Note 1 - Description of the Business and Summary of Significant Accounting Policies - Property and Equipment Useful Life (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2021 | |
| Minimum [Member] | |
| Gaming equipment (in years) (Year) | 1 year |
| Maximum [Member] | |
| Gaming equipment (in years) (Year) | 6 years |
| Gaming Equipment [Member] | Minimum [Member] | |
| Gaming equipment (in years) (Year) | 1 year |
| Gaming Equipment [Member] | Maximum [Member] | |
| Gaming equipment (in years) (Year) | 5 years |
| Property, Plant and Equipment, Other Types [Member] | Minimum [Member] | |
| Gaming equipment (in years) (Year) | 3 years |
| Property, Plant and Equipment, Other Types [Member] | Maximum [Member] | |
| Gaming equipment (in years) (Year) | 6 years |