Related Party Transactions	9 Months Ended
Related Party Transactions	Sep. 30, 2022
Related Party Transactions [Abstract]
Related Party Transactions	Promissory Note Payable to a Related Party On March 10, 2022, Mr. Robert W. Duggan, entered into a Note Purchase Agreement (the “2022 Note”), pursuant to which he loaned the Company $25,000 in exchange for the issuance by the Company of an unsecured promissory note in the amount of $25,000. The 2022 Note accrued interest at a rate per annum equal to the prime rate as reported in the Wall Street Journal. The 2022 Note, including all accrued interest, became due upon the earlier of (i) the consummation of a registered public offering with net proceeds of no less than $25,000 or (ii) 18 months from the date of issuance of the 2022 Note. Debt issuance costs associated with the 2022 Note were immaterial and expensed as incurred. The 2022 Note of $25,000, plus accrued interest of $434 has been repaid to Mr. Robert W. Duggan on August 10, 2022 in connection with the completion of the rights offering with aggregate gross proceeds of $100,000. The Company incurred interest expense of $692 and $1,497 for the three and nine months ended September 30, 2022, which included imputed interest of $570 and $1,063 for the three and nine months ended September 30, 2022, respectively. Imputed interest is calculated as the difference between the stated rate of the note and the deemed market rate of interest and is recorded to additional paid-in capital. The Company incurred interest expense of $0 and $244 for the three and nine months ended September 30, 2021, which included imputed interest of $0 and $159 for the three and nine months ended September 30, 2021, respectively, related to the March 24, 2021 Note Purchase Agreement with Mr. Robert W. Duggan ("the Initial Note"), for $55,000 which was subsequently rescinded and replaced by a second note ("the Second Note"), of the same amount, and paid in full in May 2021, as described further in Note 15. Related Party Transactions March 24, 2021 Note Purchase Agreement On March 24, 2021, Mr. Duggan, the Company's Executive Chairman and Chief Executive Officer and primary stockholder, entered into a Note Purchase Agreement (the “Initial Purchase Agreement”) pursuant to which he loaned the Company $55,000 in exchange for the issuance by the Company of an unsecured promissory note (the “Initial Note”) in the amount of $55,000. The Initial Note was to accrue interest at a rate per annum equal to 150% of the applicable 10 Year US Treasury rate, as adjusted monthly. The rate was initially estimated to be approximately 2.4%. The terms of the Initial Note were that it would mature and become due upon the earlier of (i) the consummation of a registered public offering with net proceeds of no less than $55,000, or (ii) 13 months from the date of issuance of the Initial Note. On April 20, 2021, the Company determined, with Mr. Duggan’s agreement, to rescind both the Initial Purchase Agreement and the Initial Note issued thereunder, and repaid the principal amount of the Initial Note in full, without interest or penalty. April 20, 2021 Note Purchase Agreement On April 20, 2021, subsequent to the repayment of the Initial Note, Mr. Duggan entered into a second Note Purchase Agreement (the “Second Purchase Agreement”) pursuant to which he loaned the Company $55,000 in exchange for the issuance by the Company of an unsecured promissory note (the “Second Note”) in the amount of $55,000. The Second Note accrued interest at a rate per annum equal to 150% of the applicable 10 Year US Treasury rate, as adjusted monthly (initially estimated to be approximately 2.4%). The Company was permitted to prepay any portion of the Second Note at its option without penalty. May 12, 2021 Rights Offering On May 12, 2021, the Company closed its rights offering, which was fully subscribed. Aggregate gross proceeds from the rights offering of $75,000 from the sale of 14,312,976 shares of the Company's common stock, of which 11,365,921 shares were purchased by Mr. Robert W. Duggan and 389,977 shares were purchased by Dr. Maky Zanganeh, at price of $5.24 per share. In connection with the closing of the rights offering, the Second Note, issued by the Company in favor of Mr. Robert W. Duggan, matured and became due and was repaid using a portion of the proceeds from the rights offering. March 26, 2021 Sublease Agreement with Maky Zanganeh and Associates, Inc. On March 26, 2021, the Company entered into a sublease with Maky Zanganeh and Associates, Inc. ("MZA") consisting of 4,500 square feet of office space at 2882 Sand Hill Road, Menlo Park, California (the “Sublease”). Dr. Maky Zanganeh, the Company's Co-Chief Executive Officer and President, is the sole owner of MZA. The sublease ran until September 2022. The rent payable under the terms of the sublease was equivalent to the proportionate share of the rent payable by MZA to the third-party landlord, based on the square footage of office space sublet by the Company, and no mark-up has been applied. During the three and nine months ended September 30, 2022, payments of $186 and $544, respectively, were made pursuant to the sublease. During the three and nine months ended September 30, 2021 payments of $174 and $377, respectively were made to the landlord. July 25, 2022 First Amendment to Sublease Agreement with Maky Zanganeh and Associates, Inc. On July 25, 2022 the Company entered into a first amendment, dated July 19, 2022, to its existing sublease agreement with MZA, described above. The existing sublease term, which was set to expire on September 30, 2022, was extended for a period of thirty-nine months from October 1, 2022 through December 31, 2025. The rent payable under the terms of the sublease is equivalent to the proportionate share of the net payable by MZA to the third-party landlord, based on the square footage of office space sublet by the Company, and no mark-up has been applied. July 29, 2022 Second Amendment to Sublease Agreement with Maky Zanganeh and Associates, Inc. On July 29, 2022, the Company entered into a second amendment, dated August 1, 2022, to its existing sublease agreement with MZA, described above. The second amendment was effective as of August 1, 2022 and expires on December 31, 2025. The second amendment includes an additional 1,277 square feet (the "Expansion Premises") of office space at 2882 Sand Hill Road, Menlo Park, California. The rent payable under the terms of the sublease is equivalent to the proportionate share of the net payable by MZA to the third-party landlord, based on the square footage of office space sublet by the Company, and no mark-up has been applied. March 10, 2022 Note Purchase Agreement On March 10, 2022, the Company entered into a Note Purchase Agreement (the "2022 Note"), with Mr. Duggan, pursuant to which Mr. Duggan loaned the Company $25,000 in exchange for the issuance by the Company of an unsecured promissory note in the amount of $25,000. The 2022 Note accrued interest at a rate per annum equal to the prime rate as reported in the Wall Street Journal, which was 3.25% as of the effective date and 4.75% as of June 30, 2022. The 2022 Note, including accrued interest, became due upon the earlier of (i) the consummation of a registered public offering with net proceeds of no less than $25,000 or (ii) 18 months from the date of issuance of the 2022 Note, and was repaid on August 10, 2022. 2022 Rights Offering In August 2022, the Company announced the closing and final results of its previously announced rights offering. The rights offering commenced on July 18, 2022, and the associated subscription rights expired on August 8, 2022. Aggregate gross proceeds received from the rights offering were $100,000 from the sale of 103,092,783 shares of common stock. Mr. Robert W. Duggan and Dr. Maky Zanganeh fully subscribed to their respective basic subscription rights and oversubscribed, at a price of $0.97 per share. Issuance costs were $111. In connection with the closing of the rights offering, the 2022 Note matured and became due, and the Company repaid all principal and accrued interest thereunder using a portion of the proceeds from this rights offering on August 10, 2022.