Commitments and Contingencies - Additional Information (Detail)	1 Months Ended
	May 31, 2016
Patent One
Commitments and Contingencies [Line Items]
Patent expiration period	2020-09
Patent Two
Commitments and Contingencies [Line Items]
Patent expiration period	2020-12
Patent Three
Commitments and Contingencies [Line Items]
Patent expiration period	2021-10