XML 59 R50.htm IDEA: XBRL DOCUMENT
v3.20.1

Redeemable Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended | 15 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 23, 2019 | Jan. 31, 2018 | Jul. 31, 2019 | May 31, 2019 | Mar. 31, 2019 | Jan. 31, 2019 | Jan. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2019 | Jul. 11, 2019 | Jul. 10, 2019 | Jan. 02, 2019 | Jan. 01, 2019
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,038,667,059 | 955,500,000 | 955,500,000 | 750,300,000
Temporary Equity, Shares Redeemed upon Conversion |  |  |  |  |  |  |  |  |  |  |  | 1,012,573,679 |  |  |  |  |  |
Deemed Dividend |  |  |  |  |  |  |  |  | $ 6,900 |  |  | $ 6,860 |  |  |  |  |  |
Beneficial conversion feature, temporary equity |  |  |  |  |  |  |  |  |  |  |  | $ 6,741 |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued upon conversion of redeemable convertible preferred shares (in shares) |  |  |  |  |  |  |  |  |  |  |  | 7,816,643 |  |  |  |  |  |
Common Stock | IPO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued upon conversion of redeemable convertible preferred shares (in shares) | 7,816,643 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series G redeemable convertible preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 205,200,000 |
Number of shares sold, temporary equity |  |  |  | 51,282,048 | 9,615,384 | 88,030,905 |  |  |  |  |  |  |  |  |  |  |  |
Sale of temporary equity, price per share (in dollars per share) |  |  |  |  |  | $ 0.078 |  |  |  |  |  | $ 0.078 |  |  |  |  |  |
Proceeds from sale of temporary equity |  |  |  | $ 4,000 |  |  |  |  |  | $ 3,750 |  |  |  | $ 7,600 |  |  |  |
Right to require mandatory purchase, temporary equity (in shares) |  |  |  | 32,051,280 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration to be received under mandatory purchase, temporary equity |  |  |  | $ 2,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity, Shares Redeemed upon Conversion |  |  | 148,928,337 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series F redeemable convertible preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares sold, temporary equity |  | 34,914,327 |  |  |  |  |  | 54,246,756 |  |  |  |  |  |  |  |  |  |
Sale of temporary equity, price per share (in dollars per share) |  |  |  |  |  |  | $ 0.078 | $ 0.078 |  |  |  |  | $ 0.078 |  |  |  |  |
Proceeds from sale of temporary equity |  | $ 2,700 |  |  |  |  |  | $ 4,200 |  |  |  |  |  |  |  |  |  |
Deemed Dividend |  |  |  |  |  |  |  |  |  |  | $ 1,200 |  |  |  |  |  |  |
Series H redeemable convertible preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 479,967,595 |  |  |
Number of shares sold, temporary equity |  |  | 233,446,519 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of temporary equity, price per share (in dollars per share) |  |  | $ 0.04712 |  |  |  |  |  |  |  |  | $ 0.047 |  |  |  |  |  |
Proceeds from sale of temporary equity |  |  | $ 11,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued upon conversion, temporary equity (in shares) |  |  | 246,521,076 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beneficial conversion feature, temporary equity |  |  |  |  |  |  |  |  | $ 6,700 |  |  | $ 6,741 | $ 0 |  |  |  |  |

X
- Definition Sale of Temporary Equity, Consideration Received on Transaction + References No definition available. + Details
Name: | exdx_SaleOfTemporaryEquityConsiderationReceivedOnTransaction
Namespace Prefix: | exdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Sale of Temporary Equity, Number of Shares Issued in Transaction + References No definition available. + Details
Name: | exdx_SaleOfTemporaryEquityNumberOfSharesIssuedInTransaction
Namespace Prefix: | exdx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sale of Temporary Equity, Price Per Share + References No definition available. + Details
Name: | exdx_SaleOfTemporaryEquityPricePerShare
Namespace Prefix: | exdx_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Temporary Equity, Consideration to be Received Under Mandatory Purchase + References No definition available. + Details
Name: | exdx_TemporaryEquityConsiderationToBeReceivedUnderMandatoryPurchase
Namespace Prefix: | exdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Temporary Equity, Deemed Dividend + References No definition available. + Details
Name: | exdx_TemporaryEquityDeemedDividend
Namespace Prefix: | exdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Temporary Equity, Deemed Dividends with Beneficial Conversion Feature + References No definition available. + Details
Name: | exdx_TemporaryEquityDeemedDividendsWithBeneficialConversionFeature
Namespace Prefix: | exdx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Temporary Equity, Rights for Mandatory Purchase + References No definition available. + Details
Name: | exdx_TemporaryEquityRightsForMandatoryPurchase
Namespace Prefix: | exdx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Temporary Equity, Shares Issued upon Conversion + References No definition available. + Details
Name: | exdx_TemporaryEquitySharesIssuedUponConversion
Namespace Prefix: | exdx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Temporary Equity, Shares Redeemed upon Conversion + References No definition available. + Details
Name: | exdx_TemporaryEquitySharesRedeemedUponConversion
Namespace Prefix: | exdx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued during the period as a result of the conversion of convertible securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-30) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_TemporaryEquityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_TemporaryEquitySharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesGPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesFPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesHPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |