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Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In May 2017, we announced an additional workforce reduction as part of a cost rationalization program involving both layoffs and actual and scheduled attrition. Together with our workforce reduction and attrition announced in February 2017, the combined reduction is expected to be approximately 27% of total headcount as of December 31, 2016. We estimate that the reduction in force will result in a second quarter 2017 charge of approximately $3.5 million.