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Related Parties - Additional Information (Detail) - Cirius Therapeutics, Inc., [Member] - USD ($)
3 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Related Party Transaction [Line Items]    
Amount of transactions with related party for providing services   $ 203,000
Revenue recognized from related parties agreement   $ 42,000
Scenario, Forecast [Member]    
Related Party Transaction [Line Items]    
Amount of transactions with related party for providing services $ 23,000