Gamma Knife at NYU Medical Center (Details) - NYU [Member] - Perfexion Gamma Knife [Member] - USD ($)		6 Months Ended
Oct. 31, 2012	Jun. 30, 2019
Gamma Knives at NYU Medical Center [Abstract]
Terms of agreement with NYU		12 years
Removal cost	$ 525,000
Insurance coverage	$ 930,000

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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- Definition

Cash outflow related to disposal costs of plants, whether by demolishing, dismantling, abandoning, sale, and so forth during the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

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- Definition

Period of agreement with NYU to operate a gamma knife at their facility.

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