Condensed Statements of Cash Flows (USD $)	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS (USED IN) OPERATING ACTIVITIES
Net loss	$ (32,225,907)	$ (21,334,770)
Adjustments to reconcile net loss to net cash (used in) operations
Depreciation and amortization	82,463	87,967
Loss on disposal of fixed assets	2,099
Employee & director stock-based compensation	581,402	483,636
Stock warrant expense - noncash	152,554	57,195
Convertible note fair value adjustment	2,392,000	1,790,916
Changes in other assets and liabilities affecting cash flows from operations
Prepaid expenses, deposits and other assets	1,470,298	1,113,203
Accounts payable and accrued liabilities	3,183,419	2,760,133
Net cash (used in) operating activities	(24,361,672)	(15,041,720)
CASH FLOWS (USED IN) INVESTING ACTIVITIES
Purchase of fixed assets	(542,919)	(23,789)
Net cash (used in) investing activities	(542,919)	(23,789)
CASH FLOWS PROVIDED BY FINANCING ACTIVITIES
Proceeds from common stock option exercises	16,391
Proceeds from issuance of common stock by registered direct offerings	23,858,955	31,589,156
Net cash provided by financing activities	23,875,346	31,589,156
NET (DECREASE) INCREASE CASH AND CASH EQUIVALENTS	(1,029,245)	16,523,647
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	38,155,251	29,858,465
CASH AND CASH EQUIVALENTS AT END OF PERIOD	37,126,006	46,382,112
SUPPLEMENTAL SCHEDULE OF CASH FLOW INFORMATION
Interest paid	344,000	344,000
Noncash investing and financing activities
Purchase of fixed assets on account, non-cash investing activity	$ 38,386

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-URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4569616-111683

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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- Details

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