Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities

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Accrued Liabilities
 3 Months Ended
Mar. 31, 2020
Accrued Liabilities and Other Liabilities [Abstract]  
Accrued Liabilities Accrued Liabilities
 
Accrued liabilities consisted of the following:
March 31, 2020 December 31, 2019
Salaries, benefits and related expenses $ 1,275    $ 1,098   
Device warranty 220    285   
Other 221    300   
Total $ 1,716    $ 1,683   
 
The current portion of the warranty liability is classified as a component of accrued liabilities, while the long-term portion of the warranty liability is classified as a component of other non-current liabilities in the condensed consolidated balance sheets. A reconciliation of the changes in the device warranty liability for the three months ended March 31, 2020 is as follows:
  March 31, 2020
Balance at beginning of period $ 350   
Additions for estimated future expense 18   
Incurred costs (109)  
Balance at end of period $ 259   
Current portion $ 220   
Long-term portion 39   
Total $ 259