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Patents
 6 Months Ended
Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Patents

3. Patents

The Company performs an intangible asset impairment analysis at least annually or whenever circumstances or events indicate such assets might be impaired. The Company would recognize an impairment charge in the event the net book value of such assets exceeded the future undiscounted cash flows attributable to such assets.

Management completed an analysis of the Company's patents as of December 31, 2014. Based on that analysis, the Company concluded that no impairment of the carrying value of the patents existed. The Company believes that no events or circumstances changed during the three and six months ended June 30, 2015 that would impact this conclusion.

Amortization of patent costs was $86 and $173 for the three and six-month periods ended June 30, 2015 and $89 and $180 for the three and six-month periods ended June 30, 2014, respectively.

The following table summarizes the patents:

Amortizable intangible assets:June 30, 2015December 31, 2014
Carrying
Amount		Accumulated
Amortization		Net ValueCarrying
Amount		Accumulative
Amortization		Net Value
Patents
$
6,745
$
(5,985)
$
760
$
6,745
$
(5,812)
$
933