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v3.8.0.1

License and Other Revenue - Additional Information (Detail) | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2013 USD ($) | Jun. 30, 2013 USD ($) | Jun. 30, 2013 EUR (€) | Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2017 USD ($) | Jun. 30, 2013 EUR (€)
License And Other Revenue [Line Items] |  |  |  |  |  |  |
Description of agreement expire term |  |  |  | The agreement will expire at the later of the last-to-expire patent in the EEA or ten years from the first commercial sale of the test in the EEA, which occurred in 2014. |  |  |
Common stock value |  |  |  | $ 35,000 |  | $ 29,000 |
Upfront cash payment |  | $ 408,000 | € 387,500 |  |  |  |
Revenues and royalties recognized |  |  |  | 10,000 | $ 0 |  |
Royalty revenues |  |  |  | 100,000 | $ 0 |  |
Royalty revenues receivable balance |  |  |  | $ 0 |  | $ 0 |
Diaxonhit [Member] |  |  |  |  |  |  |
License And Other Revenue [Line Items] |  |  |  |  |  |  |
Common stock value |  | $ 476,000 |  |  |  |  | € 387,500
Shares sold for consideration | $ 467,000 |  |  |  |  |  |

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