Basis of Presentation (Details Textual) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 29, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Aug. 04, 2017
Basis Of Presentation [Line Items]
Gain (Loss) on Extinguishment of Debt		$ 0	$ 0	$ 0	$ (108,000)
Warrants Issued With cashless exercise during period				25,000
Class of Warrant or Right, Outstanding						100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 2.20
Common Stock [Member]
Basis Of Presentation [Line Items]
Stock Issued During Period, Shares, Warrants Exercised						100,000
Notes Payable [Member]
Basis Of Presentation [Line Items]
Gain (Loss) on Extinguishment of Debt						$ 108,000
Warrants Not Settleable in Cash, Fair Value Disclosure						145,000
Debt Instrument, Unamortized Discount						80,000
Deferred Fees From Issuance Of Note						$ 28,000
Warrants Issued With cashless exercise during period				50,000
OR21 LLC [Member]
Basis Of Presentation [Line Items]
Equity Method Investment, Ownership Percentage		50.00%		50.00%
Architectural Design Company [Member]
Basis Of Presentation [Line Items]
Equity Method Investment, Ownership Percentage		50.00%		50.00%
Mevion Medical Systems Inc [Member]
Basis Of Presentation [Line Items]
Repayments of Notes Payable	$ 1,000,000
Mevion Medical Systems Inc [Member] | Subsequent Event [Member]
Basis Of Presentation [Line Items]
Prepaid Contract Expenses							$ 1,000,000