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Note 11 - Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Compensation and related expenses $ 3,633 $ 2,893
Clinical trial costs 867 2,318
Accrued liabilities related to product recall 1,181
Research grants 408 419
Professional fees 1,213 448
Deferred income 74
Other 83 248
Total $ 7,459 $ 6,326