v3.19.3

Summary of Significant Accounting Policies - Additional Information (Details) - segment	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments	1
Accounts Receivable | Ultravision Technology Ltd.
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	10.00%	13.00%
Accounts Receivable | BioStar Company
Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage		12.00%

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- Definition

Summary of significant accounting policies.

+ References

No definition available.

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 825
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-Paragraph 21
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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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