Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Liabilities (Detail)

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Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Liabilities (Detail)
9 Months Ended
Sep. 30, 2017
USD ($)
Fair Value Disclosures [Abstract]  
Liability Assumed as part of Arrangement $ 114,000
Unrealized Gain on warrants (111,000)
Warrant liability, Ending Balance $ 3,000