Business Combination - Summary of Merger Consideration Paid to DTH Stockholders (except for the Levy Newco Parties) (Detail) - USD ($) $ / shares in Units, $ in Thousands	Aug. 08, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Cash consideration paid		$ 95,000
Less: Transaction expenses paid by the Company		(10,200)
Total purchase price		$ 120,000
Merger consideration Per share		$ 38.84
Issuance of common stock (in shares)	1,533,542
DTH
Business Acquisition [Line Items]
Cash consideration paid		$ 105,164
Value of share consideration issued		69,305
Fair value of equity interests acquired in Step		120,000
Less: Transaction expenses paid by the Company		(10,164)
Total purchase price		$ 284,305
Issuance of common stock (in shares)		4,553,540
Value per share as of June 30, 2015		$ 15.22