Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2019	Jul. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Contingencies, settlement agreement, terms	In January 2017, the SEC approved the Company’s offers of settlement in connection with the SEC’s investigations of accounting matters leading to the Company’s prior restatement of financial statements and the Company’s review of improper payments with respect to its subsidiary in Brazil. The settlements approved by the SEC resolved these two matters, and included payments totaling $14.4 million to the SEC of amounts previously accrued and funded into escrow during 2016. In addition, in 2017, the Company received a favorable insurance settlement of approximately $6 million associated with prior costs incurred related to these matters, which was recognized within general and administrative expenses.
Payments for SEC settlements				$ 14.4
Insurance settlements received			$ 6.0
Discontinued operations obligated to make final payment to insurer	$ 1.7
Accrued other long-term liabilities	4.9
Estimated sales and marketing expense	1.3	$ 1.0	$ 0.9
Freezing amount in cash resulted from court pending legal action issued		$ 2.6			$ 0.7	$ 2.5
Accruals related court pending legal dispute	$ 1.7