Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net loss	$ (3,331,708)	$ (1,087,414)
Adjustments to reconcile net loss to net cash used in operating activities:
Amortization and depreciation	62,087	56,498
Restricted common stock issued to vendors	153,540	32,888
Warrants issued to vendors	4,775
Stock-based compensation	176,662	79,492
Change in fair value of warrant liability	1,742,090
Change in operating assets and liabilities:
Grants receivable	172,740	(317,544)
Taxes receivable	750,356
Prepaid expenses	37,771	(30,085)
Accounts payable	32,338	527,238
Accrued compensation	(188,430)	(5,432)
Total adjustments	2,943,929	343,055
Net cash used in operating activities	(387,779)	(744,359)
Investing activities
Purchases of fixed assets	(19,863)
Net cash used in investing activities	(19,863)
Financing Activities:
Net proceeds from issuance of common stock pursuant to the equity line	158,250
Net cash provided by financing activities	158,250
Net decrease in cash and cash equivalents	(249,392)	(744,359)
Cash and cash equivalents at beginning of period	5,856,242	3,356,380
Cash and cash equivalents at end of period	5,606,850	2,612,021
Supplemental disclosure of non cash investing and financing activities:
Reclassification of warrant liability upon partial exercise of warrants issued in unit offering	$ 502,025