Note 7 - Accrued Expenses (Details) - Accrued Expenses (USD $)	Dec. 31, 2013	Dec. 31, 2012
Accrued Expenses [Abstract]
Payroll and benefits	$ 2,728,616	$ 2,477,833
Professional fees	383,231	642,853
Clinical trial costs	882,651	102,414
Research grants	610,498	844,803
Restructuring costs	24,638	933,732
Other	908,247	835,409
Total	$ 5,537,881	$ 5,837,044

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details