Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Schedule of Changes in Aggregate Product Warranty Liabilities (Details)

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Commitments and Contingencies - Schedule of Changes in Aggregate Product Warranty Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]    
Product warranty liability at beginning of period $ 809 $ 447
Accruals for warranties issued 814 533
Adjustments related to preexisting warranties (including changes in estimates) 296 322
Settlements made (in cash or in kind) (747) (493)
Product warranty liability at end of period $ 1,172 $ 809