Revenue - Information by Type (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue
Total Devices Revenue	$ 27,761,639	$ 21,192,616	$ 15,470,385
Disposables, services and other	8,914,822	7,728,624	6,613,999
Amortization of extended warranty agreements	1,840,680	1,517,743	997,208
Total revenue	38,517,141	30,438,983	23,081,592
MRI Compatible IV Infusion Pump Systems
Disaggregation of Revenue
Total Devices Revenue	18,052,406	14,536,998	13,621,769
MRI Compatible Patient Vital Signs Monitoring Systems
Disaggregation of Revenue
Total Devices Revenue	$ 9,709,233	$ 6,655,618	$ 1,848,616

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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