Quarterly report pursuant to Section 13 or 15(d)

8. Commitments and Contingencies (Details)

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8. Commitments and Contingencies (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]    
Balance, January 1 $ 16 $ 17
Accruals for warranties issued 13 12
Settlements made (in cash or in kind) (6) (10)
Balance, end of period $ 23 $ 19