XML 41 R32.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Summary of Significant Accounting Policies - Revenue by Major Payers (Details) - Customer Concentration Risk | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Medicare Advantage | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue | 23.00% | 13.00% | 19.00% | 12.00% |
Medicare Advantage | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 10.00% |  |
Medicare | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue | 15.00% | 19.00% | 18.00% | 19.00% |
Medicare | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 10.00% |  |
Aetna | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue | 10.00% |  |  |  |
Aetna | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 10.00% |  |
Blue Shield | Revenue Benchmark |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  | 11.00% |  | 11.00% |
Blue Shield | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  |  |  | 19.00%
United Healthcare | Accounts Receivable, Net |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Percent of total revenue |  |  | 14.00% |  | 18.00%

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_MajorCustomersAxis=exdx_MedicareAdvantageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=exdx_ReceivableBenchmarkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=exdx_MedicareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=exdx_AetnaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=exdx_BlueShieldMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=exdx_UnitedHealthcareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |