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=109250915&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=109250915&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

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Concentrations of Credit Risk (Details)	3 Months Ended		12 Months Ended
Concentrations of Credit Risk (Details)	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018
Customer Concentration Risk [Member] \| Product sales [Member] \| Three Customers [Member]
Concentration Risk [Line Items]
Concentration risk percentage	86.00%	98.00%
Customer Concentration Risk [Member] \| Accounts receivable [Member] \| Two Customers [Member]
Concentration Risk [Line Items]
Concentration risk percentage	82.00%		87.00%
Geographic Concentration Risk [Member] \| Revenue [Member] \| Europe [Member]
Concentration Risk [Line Items]
Concentration risk percentage	19.00%	73.00%
Geographic Concentration Risk [Member] \| Revenue [Member] \| North America [Member]
Concentration Risk [Line Items]
Concentration risk percentage	81.00%	27.00%