Acquisition of Isconova AB (Details) In Thousands, except Share data, unless otherwise specified	1 Months Ended
	Jul. 31, 2013 USD ($)	Jul. 31, 2013 SEK
Acquisition Of Isconova AB [Abstract]
Novavax shares issued for Isconova AB shares acquired	15,100,000	15,100,000
Offer to cash out warrants	$ 22,000	140,285
Shares issued for private offer	218,120	218,120