Goodwill and other intangible assets - Additional information (Detail) |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2020
USD ($)
states
|
Dec. 31, 2019
USD ($)
states
|
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||
| Other Intangible Assets, Net | $ 3,000,000 | $ 3,000,000 |
| Number of states With Licenses | states | 45 | 45 |
| Goodwill | $ 1,243,000 | $ 1,243,000 |
| Goodwill and Intangible Asset Impairment | $ 0 | $ 0 |