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ACCRUED LIABILITIES (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Accrued short term liabilities    
Accrued milestone payments $ 750 $ 1,475
Accrued clinical costs 873 63
Accrued compensation and board fees 1,633 1,144
Accrued rent   44
Accrued manufacturing costs 687  
Other 272 525
Total $ 4,215 $ 3,251