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
Mar. 31, 2019
Dec. 31, 2018
Accrued Liabilities and Other Liabilities [Abstract]    
Salaries, benefits and related expenses $ 2,458 $ 2,446
Device warranty 289 307
Clinical trials 273 227
Severance 116 270
Financing lease liability 36 35
Other 114 256
Total $ 3,286 $ 3,541