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Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021 USD ($) Title	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) Title	Dec. 31, 2019 USD ($)	Dec. 31, 2018
International Gaming Technologies [Member]
Percentage of royalty on revenue					10.00%
Long-term purchase commitment, period	10 years		10 years
Cost of revenue | $	$ 3.0	$ 3.0	$ 13.5	$ 11.5
DoubleU Games License Agreement [Member]
Number of titled games | Title	38		32
Maximum [Member] | International Gaming Technologies [Member]
Percentage of royalty on revenue	15.00%		15.00%
Minimum [Member] | International Gaming Technologies [Member]
Percentage of royalty on revenue	7.50%		7.50%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612

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-Name Accounting Standards Codification
-Topic 235
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

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-Topic 220
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