Subsequent Events	3 Months Ended
Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 17. Subsequent Events Resignation of Davis Zhang On April 17, 2015, Davis Zhang notified us of his decision to resign as our President, China Operations. His resignation will be effective as of May 15, 2015. Gallium arsenide materials were placed on a revised list of hazardous substances requiring a permit for use in manufacturing. We do not yet have that permit. From time to time, the Chinese government issues new regulations, which may require additional actions on our part to comply. On February 27, 2015, the China State Administration of Work Safety updated its list of hazardous substances. The previous list, which was published in 2002, did not restrict the materials that we use in our wafers. The new list added gallium arsenide. As a result of the newly published list, we were required to obtain a permit by May 1, 2015 to continue to manufacture our gallium arsenide substrate wafers. We initiated discussions with the local district agency to obtain the requisite permit. On May 4, 2015, we were instructed by the local district agency that because we had not yet received the requisite permit, we should cease manufacturing our gallium arsenide substrate wafers or we should obtain permission to continue manufacturing our gallium arsenide substrate wafers from a municipal-level office, such as the Beijing municipal authority. The Beijing municipal authority accepted our application on May 7, 2015 and our application is under review. We expect to continue to manufacture gallium arsenide substrate wafers while going through the compliance examination process to receive the requisite permit. If we do not receive the requisite permit to continue to manufacture gallium arsenide substrate wafers, we may be required to cease manufacturing such wafers until we receive the requisite permit. A halt to our production of gallium arsenide substrate wafers could have a material adverse effect on our revenue and profits and could also result in our furloughing approximately several hundred manufacturing employees. See the section entitled “Risk Factors” for additional information about these risks and uncertainties.

Note 17. Subsequent Events

Resignation of Davis Zhang

On April 17, 2015, Davis Zhang notified us of his decision to resign as our President, China Operations. His resignation will be effective as of May 15, 2015.

Gallium arsenide materials were placed on a revised list of hazardous substances requiring a permit for use in manufacturing. We do not yet have that permit.

From time to time, the Chinese government issues new regulations, which may require additional actions on our part to comply. On February 27, 2015, the China State Administration of Work Safety updated its list of hazardous substances. The previous list, which was published in 2002, did not restrict the materials that we use in our wafers. The new list added gallium arsenide. As a result of the newly published list, we were required to obtain a permit by May 1, 2015 to continue to manufacture our gallium arsenide substrate wafers. We initiated discussions with the local district agency to obtain the requisite permit. On May 4, 2015, we were instructed by the local district agency that because we had not yet received the requisite permit, we should cease manufacturing our gallium arsenide substrate wafers or we should obtain permission to continue manufacturing our gallium arsenide substrate wafers from a municipal-level office, such as the Beijing municipal authority. The Beijing municipal authority accepted our application on May 7, 2015 and our application is under review. We expect to continue to manufacture gallium arsenide substrate wafers while going through the compliance examination process to receive the requisite permit. If we do not receive the requisite permit to continue to manufacture gallium arsenide substrate wafers, we may be required to cease manufacturing such wafers until we receive the requisite permit. A halt to our production of gallium arsenide substrate wafers could have a material adverse effect on our revenue and profits and could also result in our furloughing approximately several hundred manufacturing employees. See the section entitled “Risk Factors” for additional information about these risks and uncertainties.