Revenue Recognition - Information by Type (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue
Total Devices revenue	$ 4,436,642	$ 7,327,141	$ 13,523,624	$ 19,728,076
Disposables, service and other	2,802,039	2,162,602	8,269,487	6,513,030
Amortization of extended warranty agreements	460,415	473,556	1,378,218	1,385,382
Total revenue	7,699,096	9,963,299	23,171,329	27,626,488
MRI Compatible IV Infusion Pump Systems
Disaggregation of Revenue
Total Devices revenue	2,153,699	4,769,252	6,693,692	13,512,548
MRI Compatible Patient Vital Signs Monitoring Systems
Disaggregation of Revenue
Total Devices revenue	$ 2,282,943	$ 2,557,889	$ 6,829,932	$ 6,215,528

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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration