Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses and other accrued liabilities (Details)

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Accrued Expenses and other accrued liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Payables and Accruals [Abstract]    
Accrued payroll $ 437 $ 250
Accrued clinical testing 0 320
Accrued license fees and SRA 188 260
Accrued legal and professional fees 75 50
Accrued other 66 22
Total accrued expenses and other liabilities $ 766 $ 902