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Engineering Development	12 Months Ended
Dec. 31, 2011
Engineering Development
Engineering Development	14. Engineering Development Engineering development expense was $187,000 and $670,000 for the years ended 2011 and 2010, respectively, which are included in General and administrative expenses in the Consolidated Statements of Operations. The 2010 engineering development expense included a $456,000 charge to write-off engineering software in the second quarter of 2010.

Engineering Development

12 Months Ended

Dec. 31, 2011

14. Engineering Development

Engineering development expense was $187,000 and $670,000 for the years ended 2011 and 2010, respectively, which are included in General and administrative expenses in the Consolidated Statements of Operations. The 2010 engineering development expense included a $456,000 charge to write-off engineering software in the second quarter of 2010.