Summary of Significant Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2013

Accounting Policies [Abstract]

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table presents information about our warrant liability, which was our only financial instrument measured at fair value on a recurring basis using significant unobservable inputs (Level 3) as of April 30 (dollars in thousands):

	2013		2012
Balance beginning of year	$	(555)	$	(972)
Transfers to (from) Level 3		-		-
Total gains (losses) included in earnings		(74)		417
Issuances		(417)		-
Balance end of year.	$	(1,046)	$	(555)

Property, Plant and Equipment [Table Text Block]

Property and equipment consisted of the following (in thousands):

	April 30,
	2013		2012
Furniture and fixtures	$	59	$	58
Computer equipment and software		549		287
Laboratory equipment		179		167
Leasehold improvements		2		2
Sortware in-progress		-		216
Total property and equipment		789		730
Less: Accumulated depreciation		(375)		(170)
Property and equipment, net	$	414	$	560

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table reflects the total potential share-based instruments outstanding at April 30, 2013 and 2012 that could have an effect on the future computation of dilution per common share:

	Year Ended April 30,
	2013		2012
Stock options		13,890,205		14,866,038
Warrants		3,276,667		1,416,667
Restricted stock		50,000		25,000
Total common stock equivalents		17,216,872		16,307,705