Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Use of Estimates The preparation of consolidated financial statements in conformity with United States generally accepted accounting principles (U.S. GAAP), requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Significant estimates and assumptions are used for, but not limited to: (1) the valuation of accounts receivable; (2) goodwill, trade names, and other intangible assets; (3) other long-lived assets; (4) share-based compensation; (5) accruals for health, workers’ compensation, and professional liability claims; (6) valuation of deferred tax assets; (7) purchase price allocation; (8) fair value of interest rate swap agreement; (9) legal contingencies; (10) contingent considerations; (11) income taxes; and (12) sales and other non-income tax liabilities. Accrued insurance claims and reserves include estimated settlements from known claims and actuarial estimates for claims incurred but not reported. Actual results could differ from those estimates. Cash and Cash Equivalents The Company considers all investments with original maturities of three months or less to be cash and cash equivalents. The Company invests its excess cash in highly rated overnight funds and other highly rated liquid accounts. The Company is exposed to credit risk associated with these investments. The Company minimizes its credit risk relating to these positions by monitoring the financial condition of the financial institutions involved and by primarily conducting business with large, well established financial institutions, and diversifying its counterparties. The Company does not currently anticipate nonperformance by any of its significant counterparties. Interest income on cash and cash equivalents of $0.4 million for the year ended December 31, 2018, and $0.1 million for the years ended December 31, 2017 and 2016, is included in other income, net, on the Company’s consolidated statements of operations. Accounts Receivable, Allowance for Doubtful Accounts, and Concentration of Credit Risk Accounts receivable potentially subject the Company to concentrations of credit risk. The Company’s customers are primarily healthcare providers, and accounts receivable represent amounts due from them. The Company generally does not require collateral and mitigates its credit risk by performing credit evaluations and monitoring at-risk accounts. The allowance for doubtful accounts represents the Company’s estimate of uncollectible receivables resulting from the inability of its customers to make required payments, which results in a provision for bad debt expense. The adequacy of this allowance is determined by continually evaluating individual customer receivables, considering the customer's financial condition, credit history, and current economic conditions. The Company writes off specific accounts based on an ongoing review of collectability as well as past experience with the customer. In addition, the Company maintains a sales allowance for customer disputes which may arise in the ordinary course, which is recorded as contra-revenue. Historically, losses on uncollectible accounts and sales allowances have not exceeded our allowances. The Company’s contract terms typically require payment between 15 to 60 days from the date of invoice and are considered past due based on the particular negotiated contract terms. The majority of the Company's business activity is with hospitals located throughout the United States. No single customer accounted for more than 10% of the Company’s accounts receivable balance as of December 31, 2018 and 2017 , or revenue for the years ended December 31, 2018 , 2017 , and 2016 . Prepaid Rent and Deposits The Company leases apartments for eligible field employees under short-term agreements (typically three to six months), which generally coincide with each employee’s staffing contract. Costs relating to these leases are included in direct operating expenses on the accompanying consolidated statements of operations. As a condition of these agreements, the Company may place security deposits on the leased apartments. Deposits on field employees’ apartments related to these short-term agreements are included in other current assets on the accompanying consolidated balance sheets. Property and Equipment Property and equipment are stated at cost, less accumulated depreciation. Depreciation is determined on a straight-line basis over the estimated useful lives of the assets, which generally range from three to seven years. Leasehold improvements are depreciated over the shorter of their estimated useful life or the term of the individual lease. On an annual basis, the Company reviews its property and equipment listings and disposes of assets that are no longer in use. Certain software development costs have been capitalized in accordance with the provisions of the Intangibles-Goodwill and Other/Internal-Use Software Topic of the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC). Such costs include charges for consulting services and costs for Company personnel associated with programming, coding, and testing such software. Amortization of capitalized software costs begins when the software is ready for use and is included in depreciation expense in the accompanying consolidated statements of operations. Software development costs are being amortized using the straight-line method over three to five years. Business Combinations The Company applies accounting in accordance with the Business Combinations Topic of the FASB ASC when it acquires control over a business. Business combinations are accounted for at fair value. The associated acquisition costs are expensed as incurred and recorded as acquisition and integration costs; noncontrolling interests, if any, are reflected at fair value at the acquisition date; restructuring costs associated with a business combination are expensed; contingent consideration is measured at fair value at the acquisition date, with changes in the fair value after the acquisition date affecting earnings; and goodwill is determined as the excess of the fair value of the consideration conveyed in the acquisition over the fair value of the net assets acquired. The accounting for business combinations requires estimates and judgments as to expectations for future cash flows of the acquired business, and the allocation of those cash flows to identifiable intangible assets, in determining the estimated fair value for assets and liabilities acquired. The fair values assigned to tangible and intangible assets acquired and liabilities assumed are based on management's estimates and assumptions, including valuations that utilize customary valuation procedures and techniques. If the actual results differ from the estimates and judgments used in these estimates, the amounts recorded in the financial statements could result in a possible impairment of the intangible assets and goodwill, or require acceleration of the amortization expense of finite-lived intangible assets. The results of the acquired businesses' operations are included in the consolidated statements of operations of the combined entity beginning on the date of acquisition. See Note 4 - Acquisitions. Goodwill, Trade Names, and Other Intangible Assets Goodwill represents the excess of purchase price and related costs over the fair value assigned to the net tangible and identifiable intangible assets of businesses acquired. Other identifiable intangible assets with definite lives are being amortized using the straight-line method over their estimated useful lives which range from 1 to 16 years. Goodwill and certain intangible assets with indefinite lives are not amortized. Instead, in accordance with the Intangibles-Goodwill and Other Topic of the FASB ASC, these assets are reviewed for impairment annually at the beginning of the fourth quarter, and whenever circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. When reviewed, the Company has the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, as a basis for determining whether it is necessary to perform the quantitative testing. If it is determined that a quantitative test is necessary or more efficient than a qualitative approach, the Company generally measures the fair value of its reporting units using a combination of income and market approaches. For the periods prior to the fourth quarter of 2017, the performance of the quantitative impairment test involved a two-step process. The first step required the Company to determine the fair value of each of its reporting units and compare it to the reporting unit’s carrying amount. If the reporting unit's fair value was less than its carrying amount, the Company was required to perform a second step to calculate the implied value of goodwill. The implied value was then compared to its carrying amount to calculate the impairment charge, if any. Beginning in the fourth quarter of 2017, for its annual review on October, 1, 2017, the Company early adopted the provisions of Accounting Standards Update (ASU) 2017-04, Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. Under ASU 2017-04, the second step of the quantitative assessment is eliminated, and, if the reporting unit’s carrying value exceeds its fair value, an impairment charge is recognized for the amount by which the carrying amount exceeds the reporting unit’s fair value not to exceed the total amount of goodwill allocated to that reporting unit. Additionally, income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss is considered, if applicable. The Company determines its reporting units by identifying its operating segments and any component businesses and aggregates the components businesses if they have similar economic characteristics. The Company had the following reporting units that it reviewed for impairment: 1) Nurse and Allied Staffing; 2) Physician Staffing; and 3) Search. Management considers historical experience and all available information at the time the fair values of its reporting units are estimated. However, fair values that could be realized in an actual transaction may have differed from those used to evaluate the potential impairment of goodwill. Long-lived assets and identifiable intangible assets with definite lives are evaluated for impairment in accordance with the Property, Plant, and Equipment Topic of the FASB ASC. In accordance with this Topic, long-lived assets and definite-lived intangible assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount may not be recoverable. Recoverability of long-lived assets is measured by a comparison of the carrying amount of the asset group to the future undiscounted net cash flow that is expected to be generated by those assets. If such assets are considered to be impaired, the impairment charge recognized is the amount by which the carrying amount of the assets exceeds the fair value of the assets. Any related impairment losses are recognized in earnings and included in the caption impairment charges on the consolidated statements of operations. See Note 5 - Goodwill, Trade Names, and Other Intangible Assets. Debt Discount and Debt Issuance Costs Stated discounts on proceeds, and other fees reimbursed to lender, as well as the initial value of any embedded derivative features of the Convertible Notes and Term Loans, as defined in Note 8 - Debt, are treated as a discount associated with the respective debt instrument and presented in the balance sheet as an offset to the carrying amount of the debt. Discounts are amortized to interest expense using the effective interest rate method, or a method that approximates the effective interest rate method, over the expected life of the debt. Deferred costs related to the issuance of the Convertible Notes and the Term Loans were capitalized and are presented in the balance sheet as a direct deduction from the carrying amount of the debt liability. Deferred costs are amortized using the effective interest method. Deferred costs related to the Convertible Notes were written off in connection with the repayment of such Convertible Notes. See Note 8 - Debt. Deferred costs related to the issuance of the Company’s Revolving Credit Facilities, as defined in Note 8 - Debt, have been capitalized and included in other assets on the consolidated balance sheets, and amortized using the straight line method over the term of the related credit agreement. Derivative Financial Instruments The Company is exposed to interest rate risk due to its outstanding senior secured term loan entered into on August 1, 2017 with a variable interest rate. As a result, the Company has entered into an interest rate swap agreement to effectively convert a portion of its variable interest payments to a fixed rate. The principal objective of the interest rate swap is to eliminate or reduce the variability of the cash flows in those interest payments associated with the Company’s long-term debt, thus reducing the impact of interest rate changes on future interest payment cash flows. The Company has determined that the interest rate swap qualifies as a cash flow hedge in accordance with ASC 815, Derivatives and Hedging . As the critical terms of the hedging instrument and the hedged forecasted transaction are the same, the Company has concluded that changes in the cash flows attributable to the risk being hedged are expected to completely offset at inception and on an ongoing basis. Changes in the fair value of an interest rate swap agreement designated as a cash flow hedge are recorded as a component of accumulated other comprehensive income (loss), net of deferred taxes, within stockholders’ equity and are amortized to interest expense over the term of the related debt as the interest payments are made. Interest rate swap payments are included in net cash provided by operating activities on the Company’s consolidated statement of cash flows. In conjunction with entering into the interest rate swap agreement, the Company early adopted ASU 2017-12, Derivative and Hedging (Topic 815) to simplify the application of hedge accounting. See Note 9 - Derivatives. The Company evaluates embedded conversion features within its convertible debt in accordance with the Derivatives and Hedging Topic of the FASB ASC to determine whether the embedded conversion feature should be bifurcated from the host instrument and accounted for as a derivative at fair value. Changes in the fair value of these derivatives during each reporting period were reported in other expenses (income) on the consolidated statements of operations. The fair value at inception had been recorded as debt discount and was being amortized to interest expense over the term of the note using the effective interest method. On March 17, 2017, the Company paid in full its Convertible Notes and, as a result, derecognized the derivative liability. See Note 8 - Debt. Sales and Other State Non-income Tax Liabilities The Company accrues sales and other state non-income tax liabilities based on the Company’s best estimate of its probable liability utilizing currently available information and interpretation of relevant tax regulations. Given the nature of the Company’s business, significant subjectivity exists as to both whether sales and other state non-income taxes can be assessed on its activity and how the sales tax will ultimately be measured by the relevant jurisdictions. The Company makes a determination for each reporting period whether the estimates for sales and other non-income taxes in certain states should be revised. Insurance Claims The Company provides workers’ compensation insurance coverage, professional liability coverage, and healthcare benefits for eligible employees. The Company records its estimate of the ultimate cost of, and reserves for, workers' compensation and professional liability benefits based on actuarial models prepared or reviewed by an independent actuary using the Company’s loss history as well as industry statistics. The healthcare insurance accrual is for estimated claims that have occurred but have not been reported and is based on the Company’s historical claim submission patterns. Furthermore, in determining its reserves, the Company includes reserves for estimated claims incurred but not reported as well as unfavorable claims development. The Other Expenses/Insurance Costs Topic of the FASB ASC previously issued authoritative accounting guidance in the area of insurance contracts and related activity thereto. This topic concluded that, under circumstances such as in the Company’s insured professional liability and workers' compensation policies, since a right of legal offset does not exist due to the fact that there are three parties to an incurred claim, the insured, the insurer, and the claimant, the related liability to the claimant should be classified separately on a gross basis with a separate related receivable from the insurer recognized as being due from insurance carriers. Accordingly, the Company’s consolidated balance sheets as of December 31, 2018 and 2017 reflect the related short-term liabilities in accrued compensation and benefits and the related long-term liabilities as long-term accrued claims, and the short-term receivable portion as insurance recovery receivable and the long-term portion as non-current insurance recovery receivable. See Note 7 - Balance Sheet Details. The ultimate cost of workers’ compensation, professional liability, and health insurance claims will depend on actual amounts incurred to settle those claims and may differ from the amounts reserved by the Company for those claims. Workers’ compensation benefits are provided under a partially self-insured plan. The Company has letters of credit to guarantee payments of claims. At December 31, 2018 and 2017 , the Company had outstanding approximately $18.8 million and $19.6 million , respectively, of standby letters of credit as collateral to secure the self-insured portion of this plan. The Company has occurrence-based primary professional liability policies that provide the Company and each working professional in its nurse and allied healthcare business with coverage. Effective January 1, 2016, the Company has a claims-made professional liability policy for its physicians and advanced practitioners, with a $0.5 million self-insured retention per claim. Prior to January 1, 2016, the Company had an occurrence-based professional liability policy for its independent contractor physicians and advanced practitioners which was insured by a wholly-owned subsidiary, Jamestown Indemnity, Ltd., a wholly-owned Cayman Island captive company (the Captive), until its voluntary liquidation in the third quarter of 2015. Beginning in March 2015, the Company's Physician subsidiary self-insured $0.5 million for each of its professional liability claims. Under the terms of the Captive’s reinsurance policy there was a requirement to guarantee the payment of claims to its insured party’s primary medical malpractice insurance carrier via a letter of credit. As a result of the Captive's liquidation, the letter of credit was reduced. As of December 31, 2018 and 2017 , the value of the letter of credit was $1.8 million and $2.0 million, respectively. Subject to certain limitations, the Company also has umbrella liability coverage for its working nurses and allied healthcare professionals. While this umbrella coverage does not extend to professional liability claims against its independent contractor physicians and advanced practitioners, it does cover claims brought against all of the Company’s subsidiaries for non-patient general liability. Revenue Recognition In the first quarter of 2018, the Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) . ASU 2014-09 introduces a new five-step revenue recognition model in which an entity recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new standard also requires additional disclosures about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts. See Note 3 - Revenue Recognition for additional accounting policy and related disclosures. The Company elected to adopt the standard using a modified retrospective method, which only impacts contracts not completed as of December 31, 2017. Revenue from the Company’s services is recognized when control of the promised services are transferred to the Company’s customers, in an amount that reflects the consideration it expects to receive in exchange for the service. The Company has concluded that transfer of control of its staffing services, which represents the majority of its revenues, occurs over time as the services are provided, which is consistent with revenue recognition under the prior guidance. The following is a description of the nature, amount, timing, and uncertainty of revenue and cash flows from which the Company generates revenue. Temporary Staffing Revenue Revenue from temporary staffing is recognized as control of the services is transferred over time, and is based on hours worked by the Company’s field staff. The Company recognizes the majority of its revenue at the contractual amount the Company has the right to invoice for services completed to date. Generally, billing to customers occurs weekly, bi-weekly, or monthly and is aligned with the payment of services to the temporary staff, with payment terms of 15 to 60 days. Accounts receivable includes estimated revenue for employees’ and independent contractors’ time worked but not yet invoiced. At December 31, 2018 and December 31, 2017, the Company's estimate of amounts that had been worked but had not been billed totaled $44.1 million and $41.8 million , respectively, and are included in accounts receivable on the consolidated balance sheets. Other Service Revenue The Company offers other optional services to its customers that are transferred over time including: managed service programs (MSP) providing agency services (as further described below in Gross versus Net Policies), recruitment process outsourcing (RPO), other outsourcing services, and retained search services, which is less than 5% of its consolidated revenue for the years ended December 31, 2018, 2017, and 2016. Generally, billing and payment terms for MSP agency services is consistent with temporary staffing as the customers are similar or the same. Revenue from these services are recognized based on the contractual amount for services completed to date which best depicts the transfer of control of services. For the Company’s RPO, other outsourcing, and retained search services, revenue is generally recognized in the amount to which the entity has a right to invoice which corresponds directly with the value to the customer. The Company does not, in the ordinary course of business, offer warranties or refunds. Gross Versus Net Policies The Company records revenue on a gross basis as a principal or on a net basis as an agent depending on the contracted arrangement, as follows: Managed Service Programs The Company has certain contracts with healthcare facilities to provide comprehensive services through its MSPs. Under these contractual arrangements, the customer’s orders are filled with either one of the Company's healthcare professionals or a third party's healthcare professionals (subcontractors). When its healthcare professional is staffed, the Company determined that it acts as a principal in the arrangement, as it is considered the employer of record. Accordingly, revenue is reported on a gross basis on the consolidated statements of operations. Alternatively, the Company determined that it acts as an agent in the arrangement when a subcontracted healthcare professional is staffed, as the Company does not control the services before they are transferred to the customer. Accordingly, revenue is reported on a net basis on the consolidated statements of operations. The customer is invoiced for the hours worked by the subcontracted healthcare professional multiplied by the hourly bill rate. A subcontractor liability, which is recognized as a reduction of revenue, is established in accrued expenses for the invoiced amount, net of an administrative fee, and is generally payable after the Company has received payment from its customer. The Company’s administrative fee is calculated as a percentage of the customer’s invoice and is recognized over time as the services are rendered by the subcontracted healthcare professional. The Company does not collect or recognize an upfront placement fee. Physician Staffing The Physician Staffing business has contracts with its healthcare customers to provide temporary staffing services. The Company uses independent contractors for these services. The Company determined that it acts as a principal in these arrangements and, therefore, revenue is reported on a gross basis on the consolidated statements of operations. See Note 3 - Revenue Recognition for the Company's revenues disaggregated by revenue source. Sales and usage-based taxes are excluded from revenue. Contract Costs All contract fulfillment costs are expensed as incurred to direct operating expenses. With respect to FASB ASC 606, Revenue from Contracts with Customers , there were no contract assets or material contract liabilities as of December 31, 2018 and 2017. Practical Expedients and Exemptions For the Company’s contracts that have an original duration of one year or less, the Company uses the practical expedients and has elected to recognize any incremental costs of obtaining these contracts as expensed when incurred. Further, the Company does not disclose the value of unsatisfied performance obligations for: (i) contracts with an original expected length of one year or less, and (ii) contracts for which it recognizes revenue at the amount to which it has the right to invoice for services performed. Share-Based Compensation The Company has, from time to time, granted stock options, stock appreciation rights, performance-based stock awards, and restricted stock for a fixed number of common shares to employees. In accordance with the Compensation-Stock-Compensation Topic of the FASB ASC, companies may choose from alternative valuation models. The Company used the Black-Scholes method of valuing its options and stock appreciation rights. The Company has elected to recognize compensation expense on a straight-line basis over the requisite service period of the entire award. The Company values its restricted stock awards and the fair value of its performance-based stock awards by reference to its stock price on the date of grant. The Company granted performance-based stock awards to certain key personnel pursuant to its 2014 Omnibus Incentive Plan, amended and restated on May 23, 2017 (2017 Plan) as described in Note 14 - Stockholders' Equity. Pursuant to the plan, the number of target shares that vest are determined based on the level of attainment of the targets. If a minimum level of performance is attained for the awards, restricted stock is issued based on the level of attainment. The Company recognizes performance-based restricted stock as compensation expense based on the most likely probability of attaining the prescribed performance and over the requisite service period beginning at its grant date and through the date the restricted stock vests. Compensation expense related to share-based payments is included in selling, general and administrative expenses in the consolidated statements of operations, and totaled $3.6 million , $4.1 million, and $3.4 million, during the years ended December 31, 2018 , 2017 , and 2016 , respectively. See Note 14 - Stockholders’ Equity. Advertising The Company’s advertising expense consists primarily of online advertising, internet direct marketing, print media, and promotional material. Advertising costs are expensed as incurred and totaled $6.7 million , $7.6 million , and $10.2 million, for the years ended December 31, 2018 , 2017 , and 2016 , respectively. Restructuring Costs The Company considers restructuring activities to be programs whereby it fundamentally changes its operations, such as closing and consolidating facilities, reducing headcount, and realigning operations in response to changing market conditions. As a result, restructuring costs on the consolidated statements of operations include on-going benefit costs for its employees, exit costs, and other costs including write-offs related to abandoned locations. Reconciliations of the beginning and ending total restructuring liability balances are presented below: Year Ended December 31, 2018 2017 2016 (amounts in thousands) On-Going Benefit Costs Exit Costs On-Going Benefit Costs Exit Costs On-Going Benefit Costs Exit Costs Balance at beginning of period $ 87 $ 441 $ 325 $ 273 $ 44 $ 338 Charged to restructuring costs (a) 1,600 184 522 504 563 190 Payments (1,131 ) (235 ) (760 ) (336 ) (282 ) (255 ) Balance at end of period $ 556 $ 390 $ 87 $ 441 $ 325 $ 273 ________________ (a) The restructuring costs on the consolidated statements of operations include direct write-offs of $0.4 million related to abandoned locations, as well as other costs of $0.5 million . Deferred Rent Deferred rent consists of free rent, rent escalation, tenant improvement allowances, and other incentives received from landlords related to the operating leases for our facilities. Rent escalation represents the difference between actual operating lease payments due and straight-line rent expense, which we record over the term of the lease. The excess is recorded as a deferred credit in the early periods of the lease, when cash payments are generally lower than straight-line rent expense, and is reduced in the later periods of the lease when payments begin to exceed the straight-line expense. Tenant allowances from landlords for tenant improvements are generally comprised of cash received from the landlord or paid on our behalf as part of the negotiated terms of the lease. These tenant improvement allowances and other leasehold incentives are recorded when realizable as deferred rent and are amortized as a reduction of periodic rent expense, over the term of the applicable lease. See Note 12 - Commitments and Contingencies. Income Taxes The Company accounts for income taxes under the Income Taxes Topic of the FASB ASC. Deferred income tax assets and liabilities are determined based upon differences between the financial reporting and tax basis of assets and liabilities, and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company recognizes in its financial statements the impact of a tax position if that position is more likely than not of being sustained on audit, based on the technical merits of the position. The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes. The Company maintains valuation allowances when it is more likely than not that all or a portion of a deferred tax asset will not be realized. In determining whether a valuation allowance is warranted, the Company evaluates factors such as prior earnings history, expected future earnings, carryback and carryforward periods, and tax strategies. The Company considers all positive and negative evidence to estimate if sufficient future taxable income will be generated to realize the deferred tax asset. It considers cumulative losses in recent years as well as the impact of one-time events in assessing its pre-tax earnings. Assumptions regarding future taxable income require significant judgment. The Company's assumptions are consistent with estimates and plans used to manage its business, which includes restructuring and other initiatives. In the event that actual results differ from these estimates, or the Company adjusts these estimates in future periods for current trends or changes in its estimating assumptions, it may modify the level of the valua |