Condensed Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS (USED IN) OPERATING ACTIVITIES
Net loss	$ (17,608,593)	$ (32,225,907)
Adjustments to reconcile net loss to net cash (used in) operations
Depreciation and amortization	61,799	82,463
Loss on disposal of fixed assets	432	2,099
Employee & director stock-based compensation	582,466	581,402
Stock warrant expense - noncash		152,554
Convertible note fair value adjustment	3,194,385	2,392,000
Changes in other assets and liabilities affecting cash flows from operations
Prepaid expenses, deposits and other assets	285,917	1,470,298
Accounts payable and accrued liabilities	(1,252,676)	3,183,419
Net cash (used in) operating activities	(14,736,270)	(24,361,672)
CASH FLOWS (USED IN) INVESTING ACTIVITIES
Purchase of investment	(7,955)
Purchase of fixed assets	(63,306)	(542,919)
Net cash (used in) investing activities	(71,261)	(542,919)
CASH FLOWS (USED IN) PROVIDED BY FINANCING ACTIVITIES
Fractional share payout	(658)
Proceeds from common stock option exercises		16,391
Proceeds from issuance of common stock by registered direct offerings		23,858,955
Net cash (used in) provided by financing activities	(658)	23,875,346
NET (DECREASE) CASH AND CASH EQUIVALENTS	(14,808,189)	(1,029,245)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	57,225,234	38,155,251
CASH AND CASH EQUIVALENTS AT END OF PERIOD	42,417,045	37,126,006
SUPPLEMENTAL SCHEDULE OF CASH FLOW INFORMATION
Interest paid	184,094	344,000
Shares issued for convertible senior notes and accrued interest	10,132,534
Purchase of fixed assets on account, non-cash investing activity		$ 38,386