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Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2018
Payables and Accruals [Abstract]  
Schedule of Accrued Current Liabilities
Accrued current liabilities consisted of the following (in thousands):
 
 
At December 31,
 
2018
 
2017
 
 
 
 
Accrued payroll and related benefits
$
435

 
$
394

Accrued sales commissions and incentives
115

 
124

Accrued warranty expense
258

 
174

Accrued severance and related benefits
188

 

Accrued restructuring - short-term
156

 
170

Accrued legal and professional fees
160

 
77

Accrued other expenses
73

 
53

Total accrued liabilities
$
1,385

 
$
992