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Accrued expenses and other current liabilities, other non-current expenses
6 Months Ended
Jun. 30, 2019
Accrued expenses and other current liabilities, other non-current expenses

6             Accrued expenses and other current liabilities

Accrued expenses and other current liabilities include the following items:

June 30, 

December 31,

    

2019

    

2018

(in thousands)

Accruals for services provided by vendors-not yet billed

$

2,933

$

1,999

Personnel related accruals and liabilities

4,433

5,688

Derivative financial liability warrants

545

Total

$

7,366

$

8,232