Distribution Agreement	12 Months Ended
Dec. 31, 2022
Related Party Transactions [Abstract]
Distribution Agreement	Distribution AgreementIn December 2014, the Company entered into a distribution agreement with Itochu Corporation, or Itochu, a Japanese entity, pursuant to which the Company appointed Itochu as its exclusive distributor for the sale and delivery of its MRIdian products within Japan. The exclusive distribution agreement has an initial term of 10 years from December 2014, and contains features customary in such distribution agreements. Under this distribution agreement, the Company will supply its products and services to Itochu based upon the Company’s then-current pricing. In consideration of the exclusive distribution rights granted, Itochu agreed to pay a distribution fee of $4.0 million in three installments: (i) the first installment of $1.0 million was due upon execution of the distribution agreement; (ii) the second installment of $1.0 million was due within 10 business days following submission of the application for regulatory approval of the Company’s product to the Japan regulatory authority; and (iii) the final installment of $2.0 million was due within 10 business days following receipt of approval for the Company’s product from the Japanese Ministry of Health, Labor and Welfare. The first and second installments of $2.0 million in aggregate were received in December 2014 and December 2015, respectively. In August 2016, the Company received the third and final $2.0 million installment upon the receipt of regulatory approval to market MRIdian in Japan. The entire $4.0 million distribution fee received was reclassified to deferred revenue as it was no longer refundable. In August 2016, the Company started recognizing distribution rights revenue ratably over the remaining term of the exclusive distribution agreement of approximately 8.5 years. The distribution rights revenue was $0.5 million for each of the years ended December 31, 2022, 2021 and 2020.

Distribution Agreement

12 Months Ended

Dec. 31, 2022

Distribution AgreementIn December 2014, the Company entered into a distribution agreement with Itochu Corporation, or Itochu, a Japanese entity, pursuant to which the Company appointed Itochu as its exclusive distributor for the sale and delivery of its MRIdian products within Japan. The exclusive distribution agreement has an initial term of 10 years from December 2014, and contains features customary in such distribution agreements. Under this distribution agreement, the Company will supply its products and services to Itochu based upon the Company’s then-current pricing. In consideration of the exclusive distribution rights granted, Itochu agreed to pay a distribution fee of $4.0 million in three installments: (i) the first installment of $1.0 million was due upon execution of the distribution agreement; (ii) the second installment of $1.0 million was due within 10 business days following submission of the application for regulatory approval of the Company’s product to the Japan regulatory authority; and (iii) the final installment of $2.0 million was due within 10 business days following receipt of approval for the Company’s product from the Japanese Ministry of Health, Labor and Welfare. The first and second installments of $2.0 million in aggregate were received in December 2014 and December 2015, respectively. In August 2016, the Company received the third and final $2.0 million installment upon the receipt of regulatory approval to market MRIdian in Japan. The entire $4.0 million distribution fee received was reclassified to deferred revenue as it was no longer refundable. In August 2016, the Company started recognizing distribution rights revenue ratably over the remaining term of the exclusive distribution agreement of approximately 8.5 years. The distribution rights revenue was $0.5 million for each of the years ended December 31, 2022, 2021 and 2020.