Note 5 - Noncontrolling Interests (Detail) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	1 Months Ended						0 Months Ended				0 Months Ended		1 Months Ended		0 Months Ended		1 Months Ended
	Oct. 04, 2011 Panacela [Member] Rusnano [Member] USD ($)	May 31, 2012 Panacela [Member] Rusnano [Member] USD ($)	May 31, 2012 Panacela [Member] Bioprocess Capital Ventures [Member] RUB	May 31, 2012 Bioprocess Capital Ventures [Member] Increased To [Member]	Jan. 20, 2011 Bioprocess Capital Ventures [Member] Minimum [Member]	Mar. 14, 2011 Bioprocess Capital Ventures [Member] Maximum [Member]	May 31, 2012 CBLI [Member] Decreased To [Member]	Oct. 04, 2011 CBLI [Member] USD ($)	Sep. 19, 2011 CBLI [Member]	Mar. 14, 2011 Incuron [Member] Minimum [Member] CBLI [Member]	Jan. 20, 2011 Incuron [Member] Maximum [Member] CBLI [Member]	Mar. 14, 2011 Incuron [Member] Bioprocess Capital Ventures [Member] USD ($)	Mar. 14, 2011 Incuron [Member] Bioprocess Capital Ventures [Member] RUB	Jan. 20, 2011 Incuron [Member] Bioprocess Capital Ventures [Member] USD ($)	Jan. 20, 2011 Incuron [Member] Bioprocess Capital Ventures [Member] RUB	Oct. 04, 2011 Rusnano [Member] USD ($)	Sep. 19, 2011 Panacela [Member] USD ($)	Sep. 19, 2011 Minimum [Member]	Sep. 19, 2011 Maximum [Member]
Payments to Acquire Additional Interest in Subsidiaries (in Rubles)		$ 5.90	194.00									$ 0.10	1.73	$ 2.30	68.00	$ 17.00
Payments to Acquire Additional Interest in Subsidiaries (in Dollars)		5.90	194.00									0.10	1.73	2.30	68.00	17.00
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners				40.80%	16.10%	24.20%			54.60%
Equity Method Investment, Ownership Percentage							59.20%			75.80%	83.90%
Payments to Acquire Interest in Subsidiaries and Affiliates (in Dollars)	$ 9.0							$ 3.0
Preferred Stock, Redemption Price Per Share (in Dollars per share)																	$ 1,057
Exercisable Price Percentage																		20.00%	40.00%