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COMMITMENTS AND CONTINGENCIES (Details)
Dec. 31, 2017
USD ($)
Long-term Purchase Commitment [Line Items]  
2018 $ 1,500,000
Thereafter 25,800,000
Total 27,300,000
Proton Beam Unit [Member]  
Long-term Purchase Commitment [Line Items]  
2018 0
Thereafter 25,800,000
Total 25,800,000
Gamma Knife Units [Member]  
Long-term Purchase Commitment [Line Items]  
2018 1,500,000
Thereafter 0
Total $ 1,500,000