Document and Entity Information
Nov. 08, 2019
Cover [Abstract]  
Security Exchange Name NASDAQ
Amendment Flag true
Entity Central Index Key 0001428439
Document Type 8-K/A
Document Period End Date Nov. 08, 2019
Entity Registrant Name ROKU, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-38211
Entity Tax Identification Number 26-2087865
Entity Address, Address Line One 150 Winchester Circle
Entity Address, City or Town Los Gatos
Entity Address, State or Province CA
Entity Address, Postal Zip Code 95032
City Area Code 408
Local Phone Number 556-9040
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Class A Common Stock, $0.0001 par value
Trading Symbol ROKU
Entity Emerging Growth Company false
Amendment Description On November 14, 2019, Roku, Inc. filed a Current Report on Form 8-K (the “Original Form 8-K”), reporting, among other items, that on November 8, 2019, through our wholly-owned subsidiary Delaware Acquisition Company, Inc., we consummated the previously announced acquisition of Dataxu, Inc., a Delaware corporation, pursuant to the Agreement and Plan of Merger dated October 22, 2019, as amended on November 8, 2019 (the “Merger”). This Amendment No. 1 to Current Report on Form 8-K amends the Original Form 8-K to provide (i) the historical financial statements of Dataxu, Inc. and (ii) the unaudited pro forma condensed combined financial information required by Items 9.01(a) and 9.01(b) of Current Report on Form 8-K, respectively. Such financial information was excluded from the Original Form 8-K in reliance on the instructions to such items. This Amendment No. 1 to Current Report on Form 8-K further amends Items 2.01 and 3.02 to lower the number of shares of Class A common stock issued to the former Dataxu securityholders from 571,516 shares to 571,459 shares due to the elimination of fractional shares.