Quarterly report pursuant to Section 13 or 15(d)

Merger with Private Molecular - Purchase Price for Threshold on Closing Date of Merger (Detail)

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Merger with Private Molecular - Purchase Price for Threshold on Closing Date of Merger (Detail) - Threshold
$ / shares in Units, $ in Thousands
Aug. 01, 2017
USD ($)
$ / shares
shares
Business Acquisition [Line Items]  
Number of shares of the combined company owned by Threshold stockholders | shares 6,508,356
Multiplied by the price per share of Threshold common stock | $ / shares $ 5.94
Purchase price before options $ 38,658
Threshold options assumed 1,006
Settlement of preexisting bridge note with Threshold (4,010)
Total purchase price $ 35,654