Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities - Product Maintenance and Warranty (Details)

v3.10.0.1
Accrued Liabilities - Product Maintenance and Warranty (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2018
USD ($)
Accrued Liabilities, Rollforward [Roll Forward]  
Beginning Balance $ 353
Additions for estimated future expense 312
Incurred costs (287)
Closing Balance 378
Maintenance  
Accrued Liabilities, Rollforward [Roll Forward]  
Beginning Balance 121
Additions for estimated future expense 0
Incurred costs (43)
Closing Balance 78
Warranty  
Accrued Liabilities, Rollforward [Roll Forward]  
Beginning Balance 232
Additions for estimated future expense 312
Incurred costs (244)
Closing Balance $ 300