Revenue Disaggregation and Operating Segments - Revenue (Details) - USD ($)	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Revenue Recognition
Revenue	$ 2,789,000	$ 3,074,000
US
Revenue Recognition
Revenue	1,954,000	3,066,000
Outside US
Revenue Recognition
Revenue	835,000	8,000
LAP-BAND product
Revenue Recognition
Revenue	2,789,000	3,074,000
LAP-BAND product \| US
Revenue Recognition
Revenue	1,954,000	3,066,000
LAP-BAND product \| Outside US
Revenue Recognition
Revenue	$ 835,000	8,000
Revenues \| Geographic area \| Australia
Revenue Recognition
Revenue		$ 0
Percentage of total	10.70%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration