Note 9 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
---|---|---|---|
Jun. 30, 2021 |
Mar. 31, 2021 |
Dec. 31, 2020 |
|
Deferred Compensation Liability, Current and Noncurrent, Total | $ 2.0 | ||
Supplemental Unemployment Benefits, Severance Benefits | 0.6 | ||
Employee and Severance Agreement, Maximum Aggregate Exposure | 0.9 | ||
Employee Severance [Member] | |||
Restructuring Charges, Total | 0.8 | ||
Payments for Postemployment Benefits | $ 0.4 | ||
Employee Severance [Member] | Forecast [Member] | |||
Payments for Postemployment Benefits | $ 0.4 | ||
Minimum [Member] | |||
Long-term Incentive Plan, Bonus Pool Percent | 0.20% | 1.00% | |
Maximum [Member] | |||
Long-term Incentive Plan, Bonus Pool Percent | 1.30% | ||
Private Equity Funds [Member] | |||
Guarantor Obligations, Current Carrying Value | $ 3.8 |