Long-Term Debt	12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt French government agencies provide financing to French companies for R&D. At December 31, 2017 and 2016, the Company had outstanding loans of $267 and $815, respectively for various programs. These loans do not bear interest and are repayable only in the event the research project is technically or commercially successful. Potential repayment is scheduled to occur through 2019. During the years ended December 31, 2017, 2016 and 2015, the Company repaid $115, $277 and $747, of loans associated with specific research projects, respectively. In addition, during 2017 and 2015 the Company received waivers of repayment for the remaining portion of certain loans of $539 and $1,498, respectively, on the basis of limited commercial and technical success. Amounts waived are reported as reductions to R&D expenses in the Company’s consolidated statements of income (loss). No such waivers were received during 2016.

Long-Term Debt

French government agencies provide financing to French companies for R&D. At December 31, 2017 and 2016, the Company had outstanding loans of $267 and $815, respectively for various programs. These loans do not bear interest and are repayable only in the event the research project is technically or commercially successful. Potential repayment is scheduled to occur through 2019.

During the years ended December 31, 2017, 2016 and 2015, the Company repaid $115, $277 and $747, of loans associated with specific research projects, respectively. In addition, during 2017 and 2015 the Company received waivers of repayment for the remaining portion of certain loans of $539 and $1,498, respectively, on the basis of limited commercial and technical success. Amounts waived are reported as reductions to R&D expenses in the Company’s consolidated statements of income (loss). No such waivers were received during 2016.