arrangement Expiring August 31, 2019	12 Months Ended
	Dec. 31, 2018
Multiemployer Plans [Line Items]
EIN Number	530181657
Plan Number	001

Commitments and Contingencies_5

Commitments and Contingencies - Committed Expenditures (Details)	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Committed expenditures	$ 3,813,623

Income Per Share of Common St_2

Income Per Share of Common Stock - Narrative (Details) - shares	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Shares of treasury stock excluded from weighted average number of common stock shares outstanding	3,223,529	2,362,418

Common Stock Repurchase Plan -

Common Stock Repurchase Plan - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Mar. 07, 2019	Sep. 13, 2018	Sep. 16, 2002
Equity, Class of Treasury Stock [Line Items]
Stock repurchased during the period	861,111
Purchase of treasury stock	$ 1,970,632	$ 0
Total number of shares repurchased	3,223,529	2,362,418
Total cost of shares repurchased	$ 3,278,819	$ 1,308,187
Average cost per share repurchased (usd per share)	$ 2.29
2002 Common Stock Repurchase Plan
Equity, Class of Treasury Stock [Line Items]
Stock repurchase plan, number of shares permitted				3,500,000
Remaining number of shares available to be repurchased				293,829
Total number of shares repurchased	3,206,171
Total cost of shares repurchased	$ 3,260,098
Average cost per share repurchased (usd per share)	$ 1.02
Stock Repurchase Programs Prior to 2002
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased					17,358
Total cost of shares repurchased					$ 18,720
Subsequent Event | 2002 Common Stock Repurchase Plan
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased			3,273,880
Subsequent Event | Revised Repurchase Plan
Equity, Class of Treasury Stock [Line Items]
Additional shares authorized for repurchase			2,500,000
Remaining number of shares available to be repurchased			2,726,120

Business Segment, Business Cr_3

Business Segment, Business Credit Risks and Concentration - Business Segments (Details)	12 Months Ended
	Dec. 31, 2018USD ($)Segment	Dec. 31, 2017USD ($)
Segment Reporting [Abstract]
Number of operating segments | Segment	2
Segment Reporting Information [Line Items]
Total revenue	$ 138,148,842	$ 113,953,519
Total operating expenses	130,585,138	103,768,229
Total operating income	7,563,704	10,185,290
Total other expenses, net	(739,007)	(575,918)
Income before income taxes	6,824,697	9,609,372
Identifiable Assets	112,548,475	93,631,940
Capital Expenditures	19,609,245	10,301,721
Depreciation and Amortization	8,436,972	7,217,901
Operating Segments | Electrical construction
Segment Reporting Information [Line Items]
Total revenue	136,526,511	109,154,476
Total operating expenses	123,914,953	95,463,721
Total operating income	12,611,558	13,690,755
Total other expenses, net	(761,117)	(562,233)
Income before income taxes	11,850,441	13,128,522
Identifiable Assets	93,642,412	78,745,673
Capital Expenditures	19,514,124	10,191,515
Depreciation and Amortization	8,319,362	7,086,361
Operating Segments | Real estate development
Segment Reporting Information [Line Items]
Total revenue	1,622,331	4,799,043
Total operating expenses	1,924,835	4,177,558
Total operating income	(302,504)	621,485
Total other expenses, net	(56,010)	(71,945)
Income before income taxes	(358,514)	549,540
Identifiable Assets	16,444,209	8,713,310
Capital Expenditures	42,545	1,065
Depreciation and Amortization	21,279	15,207
Corporate
Segment Reporting Information [Line Items]
Total operating expenses	4,745,350	4,126,950
Total operating income	(4,745,350)	(4,126,950)
Total other expenses, net	78,120	58,260
Income before income taxes	(4,667,230)	(4,068,690)
Identifiable Assets	2,461,854	6,172,957
Capital Expenditures	52,576	109,141
Depreciation and Amortization	$ 96,331	$ 116,333

Business Segment, Business Cr_4

Business Segment, Business Credit Risks and Concentration - Business Concentration and Credit Risks (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Accounts receivable and accrued billings, net	$ 22,236,071	$ 21,566,842
Revenue | Major customers | Customer A
Concentration Risk [Line Items]
Revenues	$ 39,866,000	$ 38,306,000
Concentration risk, percentage	29.00%	34.00%
Revenue | Major customers | Customer B
Concentration Risk [Line Items]
Revenues	$ 22,085,000	$ 16,912,000
Concentration risk, percentage	16.00%	15.00%
Revenue | Major customers | Customer C
Concentration Risk [Line Items]
Revenues	$ 16,972,000	$ 11,681,000
Concentration risk, percentage	12.00%	10.00%
Revenue | Service/product
Concentration Risk [Line Items]
Revenues	$ 138,149,000	$ 113,953,000
Concentration risk, percentage	100.07%	100.00%
Revenue | Service/product | Electrical construction
Concentration Risk [Line Items]
Revenues	$ 136,527,000	$ 109,154,000
Concentration risk, percentage	99.00%	96.00%
Revenue | Service/product | Principal electrical construction operations
Concentration Risk [Line Items]
Revenues	$ 129,022,000	$ 100,604,000
Concentration risk, percentage	93.00%	88.00%
Revenue | Service/product | Other electrical construction
Concentration Risk [Line Items]
Revenues	$ 7,505,000	$ 8,550,000
Concentration risk, percentage	6.00%	8.00%
Revenue | Service/product | Real estate development
Concentration Risk [Line Items]
Revenues	$ 1,622,000	$ 4,799,000
Concentration risk, percentage	1.00%	4.00%

Restricted Cash - Reconciliatio

Restricted Cash - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Cash and Investments [Abstract]
Cash and cash equivalents	$ 11,376,373	$ 18,529,757
Restricted cash	25,980	102,027
Cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows	$ 11,402,353	$ 18,631,784	$ 20,772,689

ASC 606 Revenue Recognition a_3

ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures - Disaggregation of Revenue (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total revenue	$ 138,148,842	$ 113,953,519
Electrical construction
Disaggregation of Revenue [Line Items]
Total revenue	136,526,511	109,154,476
Electrical construction | Southeast
Disaggregation of Revenue [Line Items]
Total revenue	54,123,848	56,268,413
Electrical construction | mid-Atlantic
Disaggregation of Revenue [Line Items]
Total revenue	41,071,994	29,289,385
Electrical construction | Texas-Southwest
Disaggregation of Revenue [Line Items]
Total revenue	33,825,666	15,046,719
Electrical construction | Other electrical construction
Disaggregation of Revenue [Line Items]
Total revenue	7,505,003	8,549,959
All Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,622,331	$ 4,799,043

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets Associated with the Acquisition of C&C (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 101,407	$ 101,407
Gross Carrying Amount	1,013,800	1,013,800
Accumulated Amortization	(324,634)	(263,134)
Net Carrying Amount	689,166	750,666
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization expense, 2019	60,000
Amortization expense, 2020	60,000
Amortization expense, 2021	60,000
Amortization expense, 2022	60,000
Amortization expense, 2023	$ 60,000
Trademarks/Names
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	15 years
Gross Carrying Amount	$ 640,000	640,000
Accumulated Amortization	(213,334)	(170,670)
Net Carrying Amount	$ 426,666	469,330
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years
Gross Carrying Amount	$ 350,000	350,000
Accumulated Amortization	(87,500)	(70,000)
Net Carrying Amount	$ 262,500	280,000
Non-competition agreement
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	5 years
Gross Carrying Amount	$ 10,000	10,000
Accumulated Amortization	(10,000)	(8,664)
Net Carrying Amount	$ 0	1,336
Other
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	1 year
Gross Carrying Amount	$ 13,800	13,800
Accumulated Amortization	(13,800)	(13,800)
Net Carrying Amount	$ 0	$ 0

ASC 606 Revenue Recognition a_4

ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 138,148,842	$ 113,953,519
Calculated under Revenue Guidance in Effect before Topic 606 | ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ (134,000)

ASC 606 Revenue Recognition a_5

ASC 606 Revenue Recognition and Significant Accounting Policies Disclosures - Performance Obligation Narrative (Details) $ in Millions	Dec. 31, 2018USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 36.4