Note 9 - Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Compensation and related expenses	$ 3,212	$ 5,830
Professional fees	3,052	3,850
Operating lease liability - current	1,476	1,141
Clinical trial costs	1,113	788
Current portion of acquisition related contingent consideration (Note 4)	11,688	0
Finance lease liability - current	186	0
Other	1,018	836
Total	$ 21,745	$ 12,445

Represents accrued clinical trial costs current.

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Amount of expenses incurred but not yet paid nor invoiced, and liabilities classified as other.

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

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