Hill International (HIL) 10-Q 8 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document and Entity Information
Entity Registrant Name	Hill International, Inc.
Entity Central Index Key	0001287808
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		55,659,788
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Emerging Growth Company	false
Entity Small Business	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 25,746	$ 18,711
Cash - restricted	2,041	2,945
Accounts receivable, less allowance for doubtful accounts of $71,685 and $70,617	112,609	117,469
Current portion of retainage receivable	16,890	18,397
Accounts receivable - affiliates	19,479	19,261
Prepaid expenses and other current assets	5,288	5,554
Income tax receivable	957	758
Total current assets	183,010	183,095
Property and equipment, net	10,984	10,787
Cash - restricted, net of current portion	2,832	1,451
Operating lease right-of-use assets	16,771
Retainage receivable	7,142	5,895
Acquired intangibles, net	1,165	1,316
Goodwill	48,340	48,869
Investments	3,068	3,015
Deferred income tax assets	4,777	4,521
Other assets	5,138	5,820
Total assets	283,227	264,769
Liabilities and Stockholders’ Equity
Current maturities of notes payable and long-term debt	3,778	3,364
Accounts payable and accrued expenses	86,868	80,036
Income taxes payable	9,848	8,826
Current portion of deferred revenue	9,097	11,169
Current portion of operating lease liabilities	5,327
Other current liabilities	5,355	5,644
Total current liabilities	120,273	109,039
Notes payable and long-term debt, net of current maturities	45,081	44,587
Retainage payable	978	927
Deferred income taxes	326	418
Deferred revenue	3,752	5,105
Non-current operating lease liabilities	17,723
Other liabilities	4,330	10,248
Total liabilities	192,463	170,324
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.0001 par value; 1,000 shares authorized, none issued	0	0
Common stock, $0.0001 par value; 100,000 shares authorized, 62,205 shares and 62,181 shares issued at March 31, 2019 and December 31, 2018, respectively	6	6
Additional paid-in capital	210,325	210,084
Accumulated deficit	(87,579)	(85,444)
Accumulated other comprehensive loss	(4,381)	(2,575)
Less treasury stock of 6,546 shares at March 31, 2019 and December 31, 2018	(28,231)	(28,231)
Hill International, Inc. share of equity	90,140	93,840
Noncontrolling interests	624	605
Total equity	90,764	94,445
Total liabilities and stockholders’ equity	$ 283,227	$ 264,769

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 71,685	$ 70,617
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	62,205,000	62,181,000
Treasury stock, shares	6,546,000	6,546,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues	$ 98,683	$ 113,897
Direct expenses	67,247	77,635
Gross profit	31,436	36,262
Selling, general and administrative expenses	31,311	34,364
Plus: Share of profit of equity method affiliates	414	800
Less: Loss on performance bond	0	7,938
Operating profit (loss)	539	(5,240)
Interest and related financing fees, net	1,512	1,334
Loss before income taxes	(973)	(6,574)
Income tax expense	1,095	1,095
Loss from continuing operations	(2,068)	(7,669)
Discontinued operations:
Loss from discontinued operations, net of tax	0	(482)
Total loss from discontinued operations	0	(482)
Net loss	(2,068)	(8,151)
Less: net earnings (loss) - noncontrolling interests	67	(2)
Net loss attributable to Hill International, Inc.	$ (2,135)	$ (8,149)
Basic loss per common share from continuing operations (in dollars per share)	$ (0.04)	$ (0.14)
Basic loss per common share from discontinued operations (in dollars per share)	0	(0.01)
Basic loss per common share - Hill International, Inc. (in dollars per share)	$ (0.04)	$ (0.15)
Basic weighted average common shares outstanding (in shares)	55,946	52,992
Diluted loss per common share from continuing operations (in dollars per share)	$ (0.04)	$ (0.14)
Diluted loss per common share from discontinued operations (in dollars per share)	0	(0.01)
Diluted loss per common share - Hill International, Inc. (in dollars per share)	$ (0.04)	$ (0.15)
Diluted weighted average common shares outstanding (in shares)	55,946	52,992

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,068)	$ (8,151)
Foreign currency translation adjustment, net of tax	(1,854)	421
Comprehensive loss	(3,922)	(7,730)
Less: Comprehensive loss attributable to non-controlling interests	19	(2)
Comprehensive loss attributable to Hill International, Inc.	$ (3,941)	$ (7,728)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Hill Share of Stockholders' Equity	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive (Loss)	Treasury Stock	Non-controlling Interests
Balance at beginning of period (in shares) at Dec. 31, 2017			59,389
Balance at beginning of period at Dec. 31, 2017	$ 110,670	$ 109,075	$ 6	$ 197,104	$ (53,983)	$ (4,011)	$ (30,041)	$ 1,595
Balance at beginning of period of treasury stock (in shares) at Dec. 31, 2017							6,977
Increase (decrease) in stockholders' equity
Net loss	(8,151)	(8,149)			(8,149)			(2)
Other comprehensive earnings (loss)	(43)	421				421		(464)
Stock-based compensation expense	135	135		135
Cashless exercise of stock options (in shares)			568				13
Cashless exercise of stock options	2,350	2,350		2,295			$ 55
Acquisition of additional interest	(745)	(122)		(122)				(623)
Increase (decrease) related to ESA Put Options	745	745		745
Balance at end of period (in shares) at Mar. 31, 2018			59,957
Balance at end of period at Mar. 31, 2018	$ 104,961	104,455	$ 6	200,157	(62,132)	(3,590)	$ (29,986)	506
Balance at end of period of treasury stock (in shares) at Mar. 31, 2018							6,964
Balance at beginning of period (in shares) at Dec. 31, 2018	62,181		62,181
Balance at beginning of period at Dec. 31, 2018	$ 94,445	93,840	$ 6	210,084	(85,444)	(2,575)	$ (28,231)	605
Balance at beginning of period of treasury stock (in shares) at Dec. 31, 2018	6,546						6,546
Increase (decrease) in stockholders' equity
Net loss	$ (2,068)	(2,135)			(2,135)			67
Other comprehensive earnings (loss)	(1,854)	(1,806)				(1,806)		(48)
Stock issued to Board of Directors (in shares)			24
Stock issued to Board of Directors	0
Stock-based compensation expense	$ 241	241		241
Balance at end of period (in shares) at Mar. 31, 2019	62,205		62,205
Balance at end of period at Mar. 31, 2019	$ 90,764	$ 90,140	$ 6	$ 210,325	$ (87,579)	$ (4,381)	$ (28,231)	$ 624
Balance at end of period of treasury stock (in shares) at Mar. 31, 2019	6,546						6,546

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net loss	$ (2,068)	$ (8,151)
Loss from discontinued operations	0	482
Loss from continuing operations	(2,068)	(7,669)
Adjustments to reconcile net earnings (loss) to net cash provided by (used in):
Depreciation and amortization	791	1,291
Provision for bad debts	934	24
Amortization of deferred loan fees	179	6
Deferred tax benefit	(349)	(31)
Stock based compensation	241	451
Unrealized foreign exchange (losses) gains on intercompany balances	(511)	1,446
Changes in operating assets and liabilities:
Accounts receivable	5,390	7,469
Accounts receivable - affiliate	(218)	(2,035)
Operating lease right-of-use assets	1,408
Prepaid expenses and other current assets	551	890
Income taxes receivable	(199)	(162)
Retainage receivable	(1,247)	(725)
Other assets	690	(533)
Accounts payable and accrued expenses	6,851	(4,836)
Income taxes payable	1,020	99
Deferred revenue	(3,423)	(641)
Operating lease liabilities	(1,442)
Other current liabilities	31	(1,278)
Retainage payable	51	108
Other liabilities	(222)	582
Net cash provided by (used in) continuing operations	8,458	(5,544)
Net cash used in discontinued operations	0	(482)
Net cash provided by (used in) operating activities	8,458	(6,026)
Cash flows from investing activities:
Purchases of business	0	(122)
Purchase of property and equipment	(873)	(986)
Net cash used in investing activities	(873)	(1,108)
Cash flows from financing activities:
Payments on term loans	(266)	(89)
Net borrowings on revolving loans	1,192	2,069
Proceeds from stock issued under employee stock purchase plan	34	0
Proceeds from exercise of stock options	0	2,350
Net cash provided by financing activities	960	4,330
Effect of exchange rate changes on cash	(1,033)	(601)
Net increase (decrease) in cash, cash equivalents and restricted cash	7,512	(3,405)
Cash, cash equivalents and restricted cash — beginning of period	23,107	26,920
Cash, cash equivalents and restricted cash — end of period	30,619	23,515
Supplemental disclosures of cash flow information:
Interest and related financing fees paid	1,414	1,189
Income taxes paid	601	1,148
Cash paid for amounts included in the measurement of lease liabilities	1,814	0
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 18,178	$ 0

The Company

The Company	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company Hill International, Inc. (“Hill” or the “Company”) is a professional services firm that provides program management, project management, construction management and other consulting services primarily to the buildings, transportation, environmental, energy and industrial markets worldwide. Hill’s clients include the U.S. federal government, U.S. state and local governments, foreign governments and the private sector. All amounts included in the following Notes to the Consolidated Financial Statements are in thousands, except per share data.

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Summary The accompanying unaudited interim consolidated financial statements were prepared in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") pertaining to reports on Form 10-Q and should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles ("U.S. GAAP") for complete financial statements. In the opinion of management, these statements include all adjustments (consisting only of normal, recurring adjustments) necessary for a fair presentation of the consolidated financial statements. The consolidated financial statements include the accounts of Hill and its wholly- and majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The interim operating results are not necessarily indicative of the results for a full year. Construction Claims Group Sale On December 20, 2016, the Company and its subsidiary Hill International N.V. (“Hill N.V.” and, collectively with the Company, the “Sellers”) entered into a Stock Purchase Agreement (as amended on May 3, 2017, the “Agreement”) with Liberty Mergeco, Inc. (the “US Purchaser”) and Liberty Bidco UK Limited (the “UK Purchaser” and, collectively with the US Purchaser, the “Purchasers”) pursuant to which the Purchasers were to acquire the Construction Claims Group by the US Purchaser’s acquisition of all of the stock of Hill International Consulting, Inc. from the Company and the UK Purchaser’s acquisition of all of the stock of Hill International Consulting B.V. from Hill N.V. The Construction Claims Group sale closed on May 5, 2017. For a detailed description of the transaction, see "Note 5 Discontinued Operations" in the Company's 2018 Annual Report on Form 10-K for the year ended December 31, 2018 , filed with the SEC on April 1, 2019 . Reclassification A reclassification was made in the presentation of the consolidated statement of operations for the three months ended March 31, 2018. The Company moved $1,577 related to the middle east vacation expense accrual from direct expense and included it in selling, general and administrative expenses to conform to current year presentation. Summary of Significant Accounting Policies (a) Foreign Currency Translations and Transactions Assets and liabilities of all foreign operations are translated at period-end rates of exchange while revenues and expenses are translated at the average monthly exchange rates. Gains or losses resulting from translating foreign currency financial statements are accumulated in a separate component of stockholders’ equity entitled accumulated other comprehensive loss until the entity is sold or substantially liquidated. Gains or losses arising from foreign currency transactions (transactions denominated in a currency other than the entity’s local currency), including those resulting from intercompany transactions, are reflected in selling, general and administrative expenses in the consolidated statement of operations. The impact of foreign exchange on long-term intercompany loans, for which repayment has not been scheduled or planned, are recorded in accumulated other comprehensive loss on the consolidated balance sheet. (b) Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash investments and accounts receivable. The Company maintains its cash accounts with high quality financial institutions. Although the Company believes that the financial institutions with which it does business will be able to fulfill their commitments, there is no assurance that those institutions will be able to continue to do so. No single client accounted for 10% or more of revenue for the three months ended March 31, 2019 or 2018 . There was 1 client in the Middle East who contributed 10% or more to accounts receivable at March 31, 2019 and December 31, 2018, respectively which represents 18% and 17% of the accounts receivable balance at March 31, 2019 and December 31, 2018, respectively. (c) Allowance for Doubtful Accounts The allowance for doubtful accounts is an estimate prepared by management based on identification of the collectability of specific accounts and the overall condition of the receivable portfolios. When evaluating the adequacy of the allowance for doubtful accounts, the Company specifically analyzes trade receivables, including retainage receivable, historical bad debts, client credits, client concentrations, client credit worthiness, current economic trends and changes in client payment terms. If the financial condition of clients were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. Likewise, should the Company determine that it would be able to realize more of its receivables in the future than previously estimated, an adjustment to the allowance would increase earnings in the period such determination was made. The allowance for doubtful accounts is reviewed on a quarterly basis and adjustments are recorded as deemed necessary. (d) Retainage Receivable Retainage receivable represents balances billed but not paid by clients pursuant to retainage provisions in certain contracts and will be due upon completion of specific tasks or the completion of the contract. (e) Income Taxes The Company estimates income taxes in each of the jurisdictions in which it operates. This process involves estimating its actual current tax exposure together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within the Company’s consolidated balance sheets. The Company assesses the likelihood that the deferred tax assets will be recovered from future taxable income and to the extent it believes recovery is not likely, the Company establishes a valuation allowance. To the extent the Company establishes a valuation allowance in a period, it must include an expense within the tax provision in the consolidated statements of operations. The Company has recorded a valuation allowance to reduce the deferred tax asset to an amount that is more likely than not to be realized in future years. If the Company determines in the future that it is “more likely than not” (i.e., a likelihood greater than 50 percent) to be allowed by the tax jurisdiction based solely on the technical merits of the position, that the deferred tax assets subject to the valuation allowance will be realized, then the previously provided valuation allowance will be adjusted. The Company recognizes a tax benefit in the financial statements for an uncertain tax position only if management’s assessment is that the position is more likely than not that the benefit will be ultimately realized. The term “tax position” refers to a position in a previously filed tax return or a position expected to be taken in a future tax return that is reflected in measuring current or deferred income tax assets and liabilities for interim or annual periods. (f) Revenue Recognition The Company generates revenue primarily from providing professional services to its clients under various types of contracts. In providing these services, the Company may incur reimbursable expenses, which consist principally of amounts paid to subcontractors and other third parties and travel and other job related expenses that are contractually reimbursable from clients. The Company includes reimbursable expenses in computing and reporting its total revenue as long as the Company remains responsible to the client for the fulfillment of the contract and for the overall acceptability of all services provided. If estimated total costs on any contract project a loss, the Company charges the entire estimated loss to operations in the period the loss becomes known. The cumulative effect of revisions to revenue, estimated costs to complete contracts, including penalties, incentive awards, change orders, claims, anticipated losses, and others are recorded in the accounting period in which the events indicating a loss are known and the loss can be reasonably estimated. These loss projects are re-assessed for each subsequent reporting period until the project is complete. Such revisions could occur at any time and the effects may be material. See footnote 4, "Revenue from Contracts with Customers," for more detail, regarding how the Company recognizes revenue under each type of its contractual arrangements. (g) Restricted Cash Restricted cash primarily represents cash collateral required to be maintained in foreign bank accounts to serve as collateral for letters of credit, bonds or guarantees on certain projects. The cash will remain restricted until the respective project has been completed, which typically is greater than one year. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets that sum to the total of the same such amounts shown in the statements of cash flows: March 31, 2019 March 31, 2018 Cash and cash equivalents $ 25,746 $ 18,711 Cash - restricted 2,041 2,945 Cash - restricted, net of current portion 2,832 1,451 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows 30,619 23,107 (h) Earnings (loss) per Share Basic earnings (loss) per common share have been computed using the weighted-average number of shares of common stock outstanding during the period. Diluted earnings (loss) per common share incorporates the incremental shares issuable upon the assumed exercise of stock options, the assumed vesting of stock and deferred and restricted stock unit awards using the treasury stock method, if dilutive. The Company has outstanding options to purchase approximately 1,417 shares and 5,339 shares at March 31, 2019 and 2018 , respectively. In addition, the Company had 471 restricted stock units outstanding at March 31, 2019 . These awards were excluded from the calculation of diluted earnings (loss) per share for the three months ended March 31, 2019 because they were antidilutive due to the Company's net loss from continuing operations. The following table provides a reconciliation to net earnings (loss) used in the numerator for earnings (loss) per share from continuing operations attributable to Hill: Three Months Ended March 31, 2019 2018 Loss from continuing operations $ (2,068 ) $ (7,669 ) Less: net earnings - noncontrolling interest 67 (2 ) Net loss from continuing operations attributable to Hill $ (2,135 ) $ (7,667 ) (i) New Accounting Pronouncements Changes to U.S. GAAP are typically established by the Financial Accounting Standards Board (“FASB”) in the form of accounting standards updates (“ASUs”) to the FASB’s Accounting Standards Codification (“ASC”). The Company considers the applicability and impact of all ASUs and, based on its assessment, determined that any recently issued or proposed ASUs not listed below are either not applicable to the Company or adoption will have minimal impact on its consolidated financial statements. For additional information with respect to new accounting pronouncements and the impact of these pronouncements on our consolidated financial statements, see Note 3 to the consolidated financial statements in Item 8 of Form 10K for the year ended December 31, 2018 filed with the SEC on April 1, 2019 . See update below. Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-2, Leases (Topic 842), which required the Company to recognize lease assets and lease liabilities (related to leases previously classified as operating under previous U.S. GAAP) on its consolidated balance sheet for all leases in excess of one year in duration. The ASU was effective for the Company on January 1, 2019. The adoption of this ASU impacted the Company’s financial statements in that all existing leases were recorded as right-of-use ("ROU") assets and liabilities on the balance sheet. The Company elected to adopt the ASU 2016-2 using the modified retrospective method and, therefore, have not recast comparative periods presented in its unaudited consolidated financial statements. The Company elected the package of transition practical expedients for existing leases and therefore the Company has not reassessed the following: lease classification for existing leases, whether any existing contracts contained leases, if any initial direct costs were incurred and whether existing land easements should be accounted for as leases. The Company did not apply the hindsight practical expedient, accordingly, the Company did not use hindsight in its assessment of lease terms,. As permitted under ASU 2016-2, the Company elected as accounting policy elections to not recognize ROU assets and related lease liabilities for leases with terms of twelve months or less and to not separate lease and non-lease components, and instead account for the non-lease components together with the lease components as a single lease component. In connection with the adoption of the new standard, the Company recorded $16,876 of operating lease right of use assets and $23,309 of operating lease liabilities as of January 1, 2019. See Note 14 of this Form 10-Q for additional information and required disclosures. Under Topic 842, the Company determined if an arrangement is a lease at inception. ROU assets and liabilities are recognized at commencement date based on the present value of remaining lease payments over the lease term. For this purpose, the Company considers only payments that are fixed and determinable at the time of commencement. As most of the Company's leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The Company's determined incremental borrowing rate is a hypothetical rate based on its understanding of what the Company's credit rating would be. The ROU asset also includes any lease payments made prior to commencement and is recorded net of any lease incentives received and net of the deferred rent balance on the date of implementation. The Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that it will exercise such options. In June 2018, the FASB issued ASU No. 2018-07 , Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting to simplify the accounting for share-based transactions by expanding the scope of Topic 718 from only being applicable to share-based payments to employees to also include share-based payment transactions for acquiring goods and services from nonemployees. As a result, nonemployee share-based transactions will be measured by estimating the fair value of the equity instruments at the grant date, taking into consideration the probability of satisfying performance conditions. This ASU was effective for annual and interim reporting periods beginning after December 15, 2018. Our equity incentive plans limit share-based awards to employees and directors of the Company, therefore, adoption of this standard did not have a material impact on the Company’s consolidated financial statements. On January 1, 2019, the Company adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification , which amended certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders’ equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders’ equity presented in the balance sheet must be provided in a note or separate statement. We have updated our Consolidated Financial Statements to include a reconciliation of the beginning balance to the ending balance of stockholders’ equity for each period for which a statement of comprehensive income is presented. Recently Issued Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments (Topic 326) - Credit Losses: Measurement of Credit Losses on Financial Instruments , which provides guidance regarding the measurement of credit losses on financial instruments. The new guidance replaces the incurred loss impairment methodology in the current guidance with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to determine credit loss estimates. This ASU will be effective for the Company commencing January 1, 2020 with early adoption permitted commencing January 1, 2019. The Company is in the process of assessing the impact of this ASU on our consolidated financial statements and disclosures. In January 2017, the FASB issued ASU 2017-4, Intangibles - Goodwill and Other (Topic 350), which removes step 2 from the goodwill impairment test. As a result, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting units’ fair value. The guidance is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for annual or interim goodwill impairment tests performed on testing dates after January 1, 2017, and the prospective transition method should be applied. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption of the amendments in this update is permitted, including adoption in any interim period, for all entities. The amendments in this update should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is in the process of assessing the impact of this ASU on its consolidated financial statements and does not expect this update to have a material impact on the Company's consolidated financial statements. In October 2018, the FASB issued ASU 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities ("VIE"). The amendments in this ASU for determining whether a decision-making fee is a variable interest require reporting entities to consider indirect interests held through related parties under common control on a proportional basis rather than as the equivalent of a direct interest in its entirety (as currently required by GAAP). These amendments will create alignment between determining whether a decision-making fee is a variable interest and determining whether a reporting entity within a related party group is the primary beneficiary of a VIE. The standard is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2019 for public companies. Early adoption is permitted. The Company is currently determining the impact that adoption of this guidance will have on the financial statements. In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606. This ASU provides guidance on whether certain transactions between collaborative arrangement participants should be accounted for with revenue under Topic 606, specifically when the collaborative arrangement participant is a customer in the context of a unit-of-account. It provides more comparability in the presentation of revenues for certain transactions between collaborative arrangement participants, including adding unit-of-account guidance in Topic 808 to align with the guidance in Topic 606 (that is, a distinct good or service) when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within the scope of Topic 606. The standard is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2019 for public companies. Early adoption is permitted. The Company is currently determining the impact that adoption of this guidance will have on the financial statements.

Liquidity

Liquidity	3 Months Ended
	Mar. 31, 2019
Liquidity [Abstract]
Liquidity	Liquidity At March 31, 2019 our principal sources of liquidity consisted of $25,746 of cash and cash equivalents, $105 of available borrowing capacity under the Domestic Revolving Credit Facility, $165 of available borrowing capacity under the International Revolving Credit Facility and $687 under other foreign credit agreements. Additional information regarding the Company's credit facilities is set forth in Note 9 - Notes Payable and Long-Term Debt. The Company believes that it has sufficient liquidity to support the reasonably anticipated cash needs of its operations over the next twelve months from the date of this filing. The Company produced cash from operations of $8,458 in the first quarter of 2019. The Company's net cash used in operations during 2018 was primarily due to a number of costs related to the financial statement restatement, restructuring and a performance bond that was called. We do not expect these costs to reoccur.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers The Company recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for such goods or services. Below is a description of the basic types of contracts from which the Company may earn revenue: Time and Materials Contracts Under the time and materials (“T&M”) arrangements, contract fees are based upon time and materials incurred. The contracts may be structured as basic time and materials, cost plus a margin or time and materials subject to a maximum contract value (the "cap value"). Due to the potential limitation of the cap value, the economic factors of the contracts subject to a cap value differ from the economic factors of basic T&M and cost plus contracts. The majority of the Company’s contracts are for consulting projects where it bills the client monthly at hourly billing rates. The hourly billing rates are determined by contract terms. Under cost plus contracts, the Company charges its clients for its costs, including both direct and indirect costs, plus a fixed fee or rate. Under time and materials contracts with a cap value, the Company charges the clients for time and materials based upon the work performed however there is a cap or a not to exceed value. There are often instances that a contract is modified to extend the contract value past the cap. As the consideration is variable depending on the outcome of the contract renegotiation, the Company will estimate the total contract price in accordance with the variable consideration guidelines and will only include consideration that it expects to receive from the customer. When the Company is reaching the cap value, the contract will be renegotiated, or Hill ceases work when the maximum contract value is reached. The Company will continue to work if it is probable that the contract will be extended. The Company will only include consideration or contract renegotiations to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved. If the Company continues to work and is uncertain that a contract change order will be processed, the variable consideration will be constrained to the cap until it is probable that the contract will be renegotiated. The Company is only entitled to consideration for the work it has performed, and the cap value is not a guaranteed contract value. Fixed Price Contracts Under fixed price contracts, the Company’s clients pay an agreed amount negotiated in advance for a specified scope of work. The Company is guaranteed to receive the consideration to the extent that the Company delivers under the contract. The Company recognizes revenue over a period of time on fixed price contracts using the input method based upon direct costs incurred to date, which are compared to total projected direct costs. Costs are the most relevant measure to determine the transfer of the service to the customer. The Company assess contracts quarterly and may recognize any expected future loss before actually incurring the loss. When the Company is expecting to reach the total value of the contract, the Company will begin to negotiate a change order. Change Orders and Claims Change orders are modifications of an original contract that effectively change the provisions of the contract without adding new provisions. Either the Company or its client may initiate change orders. They may include changes in specifications or design, manner of performance, facilities, equipment, materials, sites and period of completion of the work. Management evaluates when a change order is probable based upon its experience in negotiating change orders, the customer’s written approval of such changes or separate documentation of change order costs that are identifiable. Change orders may take time to be formally documented and terms of such change orders are agreed with the client before the work is performed. Sometimes circumstances require that work progresses before an agreement is reached with the client. If the Company is having difficulties in renegotiating the change order, the Company will stop work, record all costs incurred to date, and determine, on a project by project basis, the appropriate final revenue recognition. Claims are amounts in excess of the agreed contract price that the Company seeks to collect from its clients or others for client-caused delays, errors in specifications and designs, contract terminations, change orders that are either in dispute or are unapproved as to both scope and price, or other causes of unanticipated additional contract costs. Costs related to change orders and claims are recognized when they are incurred. The Company evaluates claims on an individual basis and recognizes revenue it believes is probable to collect. U.S. Federal Acquisition Regulations The Company has contracts with the U.S. government that contain provisions requiring compliance with the U.S. Federal Acquisition Regulations (“FAR”). These regulations are generally applicable to all of its federal government contracts and are partially or fully incorporated in many local and state agency contracts. They limit the recovery of certain specified indirect costs on contracts subject to the FAR. Cost-plus contracts covered by the FAR provide for upward or downward adjustments if actual recoverable costs differ from the estimate billed under forward pricing arrangements. Most of the Company's federal government contracts are subject to termination at the convenience of the federal government. Contracts typically provide for reimbursement of costs incurred and payment of fees earned through the date of such termination. Federal government contracts that are subject to the FAR and that are required by state and local governmental agencies to be audited are performed, for the most part, by the Defense Contract Audit Agency (“DCAA”). The DCAA audits the Company’s overhead rates, cost proposals, incurred government contract costs and internal control systems. During the course of its audits, the DCAA may question incurred costs if it believes the Company has accounted for such costs in a manner inconsistent with the requirements of the FAR or Cost Accounting Standards and recommend that its U.S. government corporate administrative contracting officer disallow such costs. Historically, the Company has not incurred significant disallowed costs because of such audits. However, the Company can provide no assurance that the DCAA audits will not result in material disallowances of incurred costs in the future. The Company provides for a refund liability to the extent that it expects to refund some of the consideration received from a customer. Disaggregation of Revenues The Company has one operating segment, the Project Management Group, which reflects how the Company is being managed. Additional information related to the Company’s operating segment is provided in Note 12 - Segment and Related Information. The Project Management Group provides extensive construction and project management services to construction owners worldwide. The Company considered the type of customer, type of contract and geography for disaggregation of revenue. The Company determined that disaggregating by (1) contract type; and (2) geography would provide the most meaningful information to understand the nature, amount, timing, and uncertainty of its revenues. The type of customer does not influence the Company’s revenue generation. Ultimately, the Company is supplying the same services of program management, project management, construction management, project management oversight, troubled project turnaround, staff augmentation, project labor agreement consulting, commissioning, estimating and cost management, labor compliance services and facilities management services. The Company’s contracts are generally long term contracts that are either based upon time and materials incurred or provide for a fixed price. The contract type will determine the level of risk in the contract related to revenue recognition. For purposes of disaggregation of revenue, the contract types have been grouped into: (1) Fixed Price - which include fixed price projects; and, (2) T&M - which include T&M contracts, T&M with a cap and cost plus contracts. The geography of the contracts will depict the level of global economic factors in relation to revenue recognition. The components of the Company’s revenue by contract type and geographic region for the three months ended March 31, 2019 and 2018 are as follows: Three Months Ended March 31, 2019 Fixed Price T&M Total Percent of revenue United States $ 3,433 $ 44,659 $ 48,092 48.7 % Latin America 2,016 418 2,434 2.5 % Europe 6,051 5,293 11,344 11.5 % Middle East 11,365 16,946 28,311 28.7 % Africa 571 6,378 6,949 7.0 % Asia/Pacific 300 1,253 1,553 1.6 % Total $ 23,736 $ 74,947 $ 98,683 100.0 % Three Months Ended March 31, 2018 Fixed Price T&M Total Percent of revenue United States $ 3,056 $ 48,516 $ 51,572 45.2 % Latin America 1,821 991 2,812 2.5 % Europe 4,803 5,654 10,457 9.2 % Middle East 17,804 22,494 40,298 35.4 % Africa 38 6,665 6,703 5.9 % Asia/Pacific 581 1,474 2,055 1.8 % Total $ 28,103 $ 85,794 $ 113,897 100.0 % The Company recognizes revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services. The Company exercises judgment in determining if the contractual criteria are met to determine if a contract with a customer exists, specifically in the earlier stages of a project when a formally executed contract may not yet exist. The Company typically has one performance obligation under a contract to provide fully-integrated project management services, and, occasionally, a separate performance obligation to provide facilities management services. Performance obligations are delivered over time as the customer receives the service. The consideration promised within a contract may include fixed amounts, variable amounts, or both. Variable consideration is included in the transaction price only to the extent it is probable, in the Company’s judgment, that a significant future reversal in the amount of cumulative revenue recognized under the contract will not occur. In estimating the transaction price for pending change orders, the Company considers all relevant facts, including documented correspondence with the customer regarding acknowledgment and/or agreement with the modification, as well as historical experience with the customer or similar contractual circumstances. The Company transfers control of its service over time and, therefore, satisfies a performance obligation and recognizes revenue over time by measuring the progress toward complete satisfaction of that performance obligation. The Company’s fixed price projects and T&M contracts subject to a cap value generally use a cost-based input method to measure its progress towards complete satisfaction of the performance obligation as the Company believes this best depicts the transfer of control to the customer. Under the cost-based measure of progress, the extent of progress towards completion is measured based on the ratio of costs incurred to date to the total estimated costs at completion of the performance obligation. Due to the nature of the work required to be performed under the Company’s performance obligations, estimating total revenue and cost at completion on its long term contracts is complex, subject to many variables and requires significant judgment. For basic and cost plus T&M contracts, the Company recognizes revenue over time using the output method which measures progress toward complete satisfaction of the performance obligation based upon actual costs incurred, using the right to invoice practical expedient. Accounts Receivable Accounts receivable includes amounts billed and currently due from customers and amounts for work performed which have not been billed to date. The billed and unbilled amounts are stated at the net estimated realizable value. The Company maintains an allowance for doubtful accounts to provide for the estimated amount of receivables that will not be collected. The allowance is based upon an assessment of customer creditworthiness, historical payment experience and the age of outstanding receivables. Contract Assets and Liabilities Contract assets include unbilled amounts typically resulting from performance under long-term contracts where the revenue recognized exceeds the amount billed to the customer. Retainage receivable is included in contract assets. The current portion of retainage receivable is a contract asset, which prior to the adoption of ASC 606, had been classified within accounts receivable. The Company’s contract liabilities consist of advance payments and billings in excess of revenue recognized and are reported as deferred revenue in the consolidated balance sheet. The Company classifies billings in excess of revenue recognized as deferred revenue as current or noncurrent based on the timing of when revenue is expected to be recognized. The difference between the opening and closing balances of the Company’s contract assets and contract liabilities primarily results from the timing of the Company’s performance and customer payments. The amount of revenue recognized during the three months ended March 31, 2019 and 2018 that was included in the deferred revenue balance at the beginning of the periods was $9,241 and $5,615 , respectively. Remaining Performance Obligations The remaining performance obligations represent the aggregate transaction price of executed contracts with customers for which work has partially been performed or not started as of the end of the reporting period. The Company’s remaining performance obligations include projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions. T&M contracts are excluded from the remaining performance obligation as these contracts are not fixed price contracts and the consideration expected under these contracts is variable as it is based upon hours and costs incurred in accordance with the variable consideration optional exemption. As of March 31, 2019 , the aggregate amount of the transaction price allocated to remaining performance obligations was $97,295 . During the following 12 months, approximately 61% of the remaining performance obligations are expected to be recognized as revenue with the remaining balance recognized over 1 to 5 years.

Accounts Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Accounts Receivable	Accounts Receivable The components of accounts receivable are as follows: March 31, 2019 December 31, 2018 Billed $ 152,969 $ 155,540 Unbilled * 31,325 32,546 184,294 188,086 Allowance for doubtful accounts (71,685 ) (70,617 ) Accounts receivable, less allowance for doubtful accounts $ 112,609 $ 117,469 * Amount is net of unbilled reserves.

Intangible Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets The following table summarizes the Company’s acquired intangible assets: March 31, 2019 December 31, 2018 Gross Accumulated Gross Accumulated Client relationships $ 4,532 $ 3,367 $ 4,591 $ 3,275 Total $ 4,532 $ 3,367 $ 4,591 $ 3,275 Intangible assets, net $ 1,165 $ 1,316 Amortization expense related to intangible assets was as follows: Three Months Ended March 31, 2019 2018 $ 114 $ 343 The following table presents the estimated amortization expense for the next five years: Estimated Amortization Expense Year ending December 31, 2019 (remaining 9 months) $ 343 2020 195 2021 167 2022 167 2023 167

Goodwill

Goodwill	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill The following table summarizes the changes in the Company’s carrying value of goodwill during 2019 : Balance, December 31, 2018 $ 48,869 Translation adjustments (1) (529 ) Balance, March 31, 2019 $ 48,340 (1) The translation adjustment was calculated based on the foreign currency exchange rates as of March 31, 2019 . The Company performed its 2018 annual impairment test effective July 1, 2018 and noted no impairment. Based on the valuation as of July 1, 2018, the fair value of the Company substantially exceeded its carrying value. The Company also noted no indications of impairment were present at March 31, 2019 requiring reassessment. In the future, the Company will continue to perform the annual test during its fiscal third quarter unless events or circumstances indicate an impairment may have occurred before that time.

Accounts Payable and Accrued Ex

Accounts Payable and Accrued Expenses	3 Months Ended
	Mar. 31, 2019
Payables and Accruals [Abstract]
Accounts Payable and Accrued Expenses	Accounts Payable and Accrued Expenses Below are the components of accounts payable and accrued expenses: March 31, 2019 December 31, 2018 Accounts payable $ 33,506 $ 30,005 Accrued payroll and related expenses 29,370 28,915 Accrued subcontractor fees 13,188 13,447 Accrued agency fees 348 237 Accrued legal and professional fees 2,403 2,277 Other accrued expenses 8,053 5,155 $ 86,868 $ 80,036

Notes Payable and Long-Term Deb

Notes Payable and Long-Term Debt	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Notes Payable and Long-Term Debt	Notes Payable and Long-Term Debt The table below reflects the Company's notes payable and long-term debt, which includes credit facilities: Interest Rate (1) Balance Outstanding as of Loan Maturity Interest Rate Type March 31, December 31, March 31, December 31, Secured Credit Facilities Hill International, Inc. - Société Générale 2017 Term Loan Facility 06/20/2023 Variable 7.86% 7.62% $ 29,475 $ 29,550 Hill International, Inc. - Société Générale Domestic Revolving Credit Facility 05/04/2022 Variable 6.37% 6.31% 13,900 14,400 Hill International N.V.. - Société Générale International Revolving Credit Facility 05/04/2022 Variable 5.97% N/A 1,178 — Unsecured Credit Facilities Hill International, Inc. - First Abu Dhabi Bank ("FAB") PJSC Overdraft Credit Facility (2) 04/18/2020 Variable 5.58% 5.58% 2,779 2,461 Hill International Brasil S.A. - Revolving Credit Facility (3) 05/13/2019 Fixed 3.35% 3.35% 175 — Unsecured Notes Payable and Long-Term Debt Hill International Spain SA-Bankia S.A. & Bankinter S.A.(4) 12/31/2021 Fixed 2.17% 2.17% 1,435 1,594 Hill International Spain SA - IberCaja Banco. S.A. (4) 12/31/2019 Variable 3.45% 3.41% 146 198 Philadelphia Industrial Development Corporation Loan 03/31/2027 Fixed 2.75% 2.75% 527 542 Total notes payable and long-term debt, gross $ 49,615 $ 48,745 Less: unamortized discount and deferred financing costs related to Société Générale 2017 Term Loan Facility (756 ) (794 ) Notes payable and long-term debt $ 48,859 $ 47,951 Current portion of notes payable 3,954 3,538 Current portion of unamortized debt discount and deferred financing costs (176 ) (174 ) Current maturities of notes payable and long-term debt 3,778 3,364 Notes payable and long-term debt, net of current maturities 45,081 44,587 (1) Interest rates for variable interest rate debt are reflected on a weighted average basis through March 31, 2019 since inception. (2) Credit facility lender was formerly known as National Bank of Abu Dhabi. There is no stated maturity date, however, the loan is subject to annual review in April of each year, or at any other time as determined by FAB. Therefore, the amount outstanding is reflected within the current maturities of notes payable and long-term debt. Balances outstanding are reflected in U.S. dollars based on the conversion rates from AED as of March 31, 2019 and December 31, 2018 . The Company had $352 of availability under the credit facility as of March 31, 2019 . (3) The unsecured Hill International Brasil S.A. revolving credit facilities were previously held with two banks in Brazil under four separate arrangements and were subject to automatic renewal on a monthly basis. In October 2018, three of the credit facilities were not renewed. The Company had $335 of availability under the credit facility as of March 31, 2019 . The amounts outstanding and available are based on conversion rates from Brazilian Real. (4) Balances outstanding are reflected in U.S. dollars based on the conversion rates from Euros as of March 31, 2019 and December 31, 2018 . Secured Credit Facilities The Company's secured credit facilities with Société Générale under the 2017 Term Loan and the Domestic Revolving Credit Facility (collectively, the "U.S. Credit Facilities") and under the International Revolving Credit Facility contain customary default provisions, representations and warranties, and affirmative and negative covenants, and require the Company to comply with certain financial and reporting covenants. The financial covenant is comprised of a maximum Consolidated Net Leverage Ratio of 3.00 to 1.00 for any fiscal quarter ending on or subsequent to March 31, 2017 for the trailing twelve months then-ended. The Consolidated Net Leverage Ratio is the ratio of (a) consolidated total debt (minus unrestricted cash and cash equivalents) to consolidated earnings before interest, taxes, depreciation, amortization, share-based compensation and other non-cash charges, including bad debt expense, certain one-time litigation and transaction related expenses, and restructuring charges for the trailing twelve months. In the event of a default, the U.S. Lender and the International Lender may increase the interest rates by 2.0% . The Company was in compliance with this financial covenant at March 31, 2019 . The unamortized debt issuance costs under the Domestic and International Revolving Credit Facilities were $1,738 and $1,879 at March 31, 2019 and December 31, 2018 , respectively, and were included in other assets in the consolidated balance sheet. Commitment fees are calculated at 0.50% annually on the average daily unused portion of the Domestic Revolving Credit Facility, and are calculated at 0.75% annually on the average daily unused portion of the International Revolving Credit Facility. Generally, the obligations of the Company under the Domestic Revolving Credit Facility are secured by a first-priority security interest in the Eligible Domestic Receivables, cash proceeds and bank accounts of the Company and certain of the Company’s U.S. subsidiaries, and a second-priority security interest in substantially all other assets of the Company and such subsidiaries. The obligations of the Subsidiary under the International Revolving Credit Facility are generally secured by a first-priority security interest in substantially all accounts receivable and cash proceeds thereof, certain bank accounts of the Subsidiary and certain of the Company’s non-U.S. subsidiaries, and a second-priority security interest in substantially all other assets of the Company and certain of the Company’s U.S. and non-U.S. subsidiaries. At March 31, 2019 , the Company had $10,995 of outstanding letters of credit and $105 of available borrowing capacity under the Domestic Revolving Credit Facility, based on the maximum borrowing capacity of $25,000 . At March 31, 2019 , the Company had $2,618 of outstanding letters of credit and $165 of available borrowing capacity under the International Revolving Credit Facility. The availability under the International Revolving Credit Facility as of March 31, 2019 was reduced from the maximum borrowing capacity of €9,156 ( $10,273 as of March 31, 2019 ) to €3,530 ( $3,961 as of March 31, 2019 ).

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Share-Based Compensation At March 31, 2019 , the Company had approximately 1,417 options outstanding with a weighted average exercise price of $4.33 . The Company did not grant any stock options during the three months ended March 31, 2019 . During the three months ended March 31, 2019 , options for approximately 525 shares with a weighted average exercise price of $4.42 lapsed. During the three months ended March 31, 2019 , the Company granted certain employees and executive officers equity awards in the form of restricted stock units ("RSU") that are subject to a combination of time and performance-based conditions under the 2017 Equity Compensation Plan (the "2017 Plan"), totaling 758 RSU's. Each RSU entitles each grantee one unit of the Company's common stock. The time-based RSU's vest annually over a three -year period on each anniversary date of the grant. Any unvested time-based RSU's will be forfeited if the grantee separates from the Company prior the vesting date. The related compensation expense is recorded based on a weighted average common stock price of $3.23 and was deemed as equity-classified awards. The number of common shares to be issued under the performance-based RSU's will be determined based on three levels of performance metrics based on the Company's earnings and will be assessed on an annual basis for the years ended December 31, 2019, 2020 and 2021. If the Company meets the performance metrics for any one of the measurement periods, such units will vest on the next anniversary date of the grant date. All vested RSU's will be settled on the third anniversary of the grant date. Any unvested RSU's are subject to forfeiture if the grantee separates from the Company prior to each vesting date. During the three months ended March 31, 2019 , the Company determined it was not probable that the target performance metric would be met and, therefore, did not record any share-based compensation expense related to such RSU's. The Company recognized total share-based compensation expense in selling, general and administrative expenses in the consolidated statement of operations totaling approximately $241 and $408 for the three months ended March 31, 2019 and 2018 , respectively.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company calculates the interim tax expense based on an annual effective tax rate (AETR). The AETR represents the Company’s estimated effective tax rate for the year based on full year projection of tax expense, divided by the projection of full year pretax book income/(loss) among the various foreign tax jurisdictions, adjusted for discrete transactions occurring during the period. The effective tax rates for the three months ended March 31, 2019 and 2018 were (112.5)% and (16.7)% , respectively. The Company’s effective tax rate for the three months ended March 31, 2019 changed from the comparable period of 2018 , primarily due to the mix of pretax earnings in jurisdictions with different jurisdictional tax rates, as well as not having the ability to benefit from losses in jurisdictions that have a history of negative earnings. The 2017 Tax Act reduced the U.S. statutory tax rate from 35% to 21% beginning in 2018. The 2017 Tax Act requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and introduces a new U.S. tax on certain off-shore earnings referred to as Global Intangible Low-Taxed Income (GILTI) beginning in 2018. The reserve for uncertain tax positions amounted to $3,050 and $2,988 at March 31, 2019 and December 31, 2018 , respectively, and is included in “Other liabilities” in the consolidated balance sheet at those dates. The Company’s policy is to record income tax related interest and penalties in income tax expense. The Company recorded tax related interest and penalties of $2 and $15 for the three months ended March 31, 2019 and 2018, respectively In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that all, or some portion, of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities and projected future taxable income in making this assessment. Management evaluates the need for valuation allowances on the deferred tax assets according to the provisions of ASC 740, Income Taxes. In making this determination, management assesses all available evidence, both positive and negative, at the balance sheet date. This includes, but is not limited to, recent earnings, internally-prepared income projections, and historical financial performance.

Segment and Related Information

Segment and Related Information	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Segment and Related Information	Segment and Related Information The Company operates as one reporting segment which reflects how the Company is managed, which provides construction and project management services to construction owners worldwide. Such services include program management, project management, construction management, project management oversight, troubled project turnaround, staff augmentation, project labor agreement consulting, commissioning, estimating and cost management, labor compliance services (collectively, "integrated project management") and facilities management services. The following tables present certain information for operations: Revenue by Geographic Region: Three Months Ended March 31, 2019 2018 United States $ 48,092 48.7 % $ 51,572 45.2 % Latin America 2,434 2.5 % 2,812 2.5 % Europe 11,344 11.5 % 10,457 9.2 % Middle East 28,311 28.7 % 40,298 35.4 % Africa 6,949 7.0 % 6,703 5.9 % Asia/Pacific 1,553 1.6 % 2,055 1.8 % Total $ 98,683 100.0 % $ 113,897 100.0 % For the three months ended March 31, 2019 , the United States and United Arab Emirates were the only countries to account for 10% or more of consolidated total revenue. For the three months ended March 31, 2018, the United States was the only country to account for 10% or more of consolidated total revenue. Operating Profit (Loss): Three Months Ended 2019 2018 United States $ 4,033 $ 7,333 Latin America (96 ) (304 ) Europe * (1,935 ) 2,158 Middle East * 3,377 (4,226 ) Africa 2,412 669 Asia/Pacific * (285 ) (337 ) Corporate (6,967 ) (10,533 ) Total $ 539 $ (5,240 ) * includes Hill's share of loss (profit) of equity method affiliates on the Consolidated Statements of Operations. Depreciation and Amortization Expense: Three Months Ended 2019 2018 Project Management $ 774 $ 1,059 Corporate 17 232 Total $ 791 $ 1,291 Revenue By Client Type: Three Months Ended March 31, 2019 2018 U.S. federal government $ 4,692 4.8 % $ 3,872 3.4 % U.S. state, regional and local governments 30,895 31.3 % 33,551 29.5 % Foreign governments 25,679 26.0 % 33,806 29.7 % Private sector 37,417 37.9 % 42,668 37.4 % Total $ 98,683 100.0 % $ 113,897 100.0 % Property, Plant and Equipment, Net, by Geographic Location: March 31, 2019 December 31, 2018 United States $ 8,700 $ 8,416 Latin America 662 692 Europe 506 503 Middle East 913 962 Africa 102 105 Asia/Pacific 101 109 Total $ 10,984 $ 10,787

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings From time to time, the Company is a defendant or plaintiff in various legal proceedings which arise in the normal course of business. As such the Company is required to assess the likelihood of any adverse outcomes to these proceedings as well as potential ranges of probable losses. A determination of the amount of the provision required for commitments and contingencies, if any, which would be charged to earnings, is made after careful analysis of each proceeding. The provision may change in the future due to new developments or changes in circumstances. Changes in the provision could increase or decrease the Company’s earnings in the period the changes are made. It is the opinion of management, after consultation with legal counsel, that the ultimate resolution of these proceedings will not have a material adverse effect on the Company’s financial condition, results of operations or cash flows. Knowles Limited (“Knowles”), a subsidiary of the Company, is a party to an arbitration proceeding instituted on July 8, 2014 in which Knowles claimed that it was entitled to payment for services rendered to Celtic Bioenergy Limited (“Celtic”). The arbitrator decided in favor of Knowles. The arbitrator’s award was appealed by Celtic to the U.K. High Court of Justice, Queen’s Bench Division, Technology and Construction Court (“Court”). On March 16, 2017, the Court (1) determined that certain relevant facts had been deliberately withheld from the arbitrator by an employee of Knowles and (2) remitted the challenged parts of the arbitrator’s award back to the arbitrator to consider the award in possession of the full facts. The Company is evaluating the impact of the judgment of the Court. In September 2017, the Board appointed a special committee of independent directors (the “Special Committee”) to conduct a review of the need for, and causes of, the restatement of the Company’s financial statements. The review was performed with the assistance of independent outside counsel and was completed in April 2018. The review discovered facts that indicated certain former employees of the Company violated Company policies related to accounting for foreign currency exchange transactions. The Company self-reported these facts to the SEC in April 2018 and received a subpoena from the SEC in June 2018. The Company has cooperated and continues to cooperate with the SEC with respect to the SEC’s investigation. Loss on Performance Bond On February 8, 2018, the Company received notice from the First Abu Dhabi Bank ("FAB", formerly known as the National Bank of Abu Dhabi) that Public Authority of Housing Welfare of Kuwait submitted a claim for payment on a Performance Guarantee issued by the Company for approximately $7,938 for a project located in Kuwait. FAB subsequently issued, on behalf of the Company, a payment on February 15, 2018. The Company is taking legal action to recover the full Performance Guarantee amount. On September 20, 2018 the Kuwait First Instance Court dismissed the Company's case. The Company filed an appeal before the Kuwait Court of Appeals seeking referral of the matter to a panel of experts for determination. On April 21, 2019, the Court of Appeals ruled to refer the matter to the Kuwait Experts Department. As a result of the First Instance Court decision, the Company fully reserved the performance guarantee payment above in the first quarter of 2018 and it is presented as "Loss on Performance Bond" on the consolidated statements of operations. Other The Company has identified a potential tax liability related to certain foreign subsidiaries’ failure to comply with laws and regulations of the jurisdictions, outside of their home country, in which their employees provided services. The Company has estimated the potential liability to be approximately $630 and is included in other liabilities in the consolidated balance sheet at March 31, 2019 .

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Operating Leases	Operating Leases The Company leases office space, equipment and vehicles throughout the world. Leases with an initial term of 12 months or less are not recorded in the consolidated balance sheet as of . Many of the Company's operating leases include one or more options to renew at the Company's sole discretion. The lease renewal option terms generally range from 1 month to 5 years for office leases. The determination of whether to include any renewal options is made by the Company at lease inception when establishing the term of the lease. Rent expense for operating leases is recognized on a straight-line basis over the lease term from the lease commencement date through the scheduled expiration date. Rent expense of approximately $1,986 and $2,239 for the three months ended March 31, 2019 and 2018 , respectively, is included in selling, general and administrative and direct expenses in the consolidated statements of operations. Of the $1,986 in operating lease expense for the three months ended March 31, 2019 , $292 was associated with leases with an initial term of 12 months or less and variable costs. Some of the Company's lease arrangements require periodic increases in the Company's base rent that may be subject to certain economic indexes, among other items. In addition, these leases may require the Company to pay property taxes, utilities and other costs related to several of its leased office facilities. The Company subleases certain real estate to third parties. The sublease income recognized for the three month ended March 31, 2019 was $143 . The following is a schedule, by years, of maturities of lease liabilities as of March 31, 2019 : Total Operating Lease Payments 2019 (excluding the three months ended March 31, 2019) $ 5,205 2020 6,157 2021 4,564 2022 3,497 2023 2,725 Thereafter 6,933 Total minimum lease payments (1) (2) 29,081 Less amount representing imputed interest 5,072 Present value of lease obligations $ 24,009 Weighted average remaining lease term (years) 5.51 Weighted average discount rate 6.87 % (1) Partially includes rent expense amounts payable in various foreign currencies and and are based on the spot foreign currency exchange rate for the month ended March 31, 2019 , where applicable. (2) Includes leases and renewals that were executed and have yet to commence as of March 31, 2019 .

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary	Summary The accompanying unaudited interim consolidated financial statements were prepared in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") pertaining to reports on Form 10-Q and should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 . Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles ("U.S. GAAP") for complete financial statements. In the opinion of management, these statements include all adjustments (consisting only of normal, recurring adjustments) necessary for a fair presentation of the consolidated financial statements. The consolidated financial statements include the accounts of Hill and its wholly- and majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The interim operating results are not necessarily indicative of the results for a full year.
Construction Claims Group Sale	Construction Claims Group Sale On December 20, 2016, the Company and its subsidiary Hill International N.V. (“Hill N.V.” and, collectively with the Company, the “Sellers”) entered into a Stock Purchase Agreement (as amended on May 3, 2017, the “Agreement”) with Liberty Mergeco, Inc. (the “US Purchaser”) and Liberty Bidco UK Limited (the “UK Purchaser” and, collectively with the US Purchaser, the “Purchasers”) pursuant to which the Purchasers were to acquire the Construction Claims Group by the US Purchaser’s acquisition of all of the stock of Hill International Consulting, Inc. from the Company and the UK Purchaser’s acquisition of all of the stock of Hill International Consulting B.V. from Hill N.V. The Construction Claims Group sale closed on May 5, 2017. For a detailed description of the transaction, see "Note 5 Discontinued Operations" in the Company's 2018 Annual Report on Form 10-K for the year ended December 31, 2018 , filed with the SEC on April 1, 2019 .
Reclassifications	Reclassification A reclassification was made in the presentation of the consolidated statement of operations for the three months ended March 31, 2018. The Company moved $1,577 related to the middle east vacation expense accrual from direct expense and included it in selling, general and administrative expenses to conform to current year presentation.
Foreign Currency Translations and Transactions	Foreign Currency Translations and Transactions Assets and liabilities of all foreign operations are translated at period-end rates of exchange while revenues and expenses are translated at the average monthly exchange rates. Gains or losses resulting from translating foreign currency financial statements are accumulated in a separate component of stockholders’ equity entitled accumulated other comprehensive loss until the entity is sold or substantially liquidated. Gains or losses arising from foreign currency transactions (transactions denominated in a currency other than the entity’s local currency), including those resulting from intercompany transactions, are reflected in selling, general and administrative expenses in the consolidated statement of operations. The impact of foreign exchange on long-term intercompany loans, for which repayment has not been scheduled or planned, are recorded in accumulated other comprehensive loss on the consolidated balance sheet.
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash investments and accounts receivable. The Company maintains its cash accounts with high quality financial institutions. Although the Company believes that the financial institutions with which it does business will be able to fulfill their commitments, there is no assurance that those institutions will be able to continue to do so. No single client accounted for 10% or more of revenue for the three months ended March 31, 2019 or 2018 . There was 1 client in the Middle East who contributed 10% or more to accounts receivable at March 31, 2019 and December 31, 2018, respectively which represents 18% and 17% of the accounts receivable balance at March 31, 2019 and December 31, 2018, respectively.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The allowance for doubtful accounts is an estimate prepared by management based on identification of the collectability of specific accounts and the overall condition of the receivable portfolios. When evaluating the adequacy of the allowance for doubtful accounts, the Company specifically analyzes trade receivables, including retainage receivable, historical bad debts, client credits, client concentrations, client credit worthiness, current economic trends and changes in client payment terms. If the financial condition of clients were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. Likewise, should the Company determine that it would be able to realize more of its receivables in the future than previously estimated, an adjustment to the allowance would increase earnings in the period such determination was made. The allowance for doubtful accounts is reviewed on a quarterly basis and adjustments are recorded as deemed necessary.
Retainage Receivable and Revenue Recognition	Retainage Receivable Retainage receivable represents balances billed but not paid by clients pursuant to retainage provisions in certain contracts and will be due upon completion of specific tasks or the completion of the contract. Revenue Recognition The Company generates revenue primarily from providing professional services to its clients under various types of contracts. In providing these services, the Company may incur reimbursable expenses, which consist principally of amounts paid to subcontractors and other third parties and travel and other job related expenses that are contractually reimbursable from clients. The Company includes reimbursable expenses in computing and reporting its total revenue as long as the Company remains responsible to the client for the fulfillment of the contract and for the overall acceptability of all services provided. If estimated total costs on any contract project a loss, the Company charges the entire estimated loss to operations in the period the loss becomes known. The cumulative effect of revisions to revenue, estimated costs to complete contracts, including penalties, incentive awards, change orders, claims, anticipated losses, and others are recorded in the accounting period in which the events indicating a loss are known and the loss can be reasonably estimated. These loss projects are re-assessed for each subsequent reporting period until the project is complete. Such revisions could occur at any time and the effects may be material. See footnote 4, "Revenue from Contracts with Customers," for more detail, regarding how the Company recognizes revenue under each type of its contractual arrangements.
Restricted Cash	Restricted cash primarily represents cash collateral required to be maintained in foreign bank accounts to serve as collateral for letters of credit, bonds or guarantees on certain projects. The cash will remain restricted until the respective project has been completed, which typically is greater than one year.
Income Taxes	Income Taxes The Company estimates income taxes in each of the jurisdictions in which it operates. This process involves estimating its actual current tax exposure together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within the Company’s consolidated balance sheets. The Company assesses the likelihood that the deferred tax assets will be recovered from future taxable income and to the extent it believes recovery is not likely, the Company establishes a valuation allowance. To the extent the Company establishes a valuation allowance in a period, it must include an expense within the tax provision in the consolidated statements of operations. The Company has recorded a valuation allowance to reduce the deferred tax asset to an amount that is more likely than not to be realized in future years. If the Company determines in the future that it is “more likely than not” (i.e., a likelihood greater than 50 percent) to be allowed by the tax jurisdiction based solely on the technical merits of the position, that the deferred tax assets subject to the valuation allowance will be realized, then the previously provided valuation allowance will be adjusted. The Company recognizes a tax benefit in the financial statements for an uncertain tax position only if management’s assessment is that the position is more likely than not that the benefit will be ultimately realized. The term “tax position” refers to a position in a previously filed tax return or a position expected to be taken in a future tax return that is reflected in measuring current or deferred income tax assets and liabilities for interim or annual periods.
Earnings (loss) per Share	Earnings (loss) per Share Basic earnings (loss) per common share have been computed using the weighted-average number of shares of common stock outstanding during the period. Diluted earnings (loss) per common share incorporates the incremental shares issuable upon the assumed exercise of stock options, the assumed vesting of stock and deferred and restricted stock unit awards using the treasury stock method, if dilutive. The Company has outstanding options to purchase approximately 1,417 shares and 5,339 shares at March 31, 2019 and 2018 , respectively. In addition, the Company had 471 restricted stock units outstanding at March 31, 2019 . These awards were excluded from the calculation of diluted earnings (loss) per share for the three months ended March 31, 2019 because they were antidilutive due to the Company's net loss from continuing operations. The following table provides a reconciliation to net earnings (loss) used in the numerator for earnings (loss) per share from continuing operations attributable to Hill: Three Months Ended March 31, 2019 2018 Loss from continuing operations $ (2,068 ) $ (7,669 ) Less: net earnings - noncontrolling interest 67 (2 ) Net loss from continuing operations attributable to Hill $ (2,135 ) $ (7,667 )
New Accounting Pronouncements	New Accounting Pronouncements Changes to U.S. GAAP are typically established by the Financial Accounting Standards Board (“FASB”) in the form of accounting standards updates (“ASUs”) to the FASB’s Accounting Standards Codification (“ASC”). The Company considers the applicability and impact of all ASUs and, based on its assessment, determined that any recently issued or proposed ASUs not listed below are either not applicable to the Company or adoption will have minimal impact on its consolidated financial statements. For additional information with respect to new accounting pronouncements and the impact of these pronouncements on our consolidated financial statements, see Note 3 to the consolidated financial statements in Item 8 of Form 10K for the year ended December 31, 2018 filed with the SEC on April 1, 2019 . See update below. Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-2, Leases (Topic 842), which required the Company to recognize lease assets and lease liabilities (related to leases previously classified as operating under previous U.S. GAAP) on its consolidated balance sheet for all leases in excess of one year in duration. The ASU was effective for the Company on January 1, 2019. The adoption of this ASU impacted the Company’s financial statements in that all existing leases were recorded as right-of-use ("ROU") assets and liabilities on the balance sheet. The Company elected to adopt the ASU 2016-2 using the modified retrospective method and, therefore, have not recast comparative periods presented in its unaudited consolidated financial statements. The Company elected the package of transition practical expedients for existing leases and therefore the Company has not reassessed the following: lease classification for existing leases, whether any existing contracts contained leases, if any initial direct costs were incurred and whether existing land easements should be accounted for as leases. The Company did not apply the hindsight practical expedient, accordingly, the Company did not use hindsight in its assessment of lease terms,. As permitted under ASU 2016-2, the Company elected as accounting policy elections to not recognize ROU assets and related lease liabilities for leases with terms of twelve months or less and to not separate lease and non-lease components, and instead account for the non-lease components together with the lease components as a single lease component. In connection with the adoption of the new standard, the Company recorded $16,876 of operating lease right of use assets and $23,309 of operating lease liabilities as of January 1, 2019. See Note 14 of this Form 10-Q for additional information and required disclosures. Under Topic 842, the Company determined if an arrangement is a lease at inception. ROU assets and liabilities are recognized at commencement date based on the present value of remaining lease payments over the lease term. For this purpose, the Company considers only payments that are fixed and determinable at the time of commencement. As most of the Company's leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The Company's determined incremental borrowing rate is a hypothetical rate based on its understanding of what the Company's credit rating would be. The ROU asset also includes any lease payments made prior to commencement and is recorded net of any lease incentives received and net of the deferred rent balance on the date of implementation. The Company's lease terms may include options to extend or terminate the lease when it is reasonably certain that it will exercise such options. In June 2018, the FASB issued ASU No. 2018-07 , Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting to simplify the accounting for share-based transactions by expanding the scope of Topic 718 from only being applicable to share-based payments to employees to also include share-based payment transactions for acquiring goods and services from nonemployees. As a result, nonemployee share-based transactions will be measured by estimating the fair value of the equity instruments at the grant date, taking into consideration the probability of satisfying performance conditions. This ASU was effective for annual and interim reporting periods beginning after December 15, 2018. Our equity incentive plans limit share-based awards to employees and directors of the Company, therefore, adoption of this standard did not have a material impact on the Company’s consolidated financial statements. On January 1, 2019, the Company adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification , which amended certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders’ equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders’ equity presented in the balance sheet must be provided in a note or separate statement. We have updated our Consolidated Financial Statements to include a reconciliation of the beginning balance to the ending balance of stockholders’ equity for each period for which a statement of comprehensive income is presented. Recently Issued Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments (Topic 326) - Credit Losses: Measurement of Credit Losses on Financial Instruments , which provides guidance regarding the measurement of credit losses on financial instruments. The new guidance replaces the incurred loss impairment methodology in the current guidance with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to determine credit loss estimates. This ASU will be effective for the Company commencing January 1, 2020 with early adoption permitted commencing January 1, 2019. The Company is in the process of assessing the impact of this ASU on our consolidated financial statements and disclosures. In January 2017, the FASB issued ASU 2017-4, Intangibles - Goodwill and Other (Topic 350), which removes step 2 from the goodwill impairment test. As a result, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting units’ fair value. The guidance is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for annual or interim goodwill impairment tests performed on testing dates after January 1, 2017, and the prospective transition method should be applied. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The amendments in this update are effective for public business entities for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption of the amendments in this update is permitted, including adoption in any interim period, for all entities. The amendments in this update should be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is in the process of assessing the impact of this ASU on its consolidated financial statements and does not expect this update to have a material impact on the Company's consolidated financial statements. In October 2018, the FASB issued ASU 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities ("VIE"). The amendments in this ASU for determining whether a decision-making fee is a variable interest require reporting entities to consider indirect interests held through related parties under common control on a proportional basis rather than as the equivalent of a direct interest in its entirety (as currently required by GAAP). These amendments will create alignment between determining whether a decision-making fee is a variable interest and determining whether a reporting entity within a related party group is the primary beneficiary of a VIE. The standard is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2019 for public companies. Early adoption is permitted. The Company is currently determining the impact that adoption of this guidance will have on the financial statements. In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606. This ASU provides guidance on whether certain transactions between collaborative arrangement participants should be accounted for with revenue under Topic 606, specifically when the collaborative arrangement participant is a customer in the context of a unit-of-account. It provides more comparability in the presentation of revenues for certain transactions between collaborative arrangement participants, including adding unit-of-account guidance in Topic 808 to align with the guidance in Topic 606 (that is, a distinct good or service) when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within the scope of Topic 606. The standard is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2019 for public companies. Early adoption is permitted. The Company is currently determining the impact that adoption of this guidance will have on the financial statements.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reconciliation of cash, cash equivalents and restricted cash	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets that sum to the total of the same such amounts shown in the statements of cash flows: March 31, 2019 March 31, 2018 Cash and cash equivalents $ 25,746 $ 18,711 Cash - restricted 2,041 2,945 Cash - restricted, net of current portion 2,832 1,451 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows 30,619 23,107
Reconciliation of cash, cash equivalents and restricted cash	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets that sum to the total of the same such amounts shown in the statements of cash flows: March 31, 2019 March 31, 2018 Cash and cash equivalents $ 25,746 $ 18,711 Cash - restricted 2,041 2,945 Cash - restricted, net of current portion 2,832 1,451 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows 30,619 23,107
Schedule of Earnings Per Share	The following table provides a reconciliation to net earnings (loss) used in the numerator for earnings (loss) per share from continuing operations attributable to Hill: Three Months Ended March 31, 2019 2018 Loss from continuing operations $ (2,068 ) $ (7,669 ) Less: net earnings - noncontrolling interest 67 (2 ) Net loss from continuing operations attributable to Hill $ (2,135 ) $ (7,667 )

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The components of the Company’s revenue by contract type and geographic region for the three months ended March 31, 2019 and 2018 are as follows: Three Months Ended March 31, 2019 Fixed Price T&M Total Percent of revenue United States $ 3,433 $ 44,659 $ 48,092 48.7 % Latin America 2,016 418 2,434 2.5 % Europe 6,051 5,293 11,344 11.5 % Middle East 11,365 16,946 28,311 28.7 % Africa 571 6,378 6,949 7.0 % Asia/Pacific 300 1,253 1,553 1.6 % Total $ 23,736 $ 74,947 $ 98,683 100.0 % Three Months Ended March 31, 2018 Fixed Price T&M Total Percent of revenue United States $ 3,056 $ 48,516 $ 51,572 45.2 % Latin America 1,821 991 2,812 2.5 % Europe 4,803 5,654 10,457 9.2 % Middle East 17,804 22,494 40,298 35.4 % Africa 38 6,665 6,703 5.9 % Asia/Pacific 581 1,474 2,055 1.8 % Total $ 28,103 $ 85,794 $ 113,897 100.0 %

Accounts Receivable (Tables)

Accounts Receivable (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Schedule of components of accounts receivable	The components of accounts receivable are as follows: March 31, 2019 December 31, 2018 Billed $ 152,969 $ 155,540 Unbilled * 31,325 32,546 184,294 188,086 Allowance for doubtful accounts (71,685 ) (70,617 ) Accounts receivable, less allowance for doubtful accounts $ 112,609 $ 117,469 * Amount is net of unbilled reserves.

Intangible Assets (Tables)

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of acquired intangible assets	The following table summarizes the Company’s acquired intangible assets: March 31, 2019 December 31, 2018 Gross Accumulated Gross Accumulated Client relationships $ 4,532 $ 3,367 $ 4,591 $ 3,275 Total $ 4,532 $ 3,367 $ 4,591 $ 3,275 Intangible assets, net $ 1,165 $ 1,316
Summary of amortization expense related to intangible assets	Amortization expense related to intangible assets was as follows: Three Months Ended March 31, 2019 2018 $ 114 $ 343
Summary of estimated amortization expense of intangible assets for the next five years	The following table presents the estimated amortization expense for the next five years: Estimated Amortization Expense Year ending December 31, 2019 (remaining 9 months) $ 343 2020 195 2021 167 2022 167 2023 167

Goodwill (Tables)

Goodwill (Tables)	3 Months Ended
	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of changes in the Company's carrying value of goodwill	The following table summarizes the changes in the Company’s carrying value of goodwill during 2019 : Balance, December 31, 2018 $ 48,869 Translation adjustments (1) (529 ) Balance, March 31, 2019 $ 48,340 (1) The translation adjustment was calculated based on the foreign currency exchange rates as of March 31, 2019 .

Accounts Payable and Accrued _2

Accounts Payable and Accrued Expenses (Tables)	3 Months Ended
	Mar. 31, 2019
Payables and Accruals [Abstract]
Schedule of components of accounts payable and accrued expenses	Below are the components of accounts payable and accrued expenses: March 31, 2019 December 31, 2018 Accounts payable $ 33,506 $ 30,005 Accrued payroll and related expenses 29,370 28,915 Accrued subcontractor fees 13,188 13,447 Accrued agency fees 348 237 Accrued legal and professional fees 2,403 2,277 Other accrued expenses 8,053 5,155 $ 86,868 $ 80,036

Notes Payable and Long-Term D_2

Notes Payable and Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2019
Debt Disclosure [Abstract]
Summary of outstanding debt obligations	The table below reflects the Company's notes payable and long-term debt, which includes credit facilities: Interest Rate (1) Balance Outstanding as of Loan Maturity Interest Rate Type March 31, December 31, March 31, December 31, Secured Credit Facilities Hill International, Inc. - Société Générale 2017 Term Loan Facility 06/20/2023 Variable 7.86% 7.62% $ 29,475 $ 29,550 Hill International, Inc. - Société Générale Domestic Revolving Credit Facility 05/04/2022 Variable 6.37% 6.31% 13,900 14,400 Hill International N.V.. - Société Générale International Revolving Credit Facility 05/04/2022 Variable 5.97% N/A 1,178 — Unsecured Credit Facilities Hill International, Inc. - First Abu Dhabi Bank ("FAB") PJSC Overdraft Credit Facility (2) 04/18/2020 Variable 5.58% 5.58% 2,779 2,461 Hill International Brasil S.A. - Revolving Credit Facility (3) 05/13/2019 Fixed 3.35% 3.35% 175 — Unsecured Notes Payable and Long-Term Debt Hill International Spain SA-Bankia S.A. & Bankinter S.A.(4) 12/31/2021 Fixed 2.17% 2.17% 1,435 1,594 Hill International Spain SA - IberCaja Banco. S.A. (4) 12/31/2019 Variable 3.45% 3.41% 146 198 Philadelphia Industrial Development Corporation Loan 03/31/2027 Fixed 2.75% 2.75% 527 542 Total notes payable and long-term debt, gross $ 49,615 $ 48,745 Less: unamortized discount and deferred financing costs related to Société Générale 2017 Term Loan Facility (756 ) (794 ) Notes payable and long-term debt $ 48,859 $ 47,951 Current portion of notes payable 3,954 3,538 Current portion of unamortized debt discount and deferred financing costs (176 ) (174 ) Current maturities of notes payable and long-term debt 3,778 3,364 Notes payable and long-term debt, net of current maturities 45,081 44,587 (1) Interest rates for variable interest rate debt are reflected on a weighted average basis through March 31, 2019 since inception. (2) Credit facility lender was formerly known as National Bank of Abu Dhabi. There is no stated maturity date, however, the loan is subject to annual review in April of each year, or at any other time as determined by FAB. Therefore, the amount outstanding is reflected within the current maturities of notes payable and long-term debt. Balances outstanding are reflected in U.S. dollars based on the conversion rates from AED as of March 31, 2019 and December 31, 2018 . The Company had $352 of availability under the credit facility as of March 31, 2019 . (3) The unsecured Hill International Brasil S.A. revolving credit facilities were previously held with two banks in Brazil under four separate arrangements and were subject to automatic renewal on a monthly basis. In October 2018, three of the credit facilities were not renewed. The Company had $335 of availability under the credit facility as of March 31, 2019 . The amounts outstanding and available are based on conversion rates from Brazilian Real. (4) Balances outstanding are reflected in U.S. dollars based on the conversion rates from Euros as of March 31, 2019 and December 31, 2018 .

Segment and Related Informati_2

Segment and Related Information (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Region	Revenue by Geographic Region: Three Months Ended March 31, 2019 2018 United States $ 48,092 48.7 % $ 51,572 45.2 % Latin America 2,434 2.5 % 2,812 2.5 % Europe 11,344 11.5 % 10,457 9.2 % Middle East 28,311 28.7 % 40,298 35.4 % Africa 6,949 7.0 % 6,703 5.9 % Asia/Pacific 1,553 1.6 % 2,055 1.8 % Total $ 98,683 100.0 % $ 113,897 100.0 %
Schedule of Operating Profit (Loss)	Operating Profit (Loss): Three Months Ended 2019 2018 United States $ 4,033 $ 7,333 Latin America (96 ) (304 ) Europe * (1,935 ) 2,158 Middle East * 3,377 (4,226 ) Africa 2,412 669 Asia/Pacific * (285 ) (337 ) Corporate (6,967 ) (10,533 ) Total $ 539 $ (5,240 ) * includes Hill's share of loss (profit) of equity method affiliates on the Consolidated Statements of Operations.
Schedule of Depreciation and Amortization Expense	Depreciation and Amortization Expense: Three Months Ended 2019 2018 Project Management $ 774 $ 1,059 Corporate 17 232 Total $ 791 $ 1,291
Schedule of Revenue By Client Type	Revenue By Client Type: Three Months Ended March 31, 2019 2018 U.S. federal government $ 4,692 4.8 % $ 3,872 3.4 % U.S. state, regional and local governments 30,895 31.3 % 33,551 29.5 % Foreign governments 25,679 26.0 % 33,806 29.7 % Private sector 37,417 37.9 % 42,668 37.4 % Total $ 98,683 100.0 % $ 113,897 100.0 %
Schedule of Property, Plant and Equipment, Net by Geographic Location	Property, Plant and Equipment, Net, by Geographic Location: March 31, 2019 December 31, 2018 United States $ 8,700 $ 8,416 Latin America 662 692 Europe 506 503 Middle East 913 962 Africa 102 105 Asia/Pacific 101 109 Total $ 10,984 $ 10,787

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Maturities of Operating Lease Liabilities	The following is a schedule, by years, of maturities of lease liabilities as of March 31, 2019 : Total Operating Lease Payments 2019 (excluding the three months ended March 31, 2019) $ 5,205 2020 6,157 2021 4,564 2022 3,497 2023 2,725 Thereafter 6,933 Total minimum lease payments (1) (2) 29,081 Less amount representing imputed interest 5,072 Present value of lease obligations $ 24,009 Weighted average remaining lease term (years) 5.51 Weighted average discount rate 6.87 % (1) Partially includes rent expense amounts payable in various foreign currencies and and are based on the spot foreign currency exchange rate for the month ended March 31, 2019 , where applicable. (2) Includes leases and renewals that were executed and have yet to commence as of March 31, 2019 .

Liquidity (Details)

Liquidity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Liquidity [Line Items]
Cash and cash equivalents	$ 25,746		$ 18,711
Net Cash Provided by (Used in) Operating Activities	8,458	$ (6,026)
U.S. Revolver | Letters of credit
Liquidity [Line Items]
Available borrowing capacity	105
Foreign credit agreements | International Revolver | Revolving credit facility
Liquidity [Line Items]
Available borrowing capacity	687
Foreign credit agreements | Other Foreign Banks | International Revolver | Revolving credit facility
Liquidity [Line Items]
Available borrowing capacity	$ 165

Basis of Presentation - Concent

Basis of Presentation - Concentration of Credit Risk (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Concentration Risk [Line Items]
Concentration risk	100.00%	100.00%
Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk	100.00%	100.00%
1 Customer | Customer Concentration Risk | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk	18.00%		17.00%

Basis of Presentation - Antidil

Basis of Presentation - Antidilutive Securities (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total number of shares excluded from diluted earnings per common share (in shares)	1,417	5,339
Deferred Stock Units (DSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total number of shares excluded from diluted earnings per common share (in shares)	471	96

Basis of Presentation - Earning

Basis of Presentation - Earnings per Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Loss from continuing operations	$ (2,068)	$ (7,669)
Less: net earnings - noncontrolling interest	67	(2)
Net loss from continuing operations attributable to Hill	$ (2,135)	$ (7,667)

Basis of Presentation - Restric

Basis of Presentation - Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 25,746	$ 18,711
Cash - restricted	2,041	2,945
Cash - restricted, net of current portion	2,832	1,451
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 30,619	$ 23,107

Basis of Presentation - Account

Basis of Presentation - Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 16,771
Operating lease liabilities	$ 24,009
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 16,876
Operating lease liabilities		$ 23,309

Basis of Presentation - Reclass

Basis of Presentation - Reclassification (Details)	3 Months Ended
	Mar. 31, 2018USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amount reclassified to selling, general and administrative expense	$ 1,577

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)segment	Mar. 31, 2018USD ($)
Revenue from Contract with Customer [Abstract]
Number of operating segments | segment	1
Revenue recognized	$ 9,241	$ 5,615
Remaining performance obligations	$ 97,295
Remaining performance obligations, percentage	61.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected term	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected term	4 years

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 98,683	$ 113,897
Percent of revenue	100.00%	100.00%
United States
Disaggregation of Revenue [Line Items]
Revenue	$ 48,092	$ 51,572
Percent of revenue	48.70%	45.20%
Latin America
Disaggregation of Revenue [Line Items]
Revenue	$ 2,434	$ 2,812
Percent of revenue	2.50%	2.50%
Europe
Disaggregation of Revenue [Line Items]
Revenue	$ 11,344	$ 10,457
Percent of revenue	11.50%	9.20%
Middle East
Disaggregation of Revenue [Line Items]
Revenue	$ 28,311	$ 40,298
Percent of revenue	28.70%	35.40%
Africa
Disaggregation of Revenue [Line Items]
Revenue	$ 6,949	$ 6,703
Percent of revenue	7.00%	5.90%
Asia/Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 1,553	$ 2,055
Percent of revenue	1.60%	1.80%
Fixed Price
Disaggregation of Revenue [Line Items]
Revenue	$ 23,736	$ 28,103
Fixed Price | United States
Disaggregation of Revenue [Line Items]
Revenue	3,433	3,056
Fixed Price | Latin America
Disaggregation of Revenue [Line Items]
Revenue	2,016	1,821
Fixed Price | Europe
Disaggregation of Revenue [Line Items]
Revenue	6,051	4,803
Fixed Price | Middle East
Disaggregation of Revenue [Line Items]
Revenue	11,365	17,804
Fixed Price | Africa
Disaggregation of Revenue [Line Items]
Revenue	571	38
Fixed Price | Asia/Pacific
Disaggregation of Revenue [Line Items]
Revenue	300	581
T&M
Disaggregation of Revenue [Line Items]
Revenue	74,947	85,794
T&M | United States
Disaggregation of Revenue [Line Items]
Revenue	44,659	48,516
T&M | Latin America
Disaggregation of Revenue [Line Items]
Revenue	418	991
T&M | Europe
Disaggregation of Revenue [Line Items]
Revenue	5,293	5,654
T&M | Middle East
Disaggregation of Revenue [Line Items]
Revenue	16,946	22,494
T&M | Africa
Disaggregation of Revenue [Line Items]
Revenue	6,378	6,665
T&M | Asia/Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 1,253	$ 1,474

Accounts Receivable - Component

Accounts Receivable - Components of Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Components of accounts receivable
Billed	$ 152,969	$ 155,540
Unbilled	31,325	32,546
Accounts receivable, gross	184,294	188,086
Allowance for doubtful accounts	(71,685)	(70,617)
Accounts receivable, less allowance for doubtful accounts	$ 112,609	$ 117,469

Intangible Assets - Acquired (D

Intangible Assets - Acquired (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Summary of acquired intangible assets
Gross Carrying Amount	$ 4,532	$ 4,591
Accumulated Amortization	3,367	3,275
Intangible assets, net	1,165	1,316
Client relationship
Summary of acquired intangible assets
Gross Carrying Amount	4,532	4,591
Accumulated Amortization	$ 3,367	$ 3,275

Intangible Assets - Amortizatio

Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense related to intangible assets	$ 114	$ 343
Estimated amortization expense of intangible assets for the next five years
2019 (remaining 9 months)	343
2020	195
2021	167
2022	167
2023	$ 167

Goodwill (Details)

Goodwill (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Summary of changes in carrying value of goodwill during 2017
Balance, December 31, 2018	$ 48,869,000
Translation adjustments	(529,000)
Balance, March 31, 2019	48,340,000	$ 48,869,000
Goodwill impairment	$ 0	$ 0

Accounts Payable and Accrued _3

Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Components of accounts payable and accrued expenses
Accounts payable	$ 33,506	$ 30,005
Accrued payroll and related expenses	29,370	28,915
Accrued subcontractor fees	13,188	13,447
Accrued agency fees	348	237
Accrued legal and professional fees	2,403	2,277
Other accrued expenses	8,053	5,155
Accounts payable and accrued expenses, net	$ 86,868	$ 80,036

Notes Payable and Long-Term D_3

Notes Payable and Long-Term Debt - Summary of Outstanding Debt Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total notes payable and long-term debt, gross	$ 49,615	$ 48,745
Less: unamortized discount and deferred financing costs related to Société Générale 2017 Term Loan Facility	(756)	(794)
Notes payable and long-term debt	48,859	47,951
Current portion of notes payable	3,954	3,538
Current portion of unamortized debt discount and deferred financing costs	(176)	(174)
Current maturities of notes payable and long-term debt	3,778	3,364
Notes payable and long-term debt, net of current maturities	$ 45,081	$ 44,587
Hill International, Inc. - Société Générale 2017 Term Loan Facility | Secured Debt
Debt Instrument [Line Items]
Variable interest rate	7.86%	7.62%
Total notes payable and long-term debt, gross	$ 29,475	$ 29,550
Hill International, Inc. - Société Générale Domestic Revolving Credit Facility | Secured Debt
Debt Instrument [Line Items]
Variable interest rate	6.37%	6.31%
Total notes payable and long-term debt, gross	$ 13,900	$ 14,400
Hill International N.V.. - Société Générale International Revolving Credit Facility | Secured Debt
Debt Instrument [Line Items]
Variable interest rate	5.97%
Total notes payable and long-term debt, gross	$ 1,178	$ 0
Hill International, Inc. - First Abu Dhabi Bank (FAB) PJSC Overdraft Credit Facility | Unsecured Debt
Debt Instrument [Line Items]
Variable interest rate	5.58%	5.58%
Total notes payable and long-term debt, gross	$ 2,779	$ 2,461
Available borrowing capacity	$ 352
Hill International Brasil S.A. - Revolving Credit Facility | Unsecured Debt
Debt Instrument [Line Items]
Fixed interest rate	3.35%	3.35%
Total notes payable and long-term debt, gross	$ 175	$ 0
Available borrowing capacity	$ 335
Hill International Spain SA - Bankia, S.A. and Bankinter, S.A | Unsecured Debt
Debt Instrument [Line Items]
Fixed interest rate	2.17%	2.17%
Total notes payable and long-term debt, gross	$ 1,435	$ 1,594
Hill International Spain SA - IberCaja Banco, S.A. | Unsecured Debt
Debt Instrument [Line Items]
Variable interest rate	3.45%	3.41%
Total notes payable and long-term debt, gross	$ 146	$ 198
Philadelphia Industrial Development Corporation Loan | Unsecured Debt
Debt Instrument [Line Items]
Fixed interest rate	2.75%	2.75%
Total notes payable and long-term debt, gross	$ 527	$ 542

Notes Payable and Long-Term D_4

Notes Payable and Long-Term Debt - Term Loan Facilities and Revolving Credit Facilities (Details) € in Thousands	May 05, 2017EUR (€)	Mar. 31, 2019EUR (€)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	May 05, 2017USD ($)
Debt Instrument [Line Items]
Long-term debt			$ 48,859,000	$ 47,951,000
Revolving credit facility | Other Assets
Debt Instrument [Line Items]
Unamortized balances of expenses and fees			1,738,000	$ 1,879,000
Secured Credit Facilities
Debt Instrument [Line Items]
Debt covenant leverage ratio limit	3
Increase in applicable interest rate upon default (as a percent)	2.00%
Revolving credit facility
Debt Instrument [Line Items]
Maximum borrowing capacity	€ 9,156	€ 3,530	3,961,000		$ 10,273,000
U.S. Revolver | Letters of credit
Debt Instrument [Line Items]
Amounts outstanding			10,995,000
Available borrowing capacity			105,000
U.S. Revolver | Revolving credit facility
Debt Instrument [Line Items]
Aggregate principal amount					$ 25,000,000
Unused facility commitment fees percentage	0.50%
International Revolver | Revolving credit facility
Debt Instrument [Line Items]
Unused facility commitment fees percentage	0.75%
International Revolver | Revolving credit facility | Foreign credit agreements
Debt Instrument [Line Items]
Available borrowing capacity			687,000
Other Foreign Banks | International Revolver | Revolving credit facility | Foreign credit agreements
Debt Instrument [Line Items]
Amounts outstanding			2,618,000
Available borrowing capacity			$ 165,000

Share-Based Compensation (Detai

Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 241	$ 408
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	1,417,000
Weighted average exercise price of outstanding options (in dollars per share)	$ 4.33
Options granted (in shares)	758,000
Options lapsed (in shares)	525,000
Weighted average exercise price of options lapsed (in dollars per share)	$ 4.42
Award vesting period	3 years
Granted (in dollars per share)	$ 3.23

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Contingency [Line Items]
Effective income tax rate (as a percent)	(112.50%)	(16.70%)
Income tax expense related to interest and penalties	$ 2	$ 15
Other liabilities
Income Tax Contingency [Line Items]
Reserve for uncertain tax positions	$ 3,050		$ 2,988

Segment and Related Informati_3

Segment and Related Information - Revenue by Geographic Region (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)segment	Mar. 31, 2018USD ($)
Consulting Fee Revenue and Total Revenue by Geographic Region:
Number of reporting units | segment	1
Revenues	$ 98,683	$ 113,897
Percent of revenue	100.00%	100.00%
United States
Consulting Fee Revenue and Total Revenue by Geographic Region:
Revenues	$ 48,092	$ 51,572
Percent of revenue	48.70%	45.20%
Latin America
Consulting Fee Revenue and Total Revenue by Geographic Region:
Revenues	$ 2,434	$ 2,812
Percent of revenue	2.50%	2.50%
Europe
Consulting Fee Revenue and Total Revenue by Geographic Region:
Revenues	$ 11,344	$ 10,457
Percent of revenue	11.50%	9.20%
Middle East
Consulting Fee Revenue and Total Revenue by Geographic Region:
Revenues	$ 28,311	$ 40,298
Percent of revenue	28.70%	35.40%
Africa
Consulting Fee Revenue and Total Revenue by Geographic Region:
Revenues	$ 6,949	$ 6,703
Percent of revenue	7.00%	5.90%
Asia/Pacific
Consulting Fee Revenue and Total Revenue by Geographic Region:
Revenues	$ 1,553	$ 2,055
Percent of revenue	1.60%	1.80%
Geographic Concentration Risk
Consulting Fee Revenue and Total Revenue by Geographic Region:
Percent of revenue	100.00%	100.00%
Geographic Concentration Risk | United States
Consulting Fee Revenue and Total Revenue by Geographic Region:
Percent of revenue	48.70%	45.20%
Geographic Concentration Risk | Latin America
Consulting Fee Revenue and Total Revenue by Geographic Region:
Percent of revenue	2.50%	2.50%
Geographic Concentration Risk | Europe
Consulting Fee Revenue and Total Revenue by Geographic Region:
Percent of revenue	11.50%	9.20%
Geographic Concentration Risk | Middle East
Consulting Fee Revenue and Total Revenue by Geographic Region:
Percent of revenue	28.70%	35.40%
Geographic Concentration Risk | Africa
Consulting Fee Revenue and Total Revenue by Geographic Region:
Percent of revenue	7.00%	5.90%
Geographic Concentration Risk | Asia/Pacific
Consulting Fee Revenue and Total Revenue by Geographic Region:
Percent of revenue	1.60%	1.80%

Segment and Related Informati_4

Segment and Related Information - Operating Profit (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Profit (Loss)
Operating profit (loss)	$ 539	$ (5,240)
Operating segment | United States
Operating Profit (Loss)
Operating profit (loss)	4,033	7,333
Operating segment | Latin America
Operating Profit (Loss)
Operating profit (loss)	(96)	(304)
Operating segment | Europe
Operating Profit (Loss)
Operating profit (loss)	(1,935)	2,158
Operating segment | Middle East
Operating Profit (Loss)
Operating profit (loss)	3,377	(4,226)
Operating segment | Africa
Operating Profit (Loss)
Operating profit (loss)	2,412	669
Operating segment | Asia/Pacific
Operating Profit (Loss)
Operating profit (loss)	(285)	(337)
Corporate
Operating Profit (Loss)
Operating profit (loss)	$ (6,967)	$ (10,533)

Segment and Related Informati_5

Segment and Related Information - Depreciation and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Depreciation and Amortization Expense
Depreciation and amortization expense	$ 791	$ 1,291
Operating segment | Project Management
Depreciation and Amortization Expense
Depreciation and amortization expense	774	1,059
Corporate
Depreciation and Amortization Expense
Depreciation and amortization expense	$ 17	$ 232

Segment and Related Informati_6

Segment and Related Information - Revenue by Client Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consulting Fee Revenue and Total Revenue By Client Type:
Revenues	$ 98,683	$ 113,897
Percent of revenue	100.00%	100.00%
U.S. federal government
Consulting Fee Revenue and Total Revenue By Client Type:
Revenues	$ 4,692	$ 3,872
U.S. state, regional and local governments
Consulting Fee Revenue and Total Revenue By Client Type:
Revenues	30,895	33,551
Foreign governments
Consulting Fee Revenue and Total Revenue By Client Type:
Revenues	25,679	33,806
Private sector
Consulting Fee Revenue and Total Revenue By Client Type:
Revenues	$ 37,417	$ 42,668
Customer Concentration Risk
Consulting Fee Revenue and Total Revenue By Client Type:
Percent of revenue	100.00%	100.00%
Customer Concentration Risk | U.S. federal government
Consulting Fee Revenue and Total Revenue By Client Type:
Percent of revenue	4.80%	3.40%
Customer Concentration Risk | U.S. state, regional and local governments
Consulting Fee Revenue and Total Revenue By Client Type:
Percent of revenue	31.30%	29.50%
Customer Concentration Risk | Foreign governments
Consulting Fee Revenue and Total Revenue By Client Type:
Percent of revenue	26.00%	29.70%
Customer Concentration Risk | Private sector
Consulting Fee Revenue and Total Revenue By Client Type:
Percent of revenue	37.90%	37.40%

Segment and Related Informati_7

Segment and Related Information - Property, Plant and Equipment, Net by Geographic Location (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment, Net by Geographic Location:
Property, plant and equipment, net	$ 10,984	$ 10,787
United States
Property, Plant and Equipment, Net by Geographic Location:
Property, plant and equipment, net	8,700	8,416
Latin America
Property, Plant and Equipment, Net by Geographic Location:
Property, plant and equipment, net	662	692
Europe
Property, Plant and Equipment, Net by Geographic Location:
Property, plant and equipment, net	506	503
Middle East
Property, Plant and Equipment, Net by Geographic Location:
Property, plant and equipment, net	913	962
Africa
Property, Plant and Equipment, Net by Geographic Location:
Property, plant and equipment, net	102	105
Asia/Pacific
Property, Plant and Equipment, Net by Geographic Location:
Property, plant and equipment, net	$ 101	$ 109

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Feb. 08, 2018	Mar. 31, 2019	Mar. 31, 2018
Loss Contingencies [Line Items]
Less: Loss on performance bond		$ 0	$ 7,938
Other liabilities
Loss Contingencies [Line Items]
Potential tax liability related to certain foreign subsidiaries		$ 630
Performance Guarantee
Loss Contingencies [Line Items]
Less: Loss on performance bond	$ 7,938

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term for operating leases	5 years 6 months 4 days
Operating lease expense	$ 1,986	$ 2,239
Short-term lease expense	292
Sublease income	$ 143
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal option	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease renewal option	5 years

Leases - Maturities of Operatin

Leases - Maturities of Operating Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019USD ($)
Operating leases
2019 (excluding the three months ended March 31, 2019)	$ 5,205
2020	6,157
2021	4,564
2022	3,497
2023	2,725
Thereafter	6,933
Total principal and interest payments	29,081
Less: present value discount	5,072
Present value of net minimum lease payments	$ 24,009
Weighted average discount rate	6.87%