Balance Sheets (Unaudited) (USD $)	Jul. 31, 2013	Apr. 30, 2013
ASSETS
Cash and cash equivalents	$ 4,073,041	$ 783,528
Accounts receivable	96,786	445,237
Government grant receivable	23,789	96,226
Inventory	98,936	99,204
Prepaid expenses	124,440	247,646
Other current assets	169,591	170,410
Total current assets	4,586,583	1,842,251
Property and equipment, net	182,769	205,389
Debt issuance costs, net	117,889	150,043
Intangible assets, net	943,175	924,698
Other assets	58,262	58,262
Total assets	5,888,678	3,180,643
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Accounts payable	969,568	977,162
Accrued liabilities	319,316	874,876
Current portion of notes payable, net	3,425,942	57,539
Total current liabilities	4,714,826	1,909,577
Other liabilities	43,728	54,660
Long-term portion of notes payable, net		2,994,442
Total liabilities	4,758,554	4,958,679
Stockholders' equity (deficit)
Preferred stock, undesignated, authorized 9,985,031 and 9,990,400 shares; respectively. See Note 5 and Note 8.
Series B Preferred stock, par value $.0001, issued 2,100 shares; outstanding 133 and 987, respectively. See Note 8.	1	1
Series C Preferred stock, par value $.0001, issued 5,369 shares; outstanding 4,425 and 0, respectively. See Note 8.	1
Common stock, par value $.0001 per share; authorized 400,000,000 shares; issued and outstanding 3,062,190 and 1,930,078, respectively	306	193
Additional paid-in capital	120,419,172	115,265,854
Deficit accumulated during the development stage	(119,289,356)	(117,044,084)
Total stockholders' equity (deficit)	1,130,124	(1,778,036)
Total liabilities and stockholders' equity (deficit)	$ 5,888,678	$ 3,180,643