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Note 1 - Principles of Consolidation and Basis of Presentation (Detail) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2012
Equity Method Investment, Ownership Percentage	6.00%
Investment Owned, Balance, Shares	1,266,706
Equity Method Investment, Quoted Market Value (in Dollars)	$ 0.8
iBio, Inc. [Member]
Share Price (in Dollars per share)	$ 0.88
Contingently Issuable Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	634,500

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

Balance held at close of period in number of shares.

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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