v3.3.1.900

CommonStock | 12 Months Ended
--- | ---
Dec. 31, 2015
Common Stock. |
Common Stock | 11. Common Stock The Company's Certificate of Incorporation, as restated in connection with the closing of the IPO, authorizes the Company to issue 750.0 million shares of common stock with a par value of $0.0001 per share. As of December 31, 2015 and December 31, 2014, the Company had 50.3 million and 6.9 million shares of common stock outstanding, respectively. Each shareholder of common stock is entitled to one vote for each share on all matters submitted to a vote of the stockholders. The Company's board of directors and stockholders approved an amendment to its Certificate of Incorporation to effect a 1-for-1.63 reverse split of its capital stock, which was effected on June 19, 2015. All references to common stock, options to purchase common stock, restricted stock, share data, per share data, warrants, convertible preferred stock and related information have been retroactively adjusted where applicable in this report to reflect the reverse stock split of the Company's capital stock as if it had occurred at the beginning of the earliest period presented.

X
- Definition The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to common stock. + References No definition available. + Details
Name: | ntra_CommonStockTextBlock
Namespace Prefix: | ntra_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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