Date when an entity was incorporated

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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Value of all classes of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares exclude common shares repurchased by the entity and held as treasury shares.

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Face (par) amount of debt instrument at time of issuance.

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The cash inflow from the additional capital contribution to the entity.

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Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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No definition available.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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No definition available.

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- Definition

Per share or per unit amount of equity securities issued.

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- Definition

Number of new stock issued during the period.

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- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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- Definition

The additional enterprise value added to the base value of the Company in order to determine the value in the merger agreement.

+ References

No definition available.

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- Definition

The Company's valuation, as defined in the merger agreement, based on projected net cash, cash equivalents and marketable securities balance minus outstanding liabilities, subject to adjustment.

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- Definition

The amount of daily reduction in target net cash, lower target net cash and upper target net cash from the date identified through the closing date of the merger, dependent on the Company's actual net cash balance.

+ References

No definition available.

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- Definition

Date of merger agreement.

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- Definition

The amount of daily increase in the valuation of the company being merged into from the date identified through the closing date of the merger, dependent on the Company's actual net cash balance.

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No definition available.

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- Definition

The minimum default amount over which the lender may exercise remedies against the Company.

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No definition available.

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The minimum amount of net cash required to be held as a condition of the merger agreement.

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No definition available.

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- Definition

Merger agreement termination fee to be paid by either party to other party upon termination of agreement.

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The amount of net cash held by the Company, as presented in a range of values, that will determine whether an adjustment will be made to the ownership percentages as part of a merger agreement. If the Company's net cash is between the minimum and maximum thresholds, no adjustment will be made.

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Net proceeds from sale of securities.

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Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]

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- Definition

The percentage of outstanding shares of the company's common stock on a fully diluted basis that are expected to be owned immediately following the merger.

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No definition available.

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- Definition

The amount of third party expenses that may be required to be paid to the other party in the event of termination of the merger agreement.

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No definition available.

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Nature of the Business and Basis of Presentation - Additional Information (Detail) - USD ($)				3 Months Ended	173 Months Ended
	Mar. 31, 2020	Dec. 17, 2019	Jul. 02, 2018	Mar. 31, 2020	Mar. 31, 2020	Apr. 21, 2020	Dec. 31, 2019	Dec. 29, 2017
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Entity incorporation date				Nov. 22, 2005
Adjusted ownership value prior to closing merger		$ 40,000,000
Additional enterprise value		5,000,000
Cash valuation reduction	$ 21,311
Merger agreement minimum required net cash thresholds	30,000,000	$ 30,000,000		$ 30,000,000	$ 30,000,000
Accumulated deficit	399,949,000			399,949,000	399,949,000		$ 396,351,000
Net proceeds from sale of securities					397,900,000
Credit facility default amount	300,000			300,000	300,000
Total cash, cash equivalents and marketable securities	63,900,000			63,900,000	63,900,000
Term Loan [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Aggregate principal balance	12,700,000			12,700,000	12,700,000			$ 20,000,000
Loan agreement minimum liquidity required	13,400,000			13,400,000	13,400,000		$ 15,300,000
Credit facility default amount	300,000			300,000	300,000
Public Offering [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Issuance of common stock			9,200,000
Share price per share			$ 7.50
Net proceeds from public offering, after underwriting discount, commission and offering expenses			$ 64,600,000
Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Net cash threshold	40,500,000			40,500,000	40,500,000
Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Net cash threshold	39,500,000			39,500,000	39,500,000
Minimum [Member] \| Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Bid price of share as per rule						$ 1.00
Minimum [Member] \| Term Loan [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Total cash, cash equivalents and marketable securities	55,000,000			$ 55,000,000	$ 55,000,000
Chondrial Security Holders [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of expected diluted common shares immediately after merger		60.00%
Common stock, value immediately after merger		$ 67,500,000
Increase in valuation of ownership	$ 111,656
Company Stockholders Prior to Merger [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of expected diluted common shares immediately after merger		40.00%
Common stock, value immediately after merger		$ 45,000,000
Chondrial Therapeutics Inc. [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Date of merger agreement		Dec. 17, 2019
Merger agreement termination fee to be paid by either party to other party upon termination of agreement		$ 3,375,000
Merger agreement minimum required net cash thresholds		$ 0
Beneficiary interest percentage in outstanding common stock		9.70%
Chondrial Therapeutics Inc. [Member] \| Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Additional third party expenses to be paid by either party to other party upon termination of merger agreement		$ 350,000