Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities - Schedule of Accrued Liabilities (Details)

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Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Accrued Liabilities and Other Liabilities [Abstract]    
Salaries, benefits and related expenses $ 2,275 $ 2,850
Severance 488 0
Device warranty 300 232
Clinical trials 214 136
Device maintenance 78 121
Capital lease obligation 35 34
Other 79 130
Total $ 3,469 $ 3,503