v3.3.1.900

Warrants | 12 Months Ended
--- | ---
Dec. 31, 2015
Warrants. |
Warrants | 9. Warrants In 2007, the Company issued warrants to purchase an aggregate of 24,538 shares of common stock at an exercise price of $0.0978 per share to various holders. As of December 31, 2015, these warrants were fully exercised. In 2009, the Company granted warrants to purchase 33,742 shares of Series B convertible preferred stock at an exercise price of $1.8908 per share. The warrants were granted to a financial institution in connection with a secured equipment loan and expire on November 2, 2019. In connection with the IPO in July 2015, these warrants were converted into the right to purchase common stock at a one-to-one ratio. In December 2015, the financial institution net-exercised all 33,742 of their warrant shares at the strike price of $1.8908 per share. Based on the Natera closing price of $11.57 per share on the prior business day, Natera issued 28,227 shares to the financial institution. In April 2014, the Company granted warrants to purchase approximately 376,691 warrant s to purchase common stock at an exercise price of $2.3229 per common share. The warrants were granted to ROS Acquisition Offshore LP in connection with our senior secured term loan and expire on April 18, 2023. It was determined that the warrants granted are detachable and therefore are a stand-alone component of the senior secured term loan to be fair valued using Level III inputs as a separate derivative. As of December 31, 2015, these warrants remained exercisable for common stock. In connection with the Series F financing, the Series E preferred stockholders agreed to change the liquidation preference from two times to one times the liquidation value as described in the agreement. In exchange, on November 20, 2014, the Company issued common stock warrants to the Series E preferred stockholders to purchase 429,440 shares at $0.0163 per share. The warrants are carried in Additional Paid In Capital and the issuance of the warrants was treated as a deemed dividend by the common stockholder out of Additional Paid in Capital. In connection with the IPO in July 2015, such warrants were automatically net exercised into 429,042 shares of common stock.

X
- Definition The entire disclosure for information about warrants. + References No definition available. + Details
Name: | ntra_WarrantsDisclosureTextBlock
Namespace Prefix: | ntra_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsNoteDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration