Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 53,408,680	$ 13,000,372
Prepaid expenses	0	160,320
Total current assets	53,408,680	13,160,692
Property and equipment, net of accumulated depreciation of $3,071,386 and $2,531,917, at June 30, 2013 and December 31, 2012, respectively	9,854,828	1,536,658
Restricted cash	17,439	17,439
Total assets	63,280,947	14,714,789
Current liabilities
Accounts payable	1,289,210	348,683
Bonus accrual	273,675	0
Deferred revenue	5,000,000	0
Total current liabilities	6,562,885	348,683
Total liabilities	6,562,885	348,683
Commitments and contingencies (Note 3)
Shareholders’ equity
Common stock, $0.001 par value; 100,000,000 shares authorized, 12,037,487 shares issued and outstanding at June 30, 2013 and 9,854,268 shares issued and outstanding at December 31, 2012	12,037	9,854
Additional paid-in capital	131,767,395	85,669,802
Accumulated deficit	(75,061,370)	(71,313,550)
Total shareholders’ equity	56,718,062	14,366,106
Total liabilities and shareholders’ equity	$ 63,280,947	$ 14,714,789