Goldfield 10-K 15 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Mar. 13, 2017	Jun. 30, 2016
Document And Entity Information [Abstract] [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Entity Registrant Name	GOLDFIELD CORP
Entity Central Index Key	42,316
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		25,451,354
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 74,990
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 20,599,648	$ 11,374,238
Accounts receivable and accrued billings	19,094,407	17,250,067
Costs and estimated earnings in excess of billings on uncompleted contracts	7,313,099	10,292,199
Income taxes receivable	533,837	0
Current portion of notes receivable	0	47,851
Residential properties under construction	1,552,131	145,450
Prepaid expenses	1,037,715	1,210,780
Deferred income taxes	0	773,245
Other current assets	1,298,044	1,140,779
Total current assets	51,428,881	42,234,609
Property, buildings and equipment, at cost, net of accumulated depreciation of $33,140,214 in 2016 and $28,653,138 in 2015	33,245,947	34,671,947
Deferred charges and other assets
Land and land development costs	4,930,331	2,417,089
Cash surrender value of life insurance	550,672	549,600
Restricted cash	173,041	307,092
Notes receivable, less current portion	0	8,197
Goodwill	101,407	101,407
Intangibles, net of accumulated amortization of $201,634 in 2016 and $140,134 in 2015	812,166	873,666
Other assets	59,712	0
Total deferred charges and other assets	6,627,329	4,257,051
Total assets	91,302,157	81,163,607
Current liabilities
Accounts payable and accrued liabilities	11,386,119	10,067,553
Billings in excess of costs and estimated earnings on uncompleted contracts	845,057	234,161
Current portion of notes payable, net	6,101,855	5,815,510
Income taxes payable	0	483,763
Accrued remediation costs	102,526	135,786
Total current liabilities	18,435,557	16,736,773
Deferred income taxes	8,204,324	8,328,492
Accrued remediation costs, less current portion	112,380	107,429
Notes payable, less current portion, net	16,231,373	20,656,402
Other accrued liabilities	67,961	83,698
Total liabilities	43,051,595	45,912,794
Commitments and contingencies (notes 4, 7 and 8)	0	0
Stockholders’ equity
Preferred stock, $1 par value, 5,000,000 shares authorized, none issued
Common stock, $.10 par value, 40,000,000 shares authorized; 27,813,772 shares issued and 25,451,354 shares outstanding	2,781,377	2,781,377
Additional paid-in capital	18,481,683	18,481,683
Retained earnings	28,295,689	15,295,940
Treasury stock, 2,362,418 shares, at cost	(1,308,187)	(1,308,187)
Total stockholders’ equity	48,250,562	35,250,813
Total liabilities and stockholders’ equity	$ 91,302,157	$ 81,163,607

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Property, buildings and equipment, accumulated depreciation	$ 33,140,214	$ 28,653,138
Finite-lived intangible assets, accumulated amortization	$ 201,634	$ 140,134
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	25,451,354	25,451,354
Treasury stock, shares	2,362,418	2,362,418

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revenue
Electrical construction	$ 125,771,361	$ 119,616,561
Other	4,652,102	954,610
Total revenue	130,423,463	120,571,171
Costs and expenses
Electrical construction	93,566,045	99,726,789
Other	3,242,887	785,405
Selling, general and administrative	5,913,132	4,747,492
Depreciation and amortization	6,312,164	6,559,241
Gain on sale of property and equipment	(17,535)	(22,840)
Total costs and expenses	109,016,693	111,796,087
Total operating income	21,406,770	8,775,084
Other income (expense), net
Interest income	33,465	20,727
Interest expense, net of amount capitalized	(591,176)	(667,596)
Other income, net	68,465	75,880
Total other expense, net	(489,246)	(570,989)
Income from continuing operations before income taxes	20,917,524	8,204,095
Income tax provision	7,809,768	3,378,205
Income from continuing operations	13,107,756	4,825,890
Loss from discontinued operations, net of income tax benefit of $66,077 in 2016 and $200,759 in 2015	(108,007)	(332,748)
Net income	$ 12,999,749	$ 4,493,142
Net income (loss) per share of common stock — basic and diluted
Continuing operations (usd per share)	$ 0.52	$ 0.19
Discontinued operations (usd per share)	0	(0.01)
Net (loss) income (usd per share)	$ 0.51	$ 0.18
Weighted average shares outstanding - basic and diluted (shares)	25,451,354	25,451,354

Consolidated Statements of Inc5

Consolidated Statements of Income (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Loss from discontinued operations, net of income tax benefit of $66,077 in 2016 and $200,759 in 2015	$ 66,077	$ 200,759

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income	$ 12,999,749	$ 4,493,142
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	6,312,164	6,559,241
Amortization of debt issuance costs	23,418	51,028
Deferred income taxes	649,077	1,841,604
Gain on sale of property and equipment	(17,535)	(22,840)
Other gains	(1,072)	(3,309)
Changes in operating assets and liabilities
Accounts receivable and accrued billings	(1,844,340)	590,613
Costs and estimated earnings in excess of billings on uncompleted contracts	2,979,100	(3,754,919)
Residential properties under construction	(1,406,681)	(145,450)
Income taxes receivable	(533,837)	763,821
Prepaid expenses and other assets	(43,912)	(1,503,251)
Land and land development costs	(2,513,242)	147,360
Restricted cash	134,051	259,229
Income taxes payable	(483,763)	483,763
Accounts payable and accrued liabilities	1,286,576	414,244
Contract loss accruals	(65,089)	(2,482,494)
Billings in excess of costs and estimated earnings on uncompleted contracts	610,896	(1,303,810)
Accrued remediation costs	(28,309)	(820,165)
Net cash provided by operating activities	18,057,251	5,567,807
Cash flows from investing activities
Proceeds from disposal of property and equipment	263,876	1,796,786
Proceeds from notes receivable	56,048	47,380
Purchases of property, buildings and equipment	(4,989,663)	(5,997,166)
Net cash used in investing activities	(4,669,739)	(4,153,000)
Cash flows from financing activities
Proceeds from notes payable	4,700,000	24,500,000
Repayments on notes payable	(8,840,137)	(21,056,805)
Installment loan repayments	0	(3,259,635)
Debt issuance costs	(21,965)	(46,308)
Net cash (used in) provided by financing activities	(4,162,102)	137,252
Net increase in cash and cash equivalents	9,225,410	1,552,059
Cash and cash equivalents at beginning of year	11,374,238	9,822,179
Cash and cash equivalents at end of year	20,599,648	11,374,238
Supplemental disclosure of cash flow information
Interest paid, net of amounts capitalized	548,959	652,419
Income taxes paid, net	8,112,214	88,258
Supplemental disclosure of non-cash investing and financing activities
Liability for equipment acquired	$ 165,703	$ 84,361

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Treasury stock [Member]
Balance (shares) at Dec. 31, 2014		27,813,772
Balance at Dec. 31, 2014	$ 30,757,671	$ 2,781,377	$ 18,481,683	$ 10,802,798	$ (1,308,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 4,493,142	$ 0	0	4,493,142	0
Balance (shares) at Dec. 31, 2015	25,451,354	27,813,772
Balance at Dec. 31, 2015	$ 35,250,813	$ 2,781,377	18,481,683	15,295,940	(1,308,187)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 12,999,749	$ 0	0	12,999,749	0
Balance (shares) at Dec. 31, 2016	25,451,354	27,813,772
Balance at Dec. 31, 2016	$ 48,250,562	$ 2,781,377	$ 18,481,683	$ 28,295,689	$ (1,308,187)

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
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 and mid-Atlantic regions of the United States and Texas. 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 all means of collection have been exhausted and the potential for recovery is considered remote. As of December 31, 2016 and 2015 , 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 The Company accepts contracts on a fixed-price, unit-price and service agreement basis. Revenue from fixed-price construction contracts are recognized on the percentage-of-completion method, measured by the ratio of costs incurred to date, to the estimated total costs to be incurred for each contract. Revenue from unit-price contracts is recognized on either the percentage-of-completion method or a man-hour or man-hour plus equipment basis. 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, in accordance with ASC Topic 605-35-25-30 and ASC Topic 605-35-25-31, Revenue Recognition for Construction Type Contracts . 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 more than one year from the date of the consolidated financial statements. In accordance with ASC Topics 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, that is, 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 the Company’s land carrying value or residential properties under construction for either of the years ended December 31, 2016 or 2015 . 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 2016 or 2015 . Therefore, the Company has no compensation expense for shares pursuant to the 2013 Plan for either of the years ended December 31, 2016 or 2015 . 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 financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”). Actual results could differ from those estimates. Management considers the most significant estimates in preparing these financial statements to be the estimated cost to complete electrical construction contracts in progress, the adequacy of the accrued remediation costs and the realizability of deferred tax assets. 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 in 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’s long-term notes payable are also estimated by management to approximate carrying value since the interest rates prescribed by Branch Banking and Trust Company (the “Bank”) are variable market interest rates and are adjusted periodically. 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. 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 workers’ compensation insurance policies, as described in note 12. Goodwill and Intangible Assets Intangible assets with finite useful lives are recorded at cost upon acquisition, and 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 relations 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, 2016 , the Company assessed the recoverability of its long-lived assets and believed that there were no events or circumstances present that would require a test of recoverability on those assets. As a result, there was no impairment of the carrying amounts of such assets and no reduction in their estimated useful lives. Segment Reporting The Company operates as a single reportable segment, electrical construction, under ASC Topic 280-10-50 Disclosures about Segments of an Enterprise and Related Information . The Company’s real estate activities have diminished to a point that it is no longer significant for reporting purposes and, accordingly, results of the ongoing real estate operations are included in the income statement under the caption “Other.” Certain corporate costs are not allocated to the electrical construction segment. Reclassifications Certain amounts previously reflected on the prior year balance sheet and in the prior year statement of cash flows have been reclassified to conform to the Company’s 2016 presentation. The prior year balance sheet included amounts under contract loss accruals now included under accounts payable and accrued liabilities. In addition, the prior year balance sheet includes amounts under residential properties under construction previously included under other assets. The cash flows from operating activities include amounts under residential properties under construction previously included under other assets. These reclassifications had no effect on the previously reported total of current assets, current liabilities or cash flows from operating activities. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (the “FASB”) issued ASU 2014-09, 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”). The core principle of ASU 2014-09 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. ASU 2014-09 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. ASU 2014-09 allows for both retrospective and prospective methods of adoption and is effective for periods beginning after December 15, 2016. In August 2015, the FASB issued ASU 2015-14 which provides a one-year deferral of the revenue recognition standard’s effective date. Public business entities are required to apply the revenue recognition standard to annual reporting periods beginning after December 15, 2017, and interim periods within those annual periods. Early application is permitted but not before the original effective date for public business entities (annual reporting periods beginning after December 15, 2016). The option to use either a retrospective or cumulative-effective transition method did not change. The Company has performed preliminary assessments and continues to assess the impact on our accounting practices, policies and procedures for recognizing revenue under the new standard. Specifically, under the new standard, electrical construction fixed-price contracts currently accounted for under ASC 605-35 will be recognized over time as services are performed and the underlying obligation to the customer is fulfilled. Generally, this will result in the use of input measures on a cost to cost basis similar to the practices currently in place for contracts accounted for currently under ASC 605-35. The Company has assessed that under the new guidance the primary impact will be on the timing of when contract modifications and change orders are recognized, mainly due to the application of the contract identification criteria. Currently, contract modifications and change orders are generally included in total contract value when executed by the customer as compared to the new guidance, when legally enforceable. This may result in timing differences on the recognition in revenue and margin when compared to current practices. The Company has also assessed there will not be material changes in the pattern of revenue recognition for electrical construction contracts, which are currently accounted for on a time and materials basis. 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 our current accounting policies. Additionally, for real estate operations presented under the caption “Other” in the consolidated financial statements, the Company estimates that there will not be changes in the pattern of revenue recognition and will continue to recognize revenue upon the transfer of control of the promised real estate properties, generally at time of closing. The Company is currently completing its evaluation of significant contracts and assessing the potential changes and impact to its consolidated financial statements, as well as the method of adoption. The Company has identified and is in the process of implementing changes to its processes and internal controls to meet the reporting and disclosure requirements of this update and expects to adopt the new revenue recognition guidance, including all applicable subsequent ASUs issued, effective January 1, 2018. In May 2016, the FASB issued ASU 2016-12, which improves guidance on assessing collectability, presentation of sales taxes, non-cash consideration, and completed contracts and contract modifications at transition. The FASB has also issued the following standards which clarify ASU 2014-09 and have the same effective date as the original standard: ASU 2016-20, ASU 2016-10 and ASU 2016-08. These updates are effective concurrently with ASU 2014-09 and are also being evaluated by the Company. In August 2014, the FASB issued ASU 2014-15 requiring management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date the financial statements are issued. The standard also provides guidance on determining when and how to disclose going-concern uncertainties in the financial statements. The new guidance is effective for the annual period ending after December 15, 2016, and interim periods thereafter, with early adoption permitted. As required by the new standard, the Company’s management completed its evaluation and identified no probable conditions or events, individually or in the aggregate, that would raise a substantial doubt about the Company’s ability to continue as a going concern. The Company’s adoption of this guidance did not have a significant impact on its consolidated financial statements. In April 2015, the FASB issued ASU 2015-03 that intends to simplify the presentation of debt issuance costs. The new standard will more closely align the presentation of debt issuance costs under U.S. generally accepted accounting principles with the presentation under comparable IFRS standards. Debt issuance costs related to a recognized debt liability will be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. ASU 2015-03 is effective for public business entities for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted. The cost of issuing debt will no longer be recorded as a separate asset, except when incurred before receipt of the funding from the associated debt liability. Under current U.S. generally accepted accounting principles, debt issuance costs are reported on the balance sheet as assets and amortized as interest expense. The costs will continue to be amortized to interest expense using the effective interest method. Subsequent to the issuance of ASU 2015-03 the Securities and Exchange Commission staff made an announcement regarding the presentation of debt issuance costs associated with line-of-credit arrangements, which was codified by the FASB in ASU 2015-15. This guidance, which clarifies the exclusion of line-of-credit arrangements from the scope of ASU 2015-03, is effective upon adoption of ASU 2015-03. The Company has adopted both ASU 2015-03 and 2015-15. This new guidance was applied on a retrospective basis. In November 2015, the FASB issued ASU 2015-17 to simplify the presentation of deferred income taxes by requiring that deferred tax assets and liabilities be classified as non-current in the balance sheet. The new guidance is effective for the annual period ending after December 15, 2016, and interim periods thereafter, with early adoption permitted. The Company has adopted ASU 2015-17 prospectively as of January 1, 2016 and there were no adjustments made to prior periods as a result of the adoption. 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 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. Upon adoption, the lessee will apply the new standard retrospectively to all periods presented or retrospectively using a cumulative effect adjustment in the year of adoption. The Company expects this new guidance to cause a material increase to the assets and liabilities on the Company’s consolidated balance sheets. The Company is currently assessing the effect the adoption will have on its consolidated financial statements of income. 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 is currently assessing the effect that adoption of these standards will have on its consolidated financial statements. 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 Company is currently assessing the impact that adoption will have on its consolidated financial statements.

Costs and Estimated Earnings on

Costs and Estimated Earnings on Uncompleted Contracts	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Costs and Estimated Earnings on Uncompleted Contracts	Costs and Estimated Earnings on Uncompleted Contracts Long-term fixed-price electrical construction contracts in progress accounted for using the percentage-of-completion method as of December 31 for the years as indicated: 2016 2015 Costs incurred on uncompleted contracts $ 47,282,570 $ 46,719,492 Estimated earnings 18,644,216 18,910,883 65,926,786 65,630,375 Less billings to date 59,458,744 55,572,337 Total $ 6,468,042 $ 10,058,038 Included in the consolidated balance sheets under the following captions Costs and estimated earnings in excess of billings on uncompleted contracts $ 7,313,099 $ 10,292,199 Billings in excess of costs and estimated earnings on uncompleted contracts (845,057 ) (234,161 ) Total $ 6,468,042 $ 10,058,038 The amounts billed but not paid by customers pursuant to retention provisions of long-term electrical construction contracts were $3.2 million and $1.6 million as of December 31, 2016 and 2015 , 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.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The following table presents the income tax provision from continuing operations for the years ended December 31 as indicated: 2016 2015 Current Federal $ 6,157,900 $ 1,423,082 State 1,014,213 422,147 7,172,113 1,845,229 Deferred Federal 570,770 1,348,420 State 66,885 184,556 637,655 1,532,976 Total $ 7,809,768 $ 3,378,205 The following table presents the total income tax provision for the years ended December 31 as indicated: 2016 2015 Income tax provision $ 7,809,768 $ 3,378,205 Discontinued operations (66,077 ) (200,759 ) Total $ 7,743,691 $ 3,177,446 The following table presents the temporary differences and carryforwards, which give rise to deferred tax assets and liabilities as of December 31 as indicated: 2016 2015 Deferred tax assets Accrued vacation $ 146,215 $ 161,796 Acquisition costs capitalized 98,484 104,961 Accrued remediation costs 80,100 91,522 Accrued payables 122,235 226,795 Accrued workers’ compensation 127,033 182,258 Capitalized bidding costs 8,846 8,510 Inventory adjustments 133,991 159,324 Accrued lease expense 32,683 36,462 Accrued contract losses 89 24,581 Other 5,214 3,449 Total deferred tax assets 754,890 999,658 Deferred tax liabilities Deferred gain on installment notes — (11,034 ) Tax amortization in excess of financial statement amortization (12,156 ) (8,809 ) Tax depreciation in excess of financial statement depreciation (8,947,058 ) (8,535,062 ) Total deferred tax liabilities (8,959,214 ) (8,554,905 ) Total net deferred tax liabilities $ (8,204,324 ) $ (7,555,247 ) As of December 31, 2016 , the current deferred tax assets decreased to $0 from $773,000 as of December 31, 2015 primarily due to the early adoption of ASU 2015-17. The non-current deferred tax liabilities decreased to $8.2 million as of December 31, 2016 from $8.3 million as of December 31, 2015 mainly due to the early adoption of ASU 2015-17 offset by additional tax depreciation in excess of book depreciation. The Protecting Americans from Tax Hikes Act of 2015 allowed bonus depreciation for tax purposes for 2016 and extended bonus depreciation through 2019. 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 all 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, the duration of statutory carryforward periods, experience with loss carryforwards expiring unused, 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 strategies, 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, 2016 is approximately $2.0 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: 2016 2015 Federal statutory rate 35.0% 34.0% State tax rate, net of federal tax 3.3 4.9 Nondeductible expenses 1.6 4.0 Domestic production activities deduction (3.2) (1.3) Other 0.6 (0.4) Total 37.3% 41.2% The Company had gross unrecognized tax benefits of $5,000 as of both December 31, 2016 and 2015 . 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 2013 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: 2016 2015 Balance as of January 1 $ 4,723 $ 10,998 Increase from current year tax positions — 800 Decrease from settlements with taxing authority — (7,075 ) 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, 2016 and 2015 , the Company recognized $1,000 each year in interest and penalties. The Company had accrued as a current liability $8,000 and $7,000 for the future payment of interest and penalties as of December 31, 2016 and 2015 , respectively.

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	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. The Company has established a contingency provision related to discontinued operations, which was $215,000 and $243,000 , respectively, including an increase of $174,000 and $534,000 ( $108,000 and $333,000 , net of tax benefit of $66,000 and $201,000 , respectively) recognized for the years ended December 31, 2016 and 2015 , respectively. The increase for the year ended December 31, 2016 is related to costs associated with some corrective remediation efforts during the year. The increase for the year ended December 31, 2015 resulted mainly from changes in the scope of the project as required by the EPA. The remaining balance of the accrued remediation costs as of December 31, 2016 , mainly represents estimated future charges for EPA response costs and monitoring of the property. The total costs to be incurred in future periods may vary from this estimate. The provision will be reviewed periodically based upon facts and circumstances available at the time. The costs provisioned for future expenditures related to this environmental obligation are not discounted to present value.

Property, Buildings and Equipme

Property, Buildings and Equipment	12 Months Ended
	Dec. 31, 2016
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 2016 2015 Land — $ 371,228 $ 371,228 Land improvements 7 - 15 470,754 405,195 Buildings and improvements 5 - 40 2,155,578 2,104,320 Leasehold improvements 7 - 39 252,646 252,646 Machinery and equipment 2 - 10 62,955,883 60,185,730 Construction in progress — 180,072 5,966 Total 66,386,161 63,325,085 Less accumulated depreciation 33,140,214 28,653,138 Net properties, buildings and equipment $ 33,245,947 $ 34,671,947 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, 2016 and 2015 .

401 (k) Employee Benefits Plan

401 (k) Employee Benefits Plan	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [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 100% 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 $286,000 and $248,000 for the years ended December 31, 2016 and 2015 , respectively.

Notes Payable

Notes Payable	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Notes Payable	Notes Payable The following table presents the balances of our notes payables as of December 31 as indicated: Lending Institution Maturity Date 2016 2015 Interest Rates 2016 2015 Working Capital Loan Branch Banking and Trust Company November 28, 2019 $ 3,950,000 $ 1,500,000 2.44 % 2.06 % $10.0 Million Equipment Loan Branch Banking and Trust Company July 28, 2020 7,579,630 10,000,000 2.81 % 2.44 % $17.0 Million Equipment Loan Branch Banking and Trust Company March 6, 2020 9,601,000 13,027,392 2.50 % 2.13 % $2.0 Million Equipment Loan Branch Banking and Trust Company March 6, 2020 1,256,625 2,000,000 2.50 % 2.13 % Total notes payable 22,387,255 26,527,392 Less unamortized debt issuance costs 54,027 55,480 Total notes payable, net 22,333,228 26,471,912 Less current portion of notes payable, net 6,101,855 5,815,510 Notes payable net, less current portion $ 16,231,373 $ 20,656,402 As of December 31, 2016 , 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”) and C and C Power Line, Inc. (“C&C”), collectively (the “Debtors,”) were parties to a Master Loan Agreement, dated March 6, 2015 (the “2015 Master Loan Agreement”), with Branch Banking and Trust Company (the “Bank”). As of December 31, 2016 , the Company had a loan agreement 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 .” As of December 31, 2016 and December 31, 2015 , borrowings under the Working Capital Loan were $4.0 million and $1.5 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. As of December 31, 2016 and December 31, 2015 , the Company had $420,000 and $320,000 , respectively, for this irrevocable letter of credit related to workers’ compensation. As of December 31, 2016 , the Debtors had loan agreements with the Bank for the $10.0 Million Equipment Loan , the $17.0 Million Equipment Loan and the $2.0 Million Equipment Loan . All loans with the Bank are guaranteed by the Debtors and include the grant of a continuing security interest in all now owned and after acquired and wherever located personal property of the Debtors. The $10.0 Million Equipment Loan bears interest at a rate per annum equal to one month LIBOR (as defined in the ancillary loan documents) plus two percent 2.00% , which is adjusted monthly and subject to a maximum interest rate of 24.00% . The Working Capital Loan , the $17.0 Million Equipment Loan and the $2.0 Million Equipment 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 of 24.00% . 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, 2016 is as follows: 2017 $ 6,124,222 2018 6,124,222 2019 9,225,847 2020 912,964 Total payments of debt $ 22,387,255

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
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 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 rent 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, 2016 are as follows: 2017 $ 4,710,941 2018 4,623,641 2019 3,558,718 2020 828,355 Total minimum operating lease payments $ 13,721,655 Total expense for the operating leases were $4.8 million and $3.9 million for the years ended December 31, 2016 and 2015 , 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 bonds issued for the Company that have ever been called by a customer. As of December 31, 2016 , outstanding performance bonds issued on behalf of the Company’s electrical construction subsidiaries amounted to approximately $37.3 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, 2016 and 2015 , the contributions to these plans were $176,000 and $211,000 , 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 2016 and 2015 is for the plan’s year ended December 31, 2016 , and 2015 , 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 2016 2015 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, 2017 Committed Expenditures The Company from time to time commits to purchase capital equipment such as heavy trucks in order to accommodate manufacture lead times. As of December 31, 2016 the Company had approximately $541,000 of such commitments. 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, 2016
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, 2016 and 2015 , the Company had no common stock equivalents. The computation of the weighted average number of common stock shares outstanding excludes 2,362,418 shares of Treasury Stock for each of the years ended December 31, 2016 and 2015 .

Common Stock Repurchase Plan

Common Stock Repurchase Plan	12 Months Ended
	Dec. 31, 2016
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 15, 2016 , this plan permits the purchase of up to 3,500,000 shares. There is currently available for purchase through September 30, 2017 , a maximum of 1,154,940 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. No shares were repurchased during the years ended December 31, 2016 and December 31, 2015 . As of December 31, 2016 , the total number of shares repurchased under the Repurchase Plan was 2,345,060 at a cost of $1,289,467 (average cost of $0.55 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 .

Business Concentration and Cred

Business Concentration and Credit Risks	12 Months Ended
	Dec. 31, 2016
Risks and Uncertainties [Abstract]
Business Concentration and Credit Risks	Business Concentration and Credit Risks 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 $19.1 million and $17.3 million as of December 31, 2016 and 2015 , 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: 2016 2015 Amount % of Total revenue Amount % of Total revenue Electrical construction operations Customer A $ 23,669 18 $ 22,518 19 Customer B 18,630 14 16,093 13 Customer C 33,770 26 36,753 30 Revenue by service/product (in thousands of dollars) for the years ended December 31 as indicated are as follows: 2016 2015 Amount % of Total revenue Amount % of Total revenue Electrical construction operations Principal electrical construction operations (1) $ 118,748 91 $ 115,769 96 Other electrical construction (2) 7,023 5 3,847 3 Total 125,771 96 119,617 99 All other 4,652 4 955 1 Total revenue $ 130,423 100 $ 120,571 100 ___________ (1) Principal electrical construction operations includes 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 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, 2016
Restricted Cash and Investments [Abstract]
Restricted Cash	Restricted Cash Restricted cash, reported under “Deferred charges and other assets” on the Company’s balance sheet, represents amounts deposited in a trust account to secure the Company’s obligations in connection with the Company’s workers’ compensation insurance policies.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets Associated with the Acquisition of C&C	12 Months Ended
	Dec. 31, 2016
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, 2016 . 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, 2016 December 31, 2015 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Indefinite-lived and non-amortizable acquired intangible assets Goodwill Indefinite $ 101,407 $ — $ 101,407 $ 101,407 $ — $ 101,407 Definite-lived and amortizable acquired intangible assets Trademarks/Names 15 $ 640,000 $ (128,002 ) $ 511,998 $ 640,000 $ (85,334 ) $ 554,666 Customer relationships 20 350,000 (52,500 ) 297,500 350,000 (35,000 ) 315,000 Non-competition agreement 5 10,000 (7,332 ) 2,668 10,000 (6,000 ) 4,000 Other 1 13,800 (13,800 ) — 13,800 (13,800 ) — Total intangible assets, net $ 1,013,800 $ (201,634 ) $ 812,166 $ 1,013,800 $ (140,134 ) $ 873,666 Amortization of definite-lived intangible assets will be approximately $61,000 annually for 2017 through 2021 .

Organization and Summary of S21

Organization and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
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 and mid-Atlantic regions of the United States and Texas. 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	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 all means of collection have been exhausted and the potential for recovery is considered remote. As of December 31, 2016 and 2015 , 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 The Company accepts contracts on a fixed-price, unit-price and service agreement basis. Revenue from fixed-price construction contracts are recognized on the percentage-of-completion method, measured by the ratio of costs incurred to date, to the estimated total costs to be incurred for each contract. Revenue from unit-price contracts is recognized on either the percentage-of-completion method or a man-hour or man-hour plus equipment basis. 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, in accordance with ASC Topic 605-35-25-30 and ASC Topic 605-35-25-31, Revenue Recognition for Construction Type Contracts . 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 more than one year from the date of the consolidated financial statements. In accordance with ASC Topics 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, that is, 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.
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 2016 or 2015 .
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 financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”). Actual results could differ from those estimates. Management considers the most significant estimates in preparing these financial statements to be the estimated cost to complete electrical construction contracts in progress, the adequacy of the accrued remediation costs and the realizability of deferred tax assets.
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 in 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’s long-term notes payable are also estimated by management to approximate carrying value since the interest rates prescribed by Branch Banking and Trust Company (the “Bank”) are variable market interest rates and are adjusted periodically. 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.
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 workers’ compensation insurance policies, as described in note 12.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Intangible assets with finite useful lives are recorded at cost upon acquisition, and 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 relations 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, 2016 , the Company assessed the recoverability of its long-lived assets and believed that there were no events or circumstances present that would require a test of recoverability on those assets. As a result, there was no impairment of the carrying amounts of such assets and no reduction in their estimated useful lives.
Segment Reporting	Segment Reporting The Company operates as a single reportable segment, electrical construction, under ASC Topic 280-10-50 Disclosures about Segments of an Enterprise and Related Information . The Company’s real estate activities have diminished to a point that it is no longer significant for reporting purposes and, accordingly, results of the ongoing real estate operations are included in the income statement under the caption “Other.” Certain corporate costs are not allocated to the electrical construction segment.
Reclassifications	Reclassifications Certain amounts previously reflected on the prior year balance sheet and in the prior year statement of cash flows have been reclassified to conform to the Company’s 2016 presentation. The prior year balance sheet included amounts under contract loss accruals now included under accounts payable and accrued liabilities. In addition, the prior year balance sheet includes amounts under residential properties under construction previously included under other assets. The cash flows from operating activities include amounts under residential properties under construction previously included under other assets. These reclassifications had no effect on the previously reported total of current assets, current liabilities or cash flows from operating activities.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (the “FASB”) issued ASU 2014-09, 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”). The core principle of ASU 2014-09 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. ASU 2014-09 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. ASU 2014-09 allows for both retrospective and prospective methods of adoption and is effective for periods beginning after December 15, 2016. In August 2015, the FASB issued ASU 2015-14 which provides a one-year deferral of the revenue recognition standard’s effective date. Public business entities are required to apply the revenue recognition standard to annual reporting periods beginning after December 15, 2017, and interim periods within those annual periods. Early application is permitted but not before the original effective date for public business entities (annual reporting periods beginning after December 15, 2016). The option to use either a retrospective or cumulative-effective transition method did not change. The Company has performed preliminary assessments and continues to assess the impact on our accounting practices, policies and procedures for recognizing revenue under the new standard. Specifically, under the new standard, electrical construction fixed-price contracts currently accounted for under ASC 605-35 will be recognized over time as services are performed and the underlying obligation to the customer is fulfilled. Generally, this will result in the use of input measures on a cost to cost basis similar to the practices currently in place for contracts accounted for currently under ASC 605-35. The Company has assessed that under the new guidance the primary impact will be on the timing of when contract modifications and change orders are recognized, mainly due to the application of the contract identification criteria. Currently, contract modifications and change orders are generally included in total contract value when executed by the customer as compared to the new guidance, when legally enforceable. This may result in timing differences on the recognition in revenue and margin when compared to current practices. The Company has also assessed there will not be material changes in the pattern of revenue recognition for electrical construction contracts, which are currently accounted for on a time and materials basis. 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 our current accounting policies. Additionally, for real estate operations presented under the caption “Other” in the consolidated financial statements, the Company estimates that there will not be changes in the pattern of revenue recognition and will continue to recognize revenue upon the transfer of control of the promised real estate properties, generally at time of closing. The Company is currently completing its evaluation of significant contracts and assessing the potential changes and impact to its consolidated financial statements, as well as the method of adoption. The Company has identified and is in the process of implementing changes to its processes and internal controls to meet the reporting and disclosure requirements of this update and expects to adopt the new revenue recognition guidance, including all applicable subsequent ASUs issued, effective January 1, 2018. In May 2016, the FASB issued ASU 2016-12, which improves guidance on assessing collectability, presentation of sales taxes, non-cash consideration, and completed contracts and contract modifications at transition. The FASB has also issued the following standards which clarify ASU 2014-09 and have the same effective date as the original standard: ASU 2016-20, ASU 2016-10 and ASU 2016-08. These updates are effective concurrently with ASU 2014-09 and are also being evaluated by the Company. In August 2014, the FASB issued ASU 2014-15 requiring management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date the financial statements are issued. The standard also provides guidance on determining when and how to disclose going-concern uncertainties in the financial statements. The new guidance is effective for the annual period ending after December 15, 2016, and interim periods thereafter, with early adoption permitted. As required by the new standard, the Company’s management completed its evaluation and identified no probable conditions or events, individually or in the aggregate, that would raise a substantial doubt about the Company’s ability to continue as a going concern. The Company’s adoption of this guidance did not have a significant impact on its consolidated financial statements. In April 2015, the FASB issued ASU 2015-03 that intends to simplify the presentation of debt issuance costs. The new standard will more closely align the presentation of debt issuance costs under U.S. generally accepted accounting principles with the presentation under comparable IFRS standards. Debt issuance costs related to a recognized debt liability will be presented on the balance sheet as a direct deduction from the debt liability, similar to the presentation of debt discounts. ASU 2015-03 is effective for public business entities for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. Early adoption is permitted. The cost of issuing debt will no longer be recorded as a separate asset, except when incurred before receipt of the funding from the associated debt liability. Under current U.S. generally accepted accounting principles, debt issuance costs are reported on the balance sheet as assets and amortized as interest expense. The costs will continue to be amortized to interest expense using the effective interest method. Subsequent to the issuance of ASU 2015-03 the Securities and Exchange Commission staff made an announcement regarding the presentation of debt issuance costs associated with line-of-credit arrangements, which was codified by the FASB in ASU 2015-15. This guidance, which clarifies the exclusion of line-of-credit arrangements from the scope of ASU 2015-03, is effective upon adoption of ASU 2015-03. The Company has adopted both ASU 2015-03 and 2015-15. This new guidance was applied on a retrospective basis. In November 2015, the FASB issued ASU 2015-17 to simplify the presentation of deferred income taxes by requiring that deferred tax assets and liabilities be classified as non-current in the balance sheet. The new guidance is effective for the annual period ending after December 15, 2016, and interim periods thereafter, with early adoption permitted. The Company has adopted ASU 2015-17 prospectively as of January 1, 2016 and there were no adjustments made to prior periods as a result of the adoption. 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 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. Upon adoption, the lessee will apply the new standard retrospectively to all periods presented or retrospectively using a cumulative effect adjustment in the year of adoption. The Company expects this new guidance to cause a material increase to the assets and liabilities on the Company’s consolidated balance sheets. The Company is currently assessing the effect the adoption will have on its consolidated financial statements of income. 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 is currently assessing the effect that adoption of these standards will have on its consolidated financial statements. 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 Company is currently assessing the impact that adoption will have on its consolidated financial statements.

Costs and Estimated Earnings 22

Costs and Estimated Earnings on Uncompleted Contracts (Tables)	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Costs in Excess of Billings and Billings in Excess of Costs	Long-term fixed-price electrical construction contracts in progress accounted for using the percentage-of-completion method as of December 31 for the years as indicated: 2016 2015 Costs incurred on uncompleted contracts $ 47,282,570 $ 46,719,492 Estimated earnings 18,644,216 18,910,883 65,926,786 65,630,375 Less billings to date 59,458,744 55,572,337 Total $ 6,468,042 $ 10,058,038 Included in the consolidated balance sheets under the following captions Costs and estimated earnings in excess of billings on uncompleted contracts $ 7,313,099 $ 10,292,199 Billings in excess of costs and estimated earnings on uncompleted contracts (845,057 ) (234,161 ) Total $ 6,468,042 $ 10,058,038

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
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: 2016 2015 Current Federal $ 6,157,900 $ 1,423,082 State 1,014,213 422,147 7,172,113 1,845,229 Deferred Federal 570,770 1,348,420 State 66,885 184,556 637,655 1,532,976 Total $ 7,809,768 $ 3,378,205 The following table presents the total income tax provision for the years ended December 31 as indicated: 2016 2015 Income tax provision $ 7,809,768 $ 3,378,205 Discontinued operations (66,077 ) (200,759 ) Total $ 7,743,691 $ 3,177,446
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: 2016 2015 Deferred tax assets Accrued vacation $ 146,215 $ 161,796 Acquisition costs capitalized 98,484 104,961 Accrued remediation costs 80,100 91,522 Accrued payables 122,235 226,795 Accrued workers’ compensation 127,033 182,258 Capitalized bidding costs 8,846 8,510 Inventory adjustments 133,991 159,324 Accrued lease expense 32,683 36,462 Accrued contract losses 89 24,581 Other 5,214 3,449 Total deferred tax assets 754,890 999,658 Deferred tax liabilities Deferred gain on installment notes — (11,034 ) Tax amortization in excess of financial statement amortization (12,156 ) (8,809 ) Tax depreciation in excess of financial statement depreciation (8,947,058 ) (8,535,062 ) Total deferred tax liabilities (8,959,214 ) (8,554,905 ) Total net deferred tax liabilities $ (8,204,324 ) $ (7,555,247 )
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: 2016 2015 Federal statutory rate 35.0% 34.0% State tax rate, net of federal tax 3.3 4.9 Nondeductible expenses 1.6 4.0 Domestic production activities deduction (3.2) (1.3) Other 0.6 (0.4) Total 37.3% 41.2%
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: 2016 2015 Balance as of January 1 $ 4,723 $ 10,998 Increase from current year tax positions — 800 Decrease from settlements with taxing authority — (7,075 ) Balance as of December 31 $ 4,723 $ 4,723

Property, Buildings and Equip24

Property, Buildings and Equipment (Tables)	12 Months Ended
	Dec. 31, 2016
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 2016 2015 Land — $ 371,228 $ 371,228 Land improvements 7 - 15 470,754 405,195 Buildings and improvements 5 - 40 2,155,578 2,104,320 Leasehold improvements 7 - 39 252,646 252,646 Machinery and equipment 2 - 10 62,955,883 60,185,730 Construction in progress — 180,072 5,966 Total 66,386,161 63,325,085 Less accumulated depreciation 33,140,214 28,653,138 Net properties, buildings and equipment $ 33,245,947 $ 34,671,947

Notes Payable (Tables)

Notes Payable (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Schedule of long-term debt	The following table presents the balances of our notes payables as of December 31 as indicated: Lending Institution Maturity Date 2016 2015 Interest Rates 2016 2015 Working Capital Loan Branch Banking and Trust Company November 28, 2019 $ 3,950,000 $ 1,500,000 2.44 % 2.06 % $10.0 Million Equipment Loan Branch Banking and Trust Company July 28, 2020 7,579,630 10,000,000 2.81 % 2.44 % $17.0 Million Equipment Loan Branch Banking and Trust Company March 6, 2020 9,601,000 13,027,392 2.50 % 2.13 % $2.0 Million Equipment Loan Branch Banking and Trust Company March 6, 2020 1,256,625 2,000,000 2.50 % 2.13 % Total notes payable 22,387,255 26,527,392 Less unamortized debt issuance costs 54,027 55,480 Total notes payable, net 22,333,228 26,471,912 Less current portion of notes payable, net 6,101,855 5,815,510 Notes payable net, less current portion $ 16,231,373 $ 20,656,402
Schedule of payments of notes payable	The schedule of payments of the notes payable as of December 31, 2016 is as follows: 2017 $ 6,124,222 2018 6,124,222 2019 9,225,847 2020 912,964 Total payments of debt $ 22,387,255

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
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, 2016 are as follows: 2017 $ 4,710,941 2018 4,623,641 2019 3,558,718 2020 828,355 Total minimum operating lease payments $ 13,721,655
Schedule of multi-employer pension plans	Certified Zone Status Plan Name: EIN Number Plan Number 2016 2015 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, 2017

Business Concentration and Cr27

Business Concentration and Credit Risks (Tables)	12 Months Ended
	Dec. 31, 2016
Major customers [Member]
Concentration Risk [Line Items]
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: 2016 2015 Amount % of Total revenue Amount % of Total revenue Electrical construction operations Customer A $ 23,669 18 $ 22,518 19 Customer B 18,630 14 16,093 13 Customer C 33,770 26 36,753 30
Service/product [Member]
Concentration Risk [Line Items]
Schedule of concentration risk	Revenue by service/product (in thousands of dollars) for the years ended December 31 as indicated are as follows: 2016 2015 Amount % of Total revenue Amount % of Total revenue Electrical construction operations Principal electrical construction operations (1) $ 118,748 91 $ 115,769 96 Other electrical construction (2) 7,023 5 3,847 3 Total 125,771 96 119,617 99 All other 4,652 4 955 1 Total revenue $ 130,423 100 $ 120,571 100 ___________ (1) Principal electrical construction operations includes 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 Intangible28

Goodwill and Other Intangible Assets Associated with the Acquisition of C&C (Tables)	12 Months Ended
	Dec. 31, 2016
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, 2016 December 31, 2015 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Indefinite-lived and non-amortizable acquired intangible assets Goodwill Indefinite $ 101,407 $ — $ 101,407 $ 101,407 $ — $ 101,407 Definite-lived and amortizable acquired intangible assets Trademarks/Names 15 $ 640,000 $ (128,002 ) $ 511,998 $ 640,000 $ (85,334 ) $ 554,666 Customer relationships 20 350,000 (52,500 ) 297,500 350,000 (35,000 ) 315,000 Non-competition agreement 5 10,000 (7,332 ) 2,668 10,000 (6,000 ) 4,000 Other 1 13,800 (13,800 ) — 13,800 (13,800 ) — Total intangible assets, net $ 1,013,800 $ (201,634 ) $ 812,166 $ 1,013,800 $ (140,134 ) $ 873,666

Organization and Summary of S29

Organization and Summary of Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum service period term (in years)	1 year
Long-term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0	$ 0

Costs and Estimated Earnings 30

Costs and Estimated Earnings on Uncompleted Contracts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Contractors [Abstract]
Costs incurred on uncompleted contracts	$ 47,282,570	$ 46,719,492
Estimated earnings	18,644,216	18,910,883
Total estimated contract revenue	65,926,786	65,630,375
Less billings to date	59,458,744	55,572,337
Total	6,468,042	10,058,038
Costs and estimated earnings in excess of billings on uncompleted contracts	7,313,099	10,292,199
Billings in excess of costs and estimated earnings on uncompleted contracts	(845,057)	(234,161)
Contract receivable	$ 3,200,000	$ 1,600,000

Income Taxes (Details)

Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Current
Federal	$ 6,157,900	$ 1,423,082
State	1,014,213	422,147
Current Total	7,172,113	1,845,229
Deferred
Federal	570,770	1,348,420
State	66,885	184,556
Deferred Total	637,655	1,532,976
Total	7,809,768	3,378,205
Income tax provision	7,809,768	3,378,205
Discontinued operations	(66,077)	(200,759)
Total	7,743,691	3,177,446
Deferred tax assets
Accrued vacation	146,215	161,796
Acquisition costs capitalized	98,484	104,961
Accrued remediation costs	80,100	91,522
Accrued payables	122,235	226,795
Accrued workers’ compensation	127,033	182,258
Capitalized bidding costs	8,846	8,510
Inventory adjustments	133,991	159,324
Accrued lease expense	32,683	36,462
Accrued contract losses	89	24,581
Other	5,214	3,449
Total deferred tax assets	754,890	999,658
Deferred tax liabilities
Deferred gain on installment notes	0	(11,034)
Tax amortization in excess of financial statement amortization	(12,156)	(8,809)
Tax depreciation in excess of financial statement depreciation	(8,947,058)	(8,535,062)
Total deferred tax liabilities	(8,959,214)	(8,554,905)
Total net deferred tax liabilities	(8,204,324)	(7,555,247)
Current deferred tax asset	0	773,000
Non-current deferred tax liability	8,204,324	$ 8,328,492
Minimum amount of future taxable income required to realize deferred tax assets	$ 2,000,000
Schedule of differences between effective income tax rate and federal statutory rate
Federal statutory rate	35.00%	34.00%
State tax rate, net of federal tax	3.30%	4.90%
Nondeductible expenses	1.60%	4.00%
Domestic production activities deduction	(3.20%)	(1.30%)
Other	0.60%	(0.40%)
Total	37.30%	41.20%
Reconciliation of beginning and ending unrecognized tax benefits
Balance as of January 1	$ 4,723	$ 10,998
Increase from current year tax positions	0	800
Decrease from settlements with taxing authority	0	(7,075)
Balance as of December 31	4,723	4,723
Income tax interest and penalties expensed during period	1,000	1,000
Accrued income tax interest and penalties	$ 8,000	$ 7,000

Discontinued Operations (Detail

Discontinued Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Contingency provision related to discontinued operations	$ 215,000	$ 243,000
Provision for remediation costs	(174,000)	(534,000)
Loss from discontinued operations, net of tax	(108,007)	(332,748)
Income tax benefit, discontinued operations	$ (66,077)	$ (200,759)

Property, Buildings and Equip33

Property, Buildings and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 66,386,161	$ 63,325,085
Less accumulated depreciation	33,140,214	28,653,138
Net properties, buildings and equipment	33,245,947	34,671,947
Land [Member]
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	371,228	371,228
Land improvements [Member}
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 470,754	405,195
Land improvements [Member} | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	7 years
Land improvements [Member} | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	15 years
Buildings and improvements [Member}
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 2,155,578	2,104,320
Buildings and improvements [Member} | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	5 years
Buildings and improvements [Member} | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	40 years
Leasehold improvements [Member}
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 252,646	252,646
Leasehold improvements [Member} | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	7 years
Leasehold improvements [Member} | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	39 years
Machinery and equipment [Member}
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 62,955,883	60,185,730
Machinery and equipment [Member} | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	2 years
Machinery and equipment [Member} | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives in years	10 years
Construction in progress [Member}
Property, Plant and Equipment [Line Items]
Property, building and equipment, gross	$ 180,072	$ 5,966

401 (k) Employee Benefits Plan

401 (k) Employee Benefits Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Maximum annual contribution percentage per employee	100.00%
Employer discretionary contributions to the plan	$ 286	$ 248

Notes Payable (Details)

Notes Payable (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balances of the Company's notes payable
Note payable balance	$ 22,387,255	$ 26,527,392
Less unamortized debt issuance costs	54,027	55,480
Total notes payable, net	22,333,228	26,471,912
Less current portion of notes payable, net	6,101,855	5,815,510
Notes payable net, less current portion	$ 16,231,373	20,656,402
Working Capital Loan [Member]
Balances of the Company's notes payable
Maturity Date	Nov. 28, 2019
Note payable balance	$ 3,950,000	$ 1,500,000
Interest Rate	2.44%	2.06%
$10.0 Million Equipment Loan [Member]
Balances of the Company's notes payable
Loan agreement face amount	$ 10,000,000
Maturity Date	Jul. 28, 2020
Note payable balance	$ 7,579,630	$ 10,000,000
Interest Rate	2.81%	2.44%
$17.0 Million Equipment Loan [Member]
Balances of the Company's notes payable
Loan agreement face amount	$ 17,000,000
Maturity Date	Mar. 6, 2020
Note payable balance	$ 9,601,000	$ 13,027,392
Interest Rate	2.50%	2.13%
$2.0 Million Equipment Loan [Member]
Balances of the Company's notes payable
Loan agreement face amount	$ 2,000,000
Maturity Date	Mar. 6, 2020
Note payable balance	$ 1,256,625	$ 2,000,000
Interest Rate	2.50%	2.13%

Notes Payable - Textual (Detail

Notes Payable - Textual (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Notes Payable (Textual) [Abstract]
Borrowings outstanding	$ 22,387,255	$ 26,527,392
Letter of credit related to workers' compensation	420,000	320,000
Working Capital Loan [Member]
Notes Payable (Textual) [Abstract]
Revolving line of credit loan	18,000,000
Borrowings outstanding	3,950,000	1,500,000
$10.0 Million Equipment Loan [Member]
Notes Payable (Textual) [Abstract]
Borrowings outstanding	$ 7,579,630	$ 10,000,000
2015 Master Loan Agreement [Member]
Notes Payable (Textual) [Abstract]
Interest payable maximum rate	24.00%
London Interbank Offered Rate (LIBOR) [Member] | $10.0 Million Equipment Loan [Member]
Notes Payable (Textual) [Abstract]
Basis spread added to monthly LIBOR	2.00%
London Interbank Offered Rate (LIBOR) [Member] | 2015 Master Loan Agreement [Member]
Notes Payable (Textual) [Abstract]
Basis spread added to monthly LIBOR	1.80%
Maximum [Member] | $10.0 Million Equipment Loan [Member]
Notes Payable (Textual) [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	24.00%

Notes Payable - Schedule of Rep

Notes Payable - Schedule of Repayments of Notes Payable (Details)	Dec. 31, 2016USD ($)
Debt Disclosure [Abstract]
2,017	$ 6,124,222
2,018	6,124,222
2,019	9,225,847
2,020	912,964
Total payments of debt	$ 22,387,255

Commitments and Contingencies38

Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2016USD ($)employer	Dec. 31, 2015USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2,017	$ 4,710,941
2,018	4,623,641
2,019	3,558,718
2,020	828,355
Total minimum operating lease payments	13,721,655
Total rent expense	4,800,000	$ 3,900,000
Contributions to plan	176,000	$ 211,000
Purchase commitments	$ 541,000
Arrangement Expiring August 31, 2017 [Member] | Multiemployer Plan, Plan Information, Available [Member] | National Electrical Benefit Fund [Member] | Multiemployer Plans, Pension [Member]
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 [Member]
Operating Leased Assets [Line Items]
Non-cancelable operating lease period	9 years
Office equipment [Member]
Operating Leased Assets [Line Items]
Non-cancelable operating lease period	4 years
Electrical construction equipment [Member]
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, 2016USD ($)
Performance Bond [Mem ber]
Guarantor Obligations [Line Items]
Outstanding performance bonds	$ 37.3

Commitments and Contingencies40

Commitments and Contingencies - Schedule of Multi-employer Pension Plans (Details) - Multiemployer Plan, Plan Information, Available [Member] - National Electrical Benefit Fund [Member] - Multiemployer Plans, Pension [Member] - Arrangement Expiring August 31, 2017 [Member]	12 Months Ended
	Dec. 31, 2016
Multiemployer Plans [Line Items]
EIN Number	530,181,657
Plan Number	1

Income Per Share of Common St41

Income Per Share of Common Stock (Details) - shares	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Shares of treasury stock excluded from weighted average number of common stock shares outstanding	2,362,418	2,362,418

Common Stock Repurchase Plan (D

Common Stock Repurchase Plan (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Sep. 15, 2016	Dec. 31, 2015	Sep. 16, 2002
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased	2,362,418		2,362,418
Total cost of shares repurchased	$ 1,308,187		$ 1,308,187
2002 Common Stock Repurchase Plan [Member]
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		1,154,940
Total number of shares repurchased	2,345,060
Total cost of shares repurchased	$ 1,289,467
Average cost per share repurchased (usd per share)	$ 0.55
Stock Repurchase Programs Prior to 2002 [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares repurchased				17,358
Total cost of shares repurchased				$ 18,720

Business Concentration and Cr43

Business Concentration and Credit Risks (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Concentration Risk [Line Items]
Accounts receivable and accrued billings, net	$ 19,094,407	$ 17,250,067
Revenues	130,423,463	120,571,171
Revenue [Member] | Major customers [Member] | Customer A [Member]
Concentration Risk [Line Items]
Revenues	$ 23,669,000	$ 22,518,000
Concentration risk, percentage	18.00%	19.00%
Revenue [Member] | Major customers [Member] | Customer B [Member]
Concentration Risk [Line Items]
Revenues	$ 18,630,000	$ 16,093,000
Concentration risk, percentage	14.00%	13.00%
Revenue [Member] | Major customers [Member] | Customer C [Member]
Concentration Risk [Line Items]
Revenues	$ 33,770,000	$ 36,753,000
Concentration risk, percentage	26.00%	30.00%
Revenue [Member] | Service/product [Member]
Concentration Risk [Line Items]
Revenues	$ 130,423,000	$ 120,571,000
Concentration risk, percentage	100.00%	100.00%
Revenue [Member] | Service/product [Member] | Electrical Construction [Member]
Concentration Risk [Line Items]
Revenues	$ 125,771,000	$ 119,617,000
Concentration risk, percentage	96.00%	99.00%
Revenue [Member] | Service/product [Member] | Principal electrical construction operations [Member]
Concentration Risk [Line Items]
Revenues	$ 118,748,000	$ 115,769,000
Concentration risk, percentage	91.00%	96.00%
Revenue [Member] | Service/product [Member] | Other electrical construction [Member]
Concentration Risk [Line Items]
Revenues	$ 7,023,000	$ 3,847,000
Concentration risk, percentage	5.00%	3.00%
Revenue [Member] | Service/product [Member] | All other [Member]
Concentration Risk [Line Items]
Revenues	$ 4,652,000	$ 955,000
Concentration risk, percentage	4.00%	1.00%

Goodwill and Other Intangible44

Goodwill and Other Intangible Assets Associated with the Acquisition of C&C (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 101,407	$ 101,407
Gross Carrying Amount	1,013,800	1,013,800
Accumulated Amortization	(201,634)	(140,134)
Net Carrying Amount	812,166	873,666
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization expense, 2017	61,000
Amortization expense, 2018	61,000
Amortization expense, 2019	61,000
Amortization expense, 2020	61,000
Amortization expense, 2021	$ 61,000
Trademarks/Names [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	15 years
Gross Carrying Amount	$ 640,000	640,000
Accumulated Amortization	(128,002)	(85,334)
Net Carrying Amount	$ 511,998	554,666
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years
Gross Carrying Amount	$ 350,000	350,000
Accumulated Amortization	(52,500)	(35,000)
Net Carrying Amount	$ 297,500	315,000
Non-compete agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	5 years
Gross Carrying Amount	$ 10,000	10,000
Accumulated Amortization	(7,332)	(6,000)
Net Carrying Amount	$ 2,668	4,000
Other [Member]
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