Subsequent Events - Additional Information (Detail) - CloudControlMedia, LLC [Member] - Subsequent Event [Member]	Apr. 15, 2019 USD ($)
Subsequent Event [Line Items]
Date of acquisition	Apr. 15, 2019
Cash paid upon closing	$ 8,300,000
Cash paid for net assets acquired	800,000
Business Combination, post-closing payments	7,500,000
Business combination, total earn-out estimated payments, low	3,100,000
Business combination, total earn-out estimated payments, high	$ 4,200,000
Business combination, deferred consideration payment period	4 years
Business combination, deferred consideration payment description	The post-closing payments are payable in equal semi-annual installments over a four year period, with the first installment payable six months following April 15, 2019 and the earn-out is calculated every June 30 and December 31 for the preceding six months, payable within 45 days from the semi-annual date.