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Related Party Transactions - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Apr. 30, 2016	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Change in fair value of derivative financial instruments		$ 2,525,000	$ (516,000)
Non-employee Stock Options
Related Party Transaction [Line Items]
Change in fair value of derivative financial instruments		200,000	(48,000)
Minimum | A&B (HK) Company Ltd.
Related Party Transaction [Line Items]
Ownership percentage of common stock shares outstanding				5.00%
Directors
Related Party Transaction [Line Items]
Consulting fees paid		$ 3,000	18,000
Montel Media, Inc. | Minimum
Related Party Transaction [Line Items]
Beneficially owns common stock percentage		5.00%
Montel Media, Inc. | Consulting Agreement
Related Party Transaction [Line Items]
Consulting fees paid		$ 45,000	45,000
Consulting monthly fee	$ 15,000
Clinvue LLC
Related Party Transaction [Line Items]
Consulting fees paid		$ 100,000	$ 0
CEO | Minimum
Related Party Transaction [Line Items]
Ownership percentage of common stock shares outstanding				5.00%
CFO/CEO | Minimum
Related Party Transaction [Line Items]
Ownership percentage of common stock shares outstanding				5.00%
Director 1 | Minimum
Related Party Transaction [Line Items]
Ownership percentage of common stock shares outstanding				5.00%
Director 2 | Minimum
Related Party Transaction [Line Items]
Ownership percentage of common stock shares outstanding				5.00%

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 225
-Section S99
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-Subparagraph (SX 210.6-07.2(a),(b),(c),(d))
-URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999

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