Note 11 - Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Compensation and related expenses	$ 2,844	$ 2,893
Clinical trial costs	2,402	2,318
Revenue reserves and accrued expenses related to product recall	1,381
Research grants	431	419
Professional fees	676	448
Other	229	248
Total	$ 7,963	$ 6,326

Represents accrued clinical trial costs current.

No definition available.

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- Definition

Represents accrued research grants current.

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No definition available.

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- Definition

Amount of expenses incurred but not yet paid for the voluntary recall, due within one year or the normal operating cycle, if longer.

+ References

No definition available.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. 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 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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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. 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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Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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