Acquisition of Isconova AB	6 Months Ended
Jun. 30, 2013
Acquisition Of Isconova AB [Abstract]
Acquisition Of Isconova AB	Note 13 - Acquisition of Isconova AB On July 31, 2013, the Company announced that, pursuant to its public tender offer to acquire all outstanding shares and warrants of Sweden-based Isconova AB ("Isconova") directly from such holders and a private offer for all outstanding stock options, it had acquired: 97.4% of the outstanding Isconova shares for approximately 15.1 million shares of Novavax Common Stock; 100% of the outstanding 2005-I warrants and 2005-II warrants for SEK 140,285 (or approximately $22,000 based on current exchange rate); and 100% of the stock options, for which it will issue 218,120 shares of Novavax Common Stock. The Company initiated the public tender offer on July 9, 2013 and expects to settle these transactions in August 2013. In addition, the Company has extended the tender acceptance period until August 20, 2013 in order to attempt to acquire the remaining 2.6% of the outstanding Isconova shares. Isconova has focused its recent efforts on the development of saponin-based, immune-modulating adjuvants that work with different types of vaccine antigens to enhance the immunogenic effect of the antigen. A number of vaccines are under development by various vaccine companies, as well as by Isconova, using Isconova's third generation nanoparticle adjuvant, Matrix-M™. The Company believes that Isconova's adjuvants will be powerful complements to its recombinant vaccine programs as three of its clinical-stage programs and many of its pre-clinical programs are currently testing adjuvants to see whether immune responses can be enhanced.

Note 13 - Acquisition of Isconova AB

On July 31, 2013, the Company announced that, pursuant to its public tender offer to acquire all outstanding shares and warrants of Sweden-based Isconova AB ("Isconova") directly from such holders and a private offer for all outstanding stock options, it had acquired: 97.4% of the outstanding Isconova shares for approximately 15.1 million shares of Novavax Common Stock; 100% of the outstanding 2005-I warrants and 2005-II warrants for SEK 140,285 (or approximately $22,000 based on current exchange rate); and 100% of the stock options, for which it will issue 218,120 shares of Novavax Common Stock. The Company initiated the public tender offer on July 9, 2013 and expects to settle these transactions in August 2013. In addition, the Company has extended the tender acceptance period until August 20, 2013 in order to attempt to acquire the remaining 2.6% of the outstanding Isconova shares.

Isconova has focused its recent efforts on the development of saponin-based, immune-modulating adjuvants that work with different types of vaccine antigens to enhance the immunogenic effect of the antigen. A number of vaccines are under development by various vaccine companies, as well as by Isconova, using Isconova's third generation nanoparticle adjuvant, Matrix-M™. The Company believes that Isconova's adjuvants will be powerful complements to its recombinant vaccine programs as three of its clinical-stage programs and many of its pre-clinical programs are currently testing adjuvants to see whether immune responses can be enhanced.