Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Accompanying Unaudited Condensed Consolidated Financial Statements	The accompanying unaudited condensed consolidated financial statements of Marchex, Inc. and its wholly-owned subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for annual financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019, or for any other period. The balance sheet at December 31, 2018 has been derived from the audited consolidated financial statements at that date, but does not include all of the information and notes required by accounting principles generally accepted in the United States of America for complete financial statements. These condensed consolidated financial statements and notes should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Annual Report on Form 10-K for the year ended December 31, 2018, as amended, and filed with the SEC. The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All inter-company transactions and balances have been eliminated in consolidation. Certain reclassifications have been made to the consolidated financial statements in the prior periods to conform to the current period presentation. Acquisitions In November 2018, we acquired Telmetrics Inc. (“Telmetrics”), an enterprise call and text tracking and analytics company, and SITA Laboratories, Inc. (d/b/a Callcap) (“Callcap”), a call monitoring and analytics solutions company. See Note 10. Acquisitions of the notes to the condensed consolidated financial statements for further discussion.
Recent Accounting Pronouncement(s) Not Yet Effective	Recent Accounting Pronouncement(s) Not Yet Effective In August 2018, the FASB issued Accounting Standards Update 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 (ASU 2018-15), an ASU which requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC 350-40 to determine which implementation costs to be capitalized. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted. The Company does not expect adoption of ASU 2018-15 to have a material impact on its consolidated financial statements. In August 2018, the FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820) - Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13), an ASU which modifies the disclosure requirements on fair value measurements in ASC 820. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted. The Company does not expect adoption of ASU 2018-13 to have a material impact on its consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (ASU 2017-04). ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating “Step 2” from the goodwill impairment test. ASU 2017-04 is effective for public companies’ annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect adoption of ASU 2017-04 to have a material impact on its consolidated financial statements. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Financial Instruments — Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (ASU 2016-13), an ASU amending the impairment model for most financial assets and certain other instruments. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted after December 15, 2018. The ASU must be adopted using a modified-retrospective approach. In November 2018, the FASB issued Accounting Standards Update No. 2018-19, Codification Improvements (Topic 326), Financial Instruments - Credit Losses (ASU 2018-19), an ASU intended to improve the Codification or correct its unintended application. The ASU is effective upon the adoption of the amendments in Accounting Standards Update No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which is effective for reporting periods beginning after December 15, 2019, with early adoption permitted after December 15, 2018. The Company does not expect adoption of ASU 2018-19 and ASU 2016-13 to have a material impact on its consolidated financial statements.
Revenue Recognition	Revenue Recognition The Company generates the majority of its revenues from advertisers for its performance based advertising services, which include the use of its call analytics technology and pay-for-call advertising products and services. The Company’s revenue also consists of payments from its reseller partners for use of its local leads platform and marketing services, which they offer to their small business customers. Customers typically receive the benefit of the Company’s services as they are performed and substantially all the Company’s revenue is recognized over time as the services are performed. The Company adopted FASB ASC Topic 606, Revenue from Contracts with Customers, (ASC 606) on January 1, 2018 using the modified retrospective approach for all contracts not completed as of the date of initial application, referred to as open contracts. Therefore, the comparative information has not been adjusted and continues to be reported under ASC 605. Under ASC 606, revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects the consideration we expect to receive in exchange for those goods or services. The Company measures revenue based on the consideration specified in the customer arrangement, and revenue is recognized when the performance obligations in the customer arrangement are satisfied. A performance obligation is a promise in a contract to transfer a distinct service or product to the customer. The transaction price of a contract is allocated to each distinct performance obligation and recognized as revenue when or as, the customer receives the benefit of the performance obligation. The primary impact upon adoption of the standard relates to the deferral (i.e. capitalization) of incremental contract acquisition costs which are recorded as other non-current assets in the balance sheet and the recognition (i.e. amortization) of them in sales and marketing expenses in the statements of operations over the term of the initial contract and anticipated renewal contracts to which the costs relate. The Company recognized a $189,000 decrease to accumulated deficit as of January 1, 2018 for the cumulative impact of adoption of the amended guidance associated with the incremental contract acquisition costs on open contracts that were capitalized. The impact of the adoption of ASC 606 on net loss applicable to common stockholders for the year ended December 31, 2018 and on the unaudited consolidated balance sheet at December 31, 2018 was not significant. The Company’s call analytics technology platform provides data and insights that can measure the performance of mobile, online and offline advertising for advertisers and small business resellers. The Company generates revenue from the Company’s call analytics technology platform when advertisers pay the Company a fee for each call/text or call/text related data element they receive from calls or texts including call-based ads the Company distributes through its sources of call distribution or for each phone number tracked based on a pre-negotiated rate. Revenue is recognized as services are provided over time, which is generally measured by the delivery of each call/text or call/text related data element or each phone number tracked. The Company’s call marketplace offers advertisers and adverting service providers’ ad placements across the Company’s distribution network. Advertisers or advertising service providers are charged on a pay-per-call or cost-per-action basis. The Company generates revenue upon delivery of qualified and reported phone calls to advertisers or advertising service providers’ listings. These advertisers and advertising service providers pay the Company a designated transaction fee for each qualified phone call, which occurs when a user makes a phone call, clicks, or completes a specified action on any of their advertisement listings after it has been placed by the Company or by the Company’s distribution partners. The Company also generates revenue from cost-per-action services, which occurs when a user makes a phone call from the Company’s advertiser’s listing or is redirected from one of the Company’s web sites or a third-party web site in the Company’s distribution network to an advertiser web site and completes the specified action. Each qualified phone call or specified action on a listing represents a completed transaction. Revenue is recognized as services are provided upon the delivery of a qualified phone call or completed action. The Company’s distribution network is primarily comprised of third party mobile and online search engines and applications, mobile carriers, directories, destination sites, shopping engines, Internet domains or web sites, other targeted Web-based content, and offline sources. The Company enters into agreements with these third-party distribution partners to provide distribution for pay-for-call advertisement listings, which contain call tracking numbers and/or URL strings. The Company generally pays distribution partners based on a percentage of revenue or a fixed amount per phone call or other actions on these listings. The Company acts as the principal with the advertiser for revenue call transactions and is responsible for the fulfillment of services. The Company recognizes revenue for these fees under the gross revenue recognition method. The Company’s local leads platform allows reseller partners to sell call advertising, search marketing, and other lead generation products through their existing sales channels to small business advertisers. The Company generates revenue from reseller partners utilizing the Company’s local leads platform and is paid account fees and/or agency fees for the Company’s products in the form of a percentage of the cost of every call or click delivered to advertisers. Revenue is recognized over time as services are provided. The reseller partners engage the advertisers and are the principal for the transaction, and the Company, in certain instances, is only financially liable to the publishers in the Company’s capacity as a collection agency for the amount collected from the advertisers. The Company recognizes revenue for these fees under the net revenue recognition method. In limited arrangements resellers pay the Company a fee for fulfilling an advertiser’s campaign in its distribution network and the Company acts as the principal and recognizes revenue for these fees under the gross revenue recognition method. For the three months ended March 31, 2018, revenues disaggregated by service type were $19.9 million for performance based advertising services and $2.0 million for local leads services. For the three months ended March 31, 2019, revenues disaggregated by service type were $25.2 million for performance based advertising services and $1.2 million for local leads services. The majority of the Company’s customers are invoiced on a monthly basis following the month of the delivery of services and are required to make payments under standard credit terms. The Company establishes an allowance for advertiser credits, which is included in accrued expense and other current liabilities in the balance sheet as of March 31, 2019, using its best estimate of the amount of expected future reductions in advertisers’ payment obligations related to delivered services based on analysis of historical credits. Customer payments received in advance of revenue recognition are contract liabilities and are recorded as deferred revenue. During the three months ended March 31, 2019, revenue recognized that was included in the contract liabilities balance at the beginning of the period was $349,000. The majority of the Company’s total revenue is derived from contracts that include consideration that is variable in nature. The variable elements of these contracts primarily include the number of transactions (for example, the number qualified phone calls). For contracts with an effective term greater than one year, the Company applies the standard’s practical expedient that permits the exclusion of disclosure of the value of unsatisfied performance obligations for these contracts as the Company’s right to consideration corresponds directly to the value provided to the customer for services completed to date and all future variable consideration is allocated to wholly unsatisfied performance obligations. A term for purposes of these contracts has been estimated at 24 months. In addition, the Company applies the standard’s optional exemption to disclose information about performance obligations for contracts that have original expected terms of one year or less. For arrangements that include multiple performance obligations, the transaction price from the arrangement is allocated to each respective performance obligation based on its relative standalone selling price and recognized when revenue recognition criteria for each performance obligation are met. The standalone selling price for each performance obligation is established based on the sales price at which the Company would sell a promised good or service separately to a customer or the estimated standalone selling price. In certain cases, the Company records revenue based on available and reported preliminary information from third parties. Collection on the related receivables may vary from reported information based upon third-party refinement of the estimated and reported amounts owed that occurs subsequent to period ends. The Company’s incremental direct costs of obtaining a contract, which consist primarily of sales commissions, are generally deferred and amortized to sales and marketing expense over the estimated life of the relevant customer relationship of approximately 24 months and are subject to being monitored every period to reflect any significant change in assumptions. In addition, the deferred contract cost asset is assessed for impairment on a periodic basis. The Company’s contract acquisition costs are included in other assets, net in the balance sheet. The Company is applying the standard’s practical expedient permitting expensing of costs to obtain a contract when the expected amortization period is one year or less, which typically results in expensing commissions paid to acquire certain contracts. As of March 31, 2019, the Company had $247,000 of net deferred contract costs and the amortization associated with these costs was $108,000 for the three months ended March 31, 2019.
Stock-Based Compensation	The Company grants stock-based awards, including stock options, restricted stock awards, and restricted stock units. The Company measures stock-based compensation cost at the grant date based on the fair value of the award and recognizes it as expense over the vesting or service period, as applicable, of the stock-based award using the straight-line method. The Company accounts for forfeitures as they occur. The Company uses the Black-Scholes option pricing model to estimate the per share fair value of stock option grants with time-based vesting. The Black-Scholes model relies on a number of key assumptions to calculate estimated fair values. For the three months ended March 31, 2018 and 2019, the expected life of each award granted was determined based on historical experience with similar awards, giving consideration to contractual terms, anticipated exercise patterns, vesting schedules and expirations. Expected volatility is based on historical volatility levels of the Company’s Class B common stock and the expected volatility of companies in similar industries that have similar vesting and contractual terms. The risk-free interest rate is based on the implied yield currently available on U.S. Treasury issues with terms approximately equal to the expected life of the option. For the three months ended March 31, 2018, the Company used an expected dividend yield for those grants prior to the record date of the Company’s common stock cash dividend payment in March 2018.

Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Accompanying Unaudited Condensed Consolidated Financial Statements

The accompanying unaudited condensed consolidated financial statements of Marchex, Inc. and its wholly-owned subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for annual financial statements. In the opinion of management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019, or for any other period. The balance sheet at December 31, 2018 has been derived from the audited consolidated financial statements at that date, but does not include all of the information and notes required by accounting principles generally accepted in the United States of America for complete financial statements. These condensed consolidated financial statements and notes should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Annual Report on Form 10-K for the year ended December 31, 2018, as amended, and filed with the SEC.

The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All inter-company transactions and balances have been eliminated in consolidation. Certain reclassifications have been made to the consolidated financial statements in the prior periods to conform to the current period presentation.

Acquisitions

In November 2018, we acquired Telmetrics Inc. (“Telmetrics”), an enterprise call and text tracking and analytics company, and SITA Laboratories, Inc. (d/b/a Callcap) (“Callcap”), a call monitoring and analytics solutions company. See Note 10. Acquisitions of the notes to the condensed consolidated financial statements for further discussion.

Recent Accounting Pronouncement(s) Not Yet Effective

In August 2018, the FASB issued Accounting Standards Update 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 (ASU 2018-15), an ASU which requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in ASC 350-40 to determine which implementation costs to be capitalized. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted. The Company does not expect adoption of ASU 2018-15 to have a material impact on its consolidated financial statements.

In August 2018, the FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820) - Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13), an ASU which modifies the disclosure requirements on fair value measurements in ASC 820. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted. The Company does not expect adoption of ASU 2018-13 to have a material impact on its consolidated financial statements.

In January 2017, the FASB issued Accounting Standards Update No 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (ASU 2017-04). ASU 2017-04 simplifies the subsequent measurement of goodwill by eliminating “Step 2” from the goodwill impairment test. ASU 2017-04 is effective for public companies’ annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect adoption of ASU 2017-04 to have a material impact on its consolidated financial statements.

In June 2016, the FASB issued Accounting Standards Update No. 2016-13, Financial Instruments — Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (ASU 2016-13), an ASU amending the impairment model for most financial assets and certain other instruments. The ASU is effective for reporting periods beginning after December 15, 2019, with early adoption permitted after December 15, 2018. The ASU must be adopted using a modified-retrospective approach. In November 2018, the FASB issued Accounting Standards Update No. 2018-19, Codification Improvements (Topic 326), Financial Instruments - Credit Losses (ASU 2018-19), an ASU intended to improve the Codification or correct its unintended application. The ASU is effective upon the adoption of the amendments in Accounting Standards Update No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which is effective for reporting periods beginning after December 15, 2019, with early adoption permitted after December 15, 2018. The Company does not expect adoption of ASU 2018-19 and ASU 2016-13 to have a material impact on its consolidated financial statements.

Revenue Recognition

The Company generates the majority of its revenues from advertisers for its performance based advertising services, which include the use of its call analytics technology and pay-for-call advertising products and services. The Company’s revenue also consists of payments from its reseller partners for use of its local leads platform and marketing services, which they offer to their small business customers. Customers typically receive the benefit of the Company’s services as they are performed and substantially all the Company’s revenue is recognized over time as the services are performed.

The Company adopted FASB ASC Topic 606, Revenue from Contracts with Customers, (ASC 606) on January 1, 2018 using the modified retrospective approach for all contracts not completed as of the date of initial application, referred to as open contracts. Therefore, the comparative information has not been adjusted and continues to be reported under ASC 605. Under ASC 606, revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects the consideration we expect to receive in exchange for those goods or services. The Company measures revenue based on the consideration specified in the customer arrangement, and revenue is recognized when the performance obligations in the customer arrangement are satisfied. A performance obligation is a promise in a contract to transfer a distinct service or product to the customer. The transaction price of a contract is allocated to each distinct performance obligation and recognized as revenue when or as, the customer receives the benefit of the performance obligation.

The primary impact upon adoption of the standard relates to the deferral (i.e. capitalization) of incremental contract acquisition costs which are recorded as other non-current assets in the balance sheet and the recognition (i.e. amortization) of them in sales and marketing expenses in the statements of operations over the term of the initial contract and anticipated renewal contracts to which the costs relate. The Company recognized a $189,000 decrease to accumulated deficit as of January 1, 2018 for the cumulative impact of adoption of the amended guidance associated with the incremental contract acquisition costs on open contracts that were capitalized. The impact of the adoption of ASC 606 on net loss applicable to common stockholders for the year ended December 31, 2018 and on the unaudited consolidated balance sheet at December 31, 2018 was not significant.

The Company’s call analytics technology platform provides data and insights that can measure the performance of mobile, online and offline advertising for advertisers and small business resellers. The Company generates revenue from the Company’s call analytics technology platform when advertisers pay the Company a fee for each call/text or call/text related data element they receive from calls or texts including call-based ads the Company distributes through its sources of call distribution or for each phone number tracked based on a pre-negotiated rate. Revenue is recognized as services are provided over time, which is generally measured by the delivery of each call/text or call/text related data element or each phone number tracked.

The Company’s call marketplace offers advertisers and adverting service providers’ ad placements across the Company’s distribution network. Advertisers or advertising service providers are charged on a pay-per-call or cost-per-action basis. The Company generates revenue upon delivery of qualified and reported phone calls to advertisers or advertising service providers’ listings. These advertisers and advertising service providers pay the Company a designated transaction fee for each qualified phone call, which occurs when a user makes a phone call, clicks, or completes a specified action on any of their advertisement listings after it has been placed by the Company or by the Company’s distribution partners. The Company also generates revenue from cost-per-action services, which occurs when a user makes a phone call from the Company’s advertiser’s listing or is redirected from one of the Company’s web sites or a third-party web site in the Company’s distribution network to an advertiser web site and completes the specified action. Each qualified phone call or specified action on a listing represents a completed transaction. Revenue is recognized as services are provided upon the delivery of a qualified phone call or completed action. The Company’s distribution network is primarily comprised of third party mobile and online search engines and applications, mobile carriers, directories, destination sites, shopping engines, Internet domains or web sites, other targeted Web-based content, and offline sources. The Company enters into agreements with these third-party distribution partners to provide distribution for pay-for-call advertisement listings, which contain call tracking numbers and/or URL strings. The Company generally pays distribution partners based on a percentage of revenue or a fixed amount per phone call or other actions on these listings. The Company acts as the principal with the advertiser for revenue call transactions and is responsible for the fulfillment of services. The Company recognizes revenue for these fees under the gross revenue recognition method.

The Company’s local leads platform allows reseller partners to sell call advertising, search marketing, and other lead generation products through their existing sales channels to small business advertisers. The Company generates revenue from reseller partners utilizing the Company’s local leads platform and is paid account fees and/or agency fees for the Company’s products in the form of a percentage of the cost of every call or click delivered to advertisers. Revenue is recognized over time as services are provided. The reseller partners engage the advertisers and are the principal for the transaction, and the Company, in certain instances, is only financially liable to the publishers in the Company’s capacity as a collection agency for the amount collected from the advertisers. The Company recognizes revenue for these fees under the net revenue recognition method. In limited arrangements resellers pay the Company a fee for fulfilling an advertiser’s campaign in its distribution network and the Company acts as the principal and recognizes revenue for these fees under the gross revenue recognition method.

For the three months ended March 31, 2018, revenues disaggregated by service type were $19.9 million for performance based advertising services and $2.0 million for local leads services. For the three months ended March 31, 2019, revenues disaggregated by service type were $25.2 million for performance based advertising services and $1.2 million for local leads services.

The majority of the Company’s customers are invoiced on a monthly basis following the month of the delivery of services and are required to make payments under standard credit terms. The Company establishes an allowance for advertiser credits, which is included in accrued expense and other current liabilities in the balance sheet as of March 31, 2019, using its best estimate of the amount of expected future reductions in advertisers’ payment obligations related to delivered services based on analysis of historical credits. Customer payments received in advance of revenue recognition are contract liabilities and are recorded as deferred revenue. During the three months ended March 31, 2019, revenue recognized that was included in the contract liabilities balance at the beginning of the period was $349,000.

The majority of the Company’s total revenue is derived from contracts that include consideration that is variable in nature. The variable elements of these contracts primarily include the number of transactions (for example, the number qualified phone calls). For contracts with an effective term greater than one year, the Company applies the standard’s practical expedient that permits the exclusion of disclosure of the value of unsatisfied performance obligations for these contracts as the Company’s right to consideration corresponds directly to the value provided to the customer for services completed to date and all future variable consideration is allocated to wholly unsatisfied performance obligations. A term for purposes of these contracts has been estimated at 24 months. In addition, the Company applies the standard’s optional exemption to disclose information about performance obligations for contracts that have original expected terms of one year or less.

For arrangements that include multiple performance obligations, the transaction price from the arrangement is allocated to each respective performance obligation based on its relative standalone selling price and recognized when revenue recognition criteria for each performance obligation are met. The standalone selling price for each performance obligation is established based on the sales price at which the Company would sell a promised good or service separately to a customer or the estimated standalone selling price.

In certain cases, the Company records revenue based on available and reported preliminary information from third parties. Collection on the related receivables may vary from reported information based upon third-party refinement of the estimated and reported amounts owed that occurs subsequent to period ends.

The Company’s incremental direct costs of obtaining a contract, which consist primarily of sales commissions, are generally deferred and amortized to sales and marketing expense over the estimated life of the relevant customer relationship of approximately 24 months and are subject to being monitored every period to reflect any significant change in assumptions. In addition, the deferred contract cost asset is assessed for impairment on a periodic basis. The Company’s contract acquisition costs are included in other assets, net in the balance sheet. The Company is applying the standard’s practical expedient permitting expensing of costs to obtain a contract when the expected amortization period is one year or less, which typically results in expensing commissions paid to acquire certain contracts. As of March 31, 2019, the Company had $247,000 of net deferred contract costs and the amortization associated with these costs was $108,000 for the three months ended March 31, 2019.

Stock-Based Compensation

The Company grants stock-based awards, including stock options, restricted stock awards, and restricted stock units. The Company measures stock-based compensation cost at the grant date based on the fair value of the award and recognizes it as expense over the vesting or service period, as applicable, of the stock-based award using the straight-line method. The Company accounts for forfeitures as they occur.

The Company uses the Black-Scholes option pricing model to estimate the per share fair value of stock option grants with time-based vesting. The Black-Scholes model relies on a number of key assumptions to calculate estimated fair values. For the three months ended March 31, 2018 and 2019, the expected life of each award granted was determined based on historical experience with similar awards, giving consideration to contractual terms, anticipated exercise patterns, vesting schedules and expirations. Expected volatility is based on historical volatility levels of the Company’s Class B common stock and the expected volatility of companies in similar industries that have similar vesting and contractual terms. The risk-free interest rate is based on the implied yield currently available on U.S. Treasury issues with terms approximately equal to the expected life of the option. For the three months ended March 31, 2018, the Company used an expected dividend yield for those grants prior to the record date of the Company’s common stock cash dividend payment in March 2018.