CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($)		3 Months Ended
		Jul. 31, 2017	Jul. 31, 2016
REVENUES:
Contract manufacturing revenue		$ 27,077,000	$ 5,609,000
COSTS AND EXPENSES:
Cost of contract manufacturing		20,448,000	3,062,000
Research and development		3,645,000	8,569,000
Selling, general and administrative		4,213,000	5,060,000
Total costs and expenses		28,306,000	16,691,000
LOSS FROM OPERATIONS		(1,229,000)	(11,082,000)
OTHER INCOME (EXPENSE):
Interest and other income		27,000	25,000
Interest and other expense		(3,000)	0
NET LOSS		(1,205,000)	(11,057,000)
COMPREHENSIVE LOSS		(1,205,000)	(11,057,000)
Series E preferred stock accumulated dividends		(1,442,000)	(1,380,000)
NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS		$ (2,647,000)	$ (12,437,000)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING - Basic and Diluted	[1]	44,773,727	34,227,870
BASIC AND DILUTED LOSS PER COMMON SHARE	[1]	$ (.06)	$ (.36)

[1] All share and per share amounts of our common stock for all periods presented have been retroactively adjusted to reflect the one-for-seven reverse stock split of our issued and outstanding common stock, which took effect on July 10, 2017 (Note 1).