Investment in CPAC	12 Months Ended
Jun. 30, 2013
Investment in CPAC
Investment in CPAC	7. Investment in CPAC In April 2008, TomoTherapy established a new affiliate, CPAC, to develop a compact proton therapy system for the treatment of cancer. From the formation of CPAC through December 2012, the Company and TomoTherapy contributed both cash and intellectual property to CPAC, resulting in a combined equity interest of approximately 15.4% of the outstanding stock of CPAC and approximately 16.3% on a fully diluted basis. The Company determined that CPAC was a variable interest entity or VIE, as CPAC depended on the Company, TomoTherapy and other investors to fund its operations. Under the accounting standards for consolidating variable interest entities, the consolidating investor is the entity with the power to direct the activities of the venture that most significantly impact the venture's economic performance and with the obligation to absorb losses or the right to receive benefits from the venture that could potentially be significant to the venture. Although the Company and its subsidiary held less than a 50% ownership interest in CPAC, it was determined that the Company met these two characteristics, and therefore, was the primary beneficiary of CPAC. The Company consolidated the results of operations of CPAC from June 10, 2011 (the date the Company acquired TomoTherapy) to December 21, 2012. On December 21, 2012, the Company and CPAC entered into a Purchase Agreement and Release, or Purchase Agreement, which provided for all the equity and debt investments held by the Company in CPAC to be purchased by CPAC for a nominal consideration. In addition, the Company assigned all its rights to the Dielectric Wall Accelerator, or DWA technology licensed from Lawrence Livermore National Security, LLC to CPAC. As a result of the Purchase Agreement, the Company concluded that it was no longer the primary beneficiary of CPAC since it did not have any variable interest in CPAC. In the second quarter of fiscal 2013, the Company deconsolidated CPAC and recorded a loss of $3.4 million, resulting from the write-down of the carrying value of CPAC's net liabilities, the write-off of receivables from CPAC and the non-controlling interest in CPAC, net of cash consideration received. The results of operations of CPAC, including the loss on deconsolidation of CPAC and the losses attributable to the non-controlling interest recorded for the years ended June 30, 2013, 2012 and 2011 have been presented as discontinued operations in the consolidated statements of operations and comprehensive loss. The results of operations of CPAC during the years ended June 30, 2013, 2012 and 2011 comprised of research and development expenses of $2.8 million, $5.8 million and $0.4 million, respectively, general and administrative expenses of $0.6 million, $0.9 million and $0.1 million, respectively and other expense, net of $0.1 million, $0.4 million and nil, respectively.

7. Investment in CPAC

In April 2008, TomoTherapy established a new affiliate, CPAC, to develop a compact proton therapy system for the treatment of cancer. From the formation of CPAC through December 2012, the Company and TomoTherapy contributed both cash and intellectual property to CPAC, resulting in a combined equity interest of approximately 15.4% of the outstanding stock of CPAC and approximately 16.3% on a fully diluted basis. The Company determined that CPAC was a variable interest entity or VIE, as CPAC depended on the Company, TomoTherapy and other investors to fund its operations. Under the accounting standards for consolidating variable interest entities, the consolidating investor is the entity with the power to direct the activities of the venture that most significantly impact the venture's economic performance and with the obligation to absorb losses or the right to receive benefits from the venture that could potentially be significant to the venture. Although the Company and its subsidiary held less than a 50% ownership interest in CPAC, it was determined that the Company met these two characteristics, and therefore, was the primary beneficiary of CPAC. The Company consolidated the results of operations of CPAC from June 10, 2011 (the date the Company acquired TomoTherapy) to December 21, 2012.

On December 21, 2012, the Company and CPAC entered into a Purchase Agreement and Release, or Purchase Agreement, which provided for all the equity and debt investments held by the Company in CPAC to be purchased by CPAC for a nominal consideration. In addition, the Company assigned all its rights to the Dielectric Wall Accelerator, or DWA technology licensed from Lawrence Livermore National Security, LLC to CPAC. As a result of the Purchase Agreement, the Company concluded that it was no longer the primary beneficiary of CPAC since it did not have any variable interest in CPAC. In the second quarter of fiscal 2013, the Company deconsolidated CPAC and recorded a loss of $3.4 million, resulting from the write-down of the carrying value of CPAC's net liabilities, the write-off of receivables from CPAC and the non-controlling interest in CPAC, net of cash consideration received. The results of operations of CPAC, including the loss on deconsolidation of CPAC and the losses attributable to the non-controlling interest recorded for the years ended June 30, 2013, 2012 and 2011 have been presented as discontinued operations in the consolidated statements of operations and comprehensive loss. The results of operations of CPAC during the years ended June 30, 2013, 2012 and 2011 comprised of research and development expenses of $2.8 million, $5.8 million and $0.4 million, respectively, general and administrative expenses of $0.6 million, $0.9 million and $0.1 million, respectively and other expense, net of $0.1 million, $0.4 million and nil, respectively.