Summary of Significant Accounting Policies (Policies)	6 Months Ended
Summary of Significant Accounting Policies (Policies)	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Recent Accounting Pronouncements Not Yet Adopted and Recently Adopted Accounting Pronouncements	Recent Accounting Pronouncements Not Yet Adopted In August 2018, the Financial Accounting Standards Board ("FASB") issued ASU No. 2018-15, "Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract." The new guidance required 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 capitalize as assets or expense as incurred. The guidance is effective for calendar-year public business entities in 2020. For all other calendar-year entities, it is effective for annual periods beginning in 2021 and interim periods in 2022. Early adoption is permitted. The Company is currently in the process of evaluating the impact of the adoption on its financial position, results of operations and cash flows. (c) Recently Adopted Accounting Pronouncements In February 2016, the FASB issued an ASU 2016-02, "Leases," codified in Accounting Standard Codification 842 ("ASC 842"), which requires that lease arrangements longer than 12 months result in an entity recognizing an asset and liability on its balance sheet. The Company adopted ASC 842 on January 1, 2019, using the alternative modified transition method with no restatement of prior periods or cumulative adjustment to retained earnings. Upon adoption, the Company elected the package of transition practical expedients: (i) not to reassess prior conclusions related to whether any expired or existing contracts are or contain leases; (ii) not to reassess the lease classification for any expired or existing leases; (iii) not to reassess initial direct costs for existing leases; and (iv) not to reassess certain land easements.
Leases	Leases The Company determines if an arrangement contains a lease at inception. Operating lease right-of-use (“ROU”) assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. The lease payments used to determine the operating lease assets may include lease incentives and stated rent increases. The Company does not include options to extend or terminate until it is reasonably certain that the option will be exercised. Lease expense is recognized on a straight-line basis over the lease term. The Company uses its incremental borrowing rate based on the information available at the commencement date in determining the lease liabilities as the Company’s leases generally do not provide an implicit rate. The Company elected not to recognize leases with an initial term of 12 months or less on its unaudited condensed consolidated balance sheets. The Company’s leases are reflected in operating lease ROU assets, operating lease liabilities and long-term operating lease liabilities in our unaudited condensed consolidated balance sheets. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company also has a real estate lease agreement which is subleased to a third party. The Company recognizes sublease income in Other income (expense), net on a straight-line basis over the lease term in its condensed consolidated statements of income.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash Restricted cash includes cash and cash equivalents that is restricted through legal contracts, regulations or our intention to use the cash for a specific purpose. Our restricted cash primarily relates to refundable deposits and funds held in escrow.
Revenue Recognition	Revenue Recognition On January 1, 2018, the Company adopted Accounting Standards Update No. 2014-09, "Revenue from Contracts with Customers" (Topic 606), using the modified retrospective transition method applied to those contracts which were not completed as of January 1, 2018. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts have not been adjusted and continue to be reported in accordance with our historic accounting under Topic 605. Under Topic 606, revenue is recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. The Company generates revenues primarily by delivering advertising on the Travelzoo website, in the Top 20 email newsletter, in Newsflash and from the Travelzoo Network. The Company also generates transaction-based revenues from the sale of vouchers through our Local Deals and Getaways product and operation of a hotel booking platform. The Company's disaggregated revenues are included in "Note 8: Segment Reporting and Significant Customer Information". For fixed-fee website advertising, the Company recognizes revenues ratably over the contracted placement period. For Top 20 email newsletter and other email products, the Company recognizes revenues when the emails are delivered to its members. The Company offers advertising on a cost-per-click basis, which means that an advertiser pays the Company only when a user clicks on an ad on Travelzoo properties or Travelzoo Network members’ properties. For these customers, the Company recognizes revenues each time a user clicks on the ad. The Company also offers advertising on other bases, such as cost-per-impression, which means that an advertiser pays the Company based on the number of times their advertisement is displayed on Travelzoo properties, email advertisements, Travelzoo Network properties, or social media properties. For these customers, the Company recognizes revenues each time an ad is displayed or email delivered. For transaction based revenues, including products such as Local Deals, Getaways and hotel platform, the Company evaluates whether it is the principal (i.e., report revenue on a gross basis) versus an agent (i.e., report revenue on a net basis). The Company reports transaction revenue on a net basis because the supplier is primarily responsible for providing the underlying service and we do not control the service provided by the supplier prior to its transfer to the customer. For Local Deals and Getaways products, the Company earns a fee for acting as an agent for the sale of vouchers that can be redeemed for services with third-party merchants. Revenues are presented net of the amounts due to the third-party merchants for fulfilling the underlying services. Certain merchant contracts allow the Company to retain the proceeds from unredeemed vouchers. With these contracts, the Company estimates the value of vouchers that will ultimately not be redeemed and records the estimate in the same period as the voucher sale. Commission revenue related to our hotel platform is recognized ratably over the period of guest stay, net of an allowance for cancellations based upon historical patterns. For arrangements for booking non-cancelable reservations where the Company’s performance obligation is deemed to be the successful booking of a hotel reservation, we record revenue for the commissions upon completion of the hotel booking. The Company’s contracts with customers may include multiple performance obligations in which the Company allocates revenues to each performance obligation based on its standalone selling price. The Company determines standalone selling price based on its overall pricing objectives, taking into consideration the type of services, geographical region of the customers, normal rate card pricing and customary discounts. Standalone selling price is generally determined based on the prices charged to customers when the product is sold separately. The Company relies upon the following practical expedients and exemptions allowed for in the ASC 606. The Company expenses sales commissions when incurred because the amortization period would be one year or less. These costs are recorded in sales and marketing expenses. In addition, the Company does not disclose the value of unsatisfied performance obligations for (a) contracts with an original expected length of one year or less and (b) contracts for which it recognizes revenues at the amount to which it has the right to invoice for services performed. Deferred revenue primarily consists of customer prepayments and undelivered performance obligations related to the Company’s contracts with multiple performance obligations.