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NOTE, WARRANT, & COMMON STOCK PURCHASE AGREEMENT (Details Textual) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Jun. 12, 2014 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Oct. 31, 2014
Note, Warrant And Common Stock Purchase Agreement [Line Items] |  |  |  |  |
Common Stock, Shares, Issued |  | 5,710,000 | 5,468,000 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  | $ 2.20 | $ 2.20 |
Proceeds from Issuance of Private Placement | $ 1,600,000 |  |  |  |
Gain (Loss) on Extinguishment of Debt |  | $ 0 | $ (108,000) | $ 0 |
Class of Warrant or Right, Exercised |  | 100,000 | 100,000 |  |
Class of Warrant or Right, Outstanding |  | 0 | 100,000 |  |
Notes Payable [Member] |  |  |  |  |
Note, Warrant And Common Stock Purchase Agreement [Line Items] |  |  |  |  |
Warrants Not Settleable in Cash, Fair Value Disclosure |  |  | $ 145,000 |  |
Gain (Loss) on Extinguishment of Debt |  |  | 108,000 |  |
Debt Instrument, Unamortized Discount |  |  | 80,000 |  |
Deferred Fees From Issuance Of Note |  |  | $ 28,000 |  |
Private Placement [Member] |  |  |  |  |
Note, Warrant And Common Stock Purchase Agreement [Line Items] |  |  |  |  |
Sale of Stock, Number of Shares Issued in Transaction |  | 100,000 |  |  |
Proceeds from Issuance of Private Placement |  | $ 220,000 |  |  |
Common Stock, Value, Subscriptions |  | 1,220,000 |  |  |
Note and Warrant Purchase Agreement [Member] |  |  |  |  |
Note, Warrant And Common Stock Purchase Agreement [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  | $ 1,000,000 |  |  | $ 1,000,000
Common Stock, Shares, Issued |  | 200,000 |  |  | 200,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 15.00%
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  |  | $ 2.20
Mevion Medical Systems Inc [Member] |  |  |  |  |
Note, Warrant And Common Stock Purchase Agreement [Line Items] |  |  |  |  |
Cash Payments |  | $ 1,000,000 |  |  |

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