Quarterly report pursuant to Section 13 or 15(d)

8. Commitments and Contingencies (Tables)

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8. Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule of reconciliation of changes in product warranty liabilities
(Dollars in thousands)  

Nine Months Ended

September 30,

    2016   2015  
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