Note 11 - Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Compensation and related expenses	$ 2,563	$ 4,446
Professional fees	1,810	1,989
Research grants	392	400
Clinical trial costs	419	577
Income taxes payable	1,296	385
Lease liability - current	1,075
Other	476	349
Total	$ 8,031	$ 8,146

Represents accrued clinical trial costs current.

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Represents accrued research grants current.

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No definition available.

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- Definition

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

+ References

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-SubTopic 210
-Section S99
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Amount of expenses incurred but not yet paid nor invoiced, and liabilities classified as other.

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No definition available.

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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).

+ References

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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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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