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COMMITMENTS AND CONTINGENCIES (Details Textual) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 14, 2016 | Jan. 31, 2016 | Dec. 31, 2015
Commitments And Contingencies [Line Items] |  |  |
Long-term Purchase Commitment, Due, Description |  |  | Approximately $25,800,000 of these commitments are not expected to start becoming due until 2017 or later and the Company is in discussions with lenders to finance the remaining two proton systems.
Gamma Knife Perfexion System [Member] |  |  |
Commitments And Contingencies [Line Items] |  |  |
Long-term Purchase Commitment, Amount |  |  | $ 3,650,000
Other Commitment, Due in Next Twelve Months |  |  | 600,000
Mevion Medical Systems Inc [Member] |  |  |
Commitments And Contingencies [Line Items] |  |  |
Long-term Purchase Commitment, Amount |  |  | 34,200,000
Long-term Purchase Commitment, Deposits for Future Purchase |  |  | $ 5,000,000
Subsequent Event [Member] | Mevion Medical Systems Inc [Member] |  |  |
Commitments And Contingencies [Line Items] |  |  |
Repayments of Debt and Capital Lease Obligations |  | $ 6,700,000 |
Reimburse of Progress Payment to Related Party |  | 1,100,000 |
Additional Payment to Related Party | $ 600,000 |  |
Debt and Capital Lease Obligations | $ 8,400,000 | 8,400,000 |
Subsequent Event [Member] | Mevion Medical Systems Inc [Member] | First PBRT System [Member] |  |  |
Commitments And Contingencies [Line Items] |  |  |
Debt and Capital Lease Obligations |  | $ 6,700,000 |

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- Definition Minimum amount of other commitment maturing in the next fiscal year following the latest fiscal year for commitments not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in this taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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