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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |
Other-than-temporary impairments |  | $ 0 | $ 0 | $ 0
Revenue, practical expedient, remaining performance obligation, description |  | In accordance with ASU 2014-09, the Company has elected not to disclose the aggregate amount of the transaction price allocated to remaining performance obligations for its contracts that are one year or less, as the revenue is expected to be recognized within the next year. Furthermore, the Company has elected not to disclose the aggregate amount of the transaction price allocated to remaining performance obligations for its agreements wherein the Company’s right to payment is in an amount that directly corresponds with the value of Company’s performance to date. However, periodically the Company enters into arrangements with customers to provide diagnostic testing and/or pharmaceutical and clinical services that may have terms longer than one year and include multiple performance obligations. |  |
Revenue, practical expedient, remaining performance obligation |  | true |  |
Revenue, practical expedient, initial application and transition, nondisclosure of transaction price allocation to remaining performance obligation |  | true |  |
Revenue, remaining performance obligation | $ 3,200,000 | $ 3,200,000 |  |
Revenue increase (decrease) performance obligation | (7,600,000) | 2,600,000 |  |
Capitalized costs incurred to obtain or fulfill contract | 0 | $ 0 |  |
Revenue practical expedient, incremental cost of obtaining contract |  | true |  |
Revenue, performance obligation, description of payment terms |  | This practical expedient has been elected because the Company collects very little cash from customers under payment terms and vast majority of payments terms have a payback period of less than one year. |  |
Minimum [Member] | ASU 2016-02 [Member] |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |
ROU assets | 68,000,000 | $ 68,000,000 |  |
Lease liabilities | 73,000,000 | 73,000,000 |  |
Maximum [Member] | ASU 2016-02 [Member] |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |
ROU assets | 75,000,000 | 75,000,000 |  |
Lease liabilities | $ 79,000,000 | $ 79,000,000 |  |
Equipment [Member] | Minimum [Member] |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |
Estimated useful lives, in years |  | 5 years |  |
Equipment [Member] | Maximum [Member] |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |
Estimated useful lives, in years |  | 7 years |  |
Leasehold Improvements [Member] | Minimum [Member] |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |
Estimated useful lives, in years |  | 3 years |  |
Leasehold Improvements [Member] | Maximum [Member] |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |
Estimated useful lives, in years |  | 10 years |  |

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