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Note 30 - Share-based Payments (Details Textual) |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 11, 2021 | Feb. 27, 2018 | Jul. 31, 2017 GBP (£) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2020
Statement Line Items [Line Items] |  |  |  |  |  |  |
Expense from cash-settled share-based payment transactions |  |  |  | $ 634,000 | $ 107,000 | $ 43,000 |
Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  | $ 1,413,000 | $ 689,000 | $ 315,000 |
Option life, share options granted |  | 3 |  |  |  |  |
Share-based compensation arrangement, percentage of outstanding stock maximum |  |  |  | 10.00% |  |  |
Weighted average remaining contractual life of outstanding share options (Year) |  |  |  | 1 year 295 days | 2 years 51 days | 3 years 51 days |
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  |  |  | $ 14,000 |
Mr. J Staiger [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Expense from equity-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  | $ 0 | 0 | $ 14,000 |
Restricted stock units (RSUs) [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  |  | 3 |  |  |
Weighted average fair value at measurement date, other equity instruments granted |  |  |  | $ 15.88 | 8.46 |  |
Performance share units (PSUs) [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  |  | 3 |  |  |
Performance probability |  |  |  |  |  | 85.00% |
Liabilities from share-based payment transactions |  |  |  | $ 2,240,000 | 524,000 | $ 2,043,000 |
Expense from cash-settled share-based payment transactions |  |  |  | 634,000 | 107,000 | 43,000 |
Value of other equity instruments exercised or vested in share-based payment arrangement, share capital |  |  |  | 216,000 |  |  |
Weighted average fair value at measurement date, other equity instruments granted |  |  |  | $ 15.51 | $ 8.19 |  |
Performance share units (PSUs) [member] | Potential ordinary share transactions [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Number of other equity instruments granted in share-based payment arrangement | 78,883 |  |  |  |  |  |
Performance share units (PSUs) [member] | Bottom of range [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Performance probability |  |  |  | 93.00% | 93.00% |  |
Performance share units (PSUs) [member] | Top of range [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Performance probability |  |  |  | 100.00% | 100.00% |  |
Cash-settled awards [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  | 3 |  |  |  |
Liabilities from share-based payment transactions |  |  |  | $ 30,000 | $ 16,000 | 47,000 |
Number of other equity instruments granted in share-based payment arrangement |  |  | 52,282 |  |  |  |
Weighted average fair value at measurement date, other equity instruments granted | £ |  |  | £ 12.05 |  |  |  |
Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  |  | $ 114,000 | $ 73,000 | $ 97,000 |
Percentage of discretionary cash bonus |  |  |  |  |  |  | 10.00%
Omnibus Equity Incetive Compensation Plan [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Option life, share options granted |  |  |  | 10 |  |  |

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