Organization, Description of Business and Basis for Presentation	9 Months Ended
Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization, Description of Business and Basis for Presentation	1. Organization, Description of Business and Basis for Presentation Organization—Aquantia Corp. (together with its subsidiaries, the “Company”) was incorporated in Delaware on January 27, 2004. The Company is a leader in the design, development and marketing of advanced high-speed communications integrated circuits (“ICs”), for Ethernet connectivity in the data center, enterprise infrastructure, access and automotive markets. Initial Public Offering—On November 7, 2017, the Company completed its initial public offering (“IPO”) of 7,840,700 shares of its common stock at the offering price of $9.00 per share, including 1,022,700 shares pursuant to the underwriters’ option to purchase additional shares of the Company’s common stock, resulting in net proceeds to the Company of $65.6 million after deducting underwriters' discounts and commissions of $4.9 million, but before deducting total offering expenses of approximately $5.7 million which were reclassified to additional paid-in capital upon completion of the IPO. Immediately prior to the closing of the IPO, all outstanding shares of the Company’s convertible preferred stock automatically converted into shares of its common stock and the Company’s convertible preferred stock warrants automatically converted into warrants to purchase common stock. The Company used $9.2 million and $0.3 million of the IPO proceeds, respectively, to repay the outstanding indebtedness under the Company’s loan from Pinnacle Ventures, L.L.C. and the termination fee for the line of credit from Hercules in 2017, respectively. Basis of Presentation and Principles of Consolidation—The accompanying unaudited condensed consolidated financial statements included herein have been prepared by us in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”), for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”). In the opinion of management, normal recurring adjustments considered necessary for a fair presentation have been reflected in these condensed consolidated financial statements. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet as of December 31, 2017 has been derived from the audited financial statements for the fiscal year then ended included in the Company’s Annual Report on Form 10-K filed with the SEC on March 7, 2018 (the “2017 Annual Report on Form 10-K”), but does not include all of the information and notes required by U.S. GAAP for complete consolidated financial statements. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements as of and for the fiscal year ended December 31, 2017 and the related notes thereto included in the 2017 Annual Report on Form 10-K.

1. Organization, Description of Business and Basis for Presentation

Organization—Aquantia Corp. (together with its subsidiaries, the “Company”) was incorporated in Delaware on January 27, 2004. The Company is a leader in the design, development and marketing of advanced high-speed communications integrated circuits (“ICs”), for Ethernet connectivity in the data center, enterprise infrastructure, access and automotive markets.

Initial Public Offering—On November 7, 2017, the Company completed its initial public offering (“IPO”) of 7,840,700 shares of its common stock at the offering price of $9.00 per share, including 1,022,700 shares pursuant to the underwriters’ option to purchase additional shares of the Company’s common stock, resulting in net proceeds to the Company of $65.6 million after deducting underwriters' discounts and commissions of $4.9 million, but before deducting total offering expenses of approximately $5.7 million which were reclassified to additional paid-in capital upon completion of the IPO. Immediately prior to the closing of the IPO, all outstanding shares of the Company’s convertible preferred stock automatically converted into shares of its common stock and the Company’s convertible preferred stock warrants automatically converted into warrants to purchase common stock. The Company used $9.2 million and $0.3 million of the IPO proceeds, respectively, to repay the outstanding indebtedness under the Company’s loan from Pinnacle Ventures, L.L.C. and the termination fee for the line of credit from Hercules in 2017, respectively.

Basis of Presentation and Principles of Consolidation—The accompanying unaudited condensed consolidated financial statements included herein have been prepared by us in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”), for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”). In the opinion of management, normal recurring adjustments considered necessary for a fair presentation have been reflected in these condensed consolidated financial statements. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations.

The condensed consolidated balance sheet as of December 31, 2017 has been derived from the audited financial statements for the fiscal year then ended included in the Company’s Annual Report on Form 10-K filed with the SEC on March 7, 2018 (the “2017 Annual Report on Form 10-K”), but does not include all of the information and notes required by U.S. GAAP for complete consolidated financial statements. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with the audited consolidated financial statements as of and for the fiscal year ended December 31, 2017 and the related notes thereto included in the 2017 Annual Report on Form 10-K.