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Fair Value - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Liabilities
Liability, fair value		$ 3,447,000
Fair Value, Measurements, Recurring [Member]
Liabilities
Liability, fair value	$ 0
Fair Value, Measurements, Recurring [Member] | Convertible Notes [Member]
Liabilities
Liability, fair value		3,447,000
Level 2 [Member]
Liabilities
Liability, fair value		3,447,000
Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Convertible Notes [Member]
Liabilities
Liability, fair value		$ 3,447,000

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- Definition

Fair value of financial and nonfinancial obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- References

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