Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (2,283,946)	$ (2,130,216)
Adjustments to reconcile net loss to net cash used by operating activities:
Allowance for doubtful accounts	(10,256)	19,386
Depreciation and amortization of fixed assets	643,262	668,171
Amortization of deferred financing costs and other assets	26,577	206,038
Gain on fair value of warrant liabilities	(379,095)	(257,000)
Accretion of asset retirement obligation	46,062	42,111
Share-based compensation	99,568	68,622
Changes in operating assets and liabilities:
Accounts receivable	(50,006)	(34,433)
Inventory	(161,103)	(47,128)
Other receivables	406,426
Prepaid expenses and other current assets	(13,617)	(14,521)
Accounts payable and accrued expenses	(26,441)	(80,661)
Accrued protocol expense	(11,493)	(163,032)
Accrued radioactive waste disposal	(68,060)	36,000
Accrued payroll and related taxes	(54,303)	(114,412)
Accrued vacation	12,206	(7,293)
Net cash used by operating activities	(1,824,219)	(1,808,368)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of fixed assets	(26,000)	(105,401)
Additions to licenses and other assets	(42,900)
Change in restricted cash	(187)	(571)
Net cash used by investing activities	(69,087)	(105,972)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on notes payable		(38,334)
Preferred dividends paid	(10,632)	(10,632)
Proceeds from sales of common stock, pursuant to registered direct offering	2,592,549	2,250,000
Proceeds from sales of common stock, pursuant to at the market offering		368,781
Proceeds from sales of common stock, pursuant to exercise of warrants	40,244	215,027
Proceeds from sales of common stock, pursuant to exercise of options	1,352
Stock offering costs	(318,064)	(385,318)
Net cash provided by financing activities	2,305,449	2,399,524
Net increase in cash and cash equivalents	412,143	485,184
Cash and cash equivalents, beginning of period	2,112,254	2,990,744
CASH AND CASH EQUIVALENTS, END OF PERIOD	2,524,397	3,475,928
Non-cash investing and financing activities:
Initial fair value of warrant liabilities	$ 484,000	$ 1,724,000