Income Taxes - Schedule of Effective Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Computed “expected” tax provision (benefit)	$ 11,300		$ (2,400)
Change in income tax resulting from:
State taxes, net of federal benefit	1,900	$ 700	1,000
Change in fair value of earnout	2,700		(1,600)
Non-deductible executive compensation	1,200	400	300
Non-deductible expenses	200	200	300
Foreign income	4,100	100	200
Foreign Permanent Differences including GAAP to Statutory Differences	2,800
Foreign Non-Territorial Income	(6,900)
State tax impact of previously deferred gain from FCC auction for broadcast spectrum		(2,500)	2,700
Transaction costs	200	100
Change in valuation allowance	200	1,700
Change in state tax rate	(100)	500	400
Stock compensation	(800)	200	400
Change in unrecognized tax benefits	(300)	100	700
Impairment		200	6,300
Other	2,200	(200)	(100)
Total provision (benefit) for taxes	$ 18,679	$ 1,506	$ 8,158