XML 84 R61.htm IDEA: XBRL DOCUMENT
v3.20.4

Note 23 - Stock-based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Restricted Stock Unit Activity | The following table summarizes information about restricted stock unit activity for the year ended December 31, 2020:
|  | Number of Restricted Stock Units |  |  | Weighted-Average Grant Date Fair Values |
Outstanding on December 31, 2019 |  |  | 721,801 |  |  | $ | 3.25 |
Granted |  |  | 351,909 |  |  | $ | 2.91 |
Vested |  |  | 692,750 |  |  | $ | 3.05 |
Outstanding on December 31, 2020 |  |  | 380,960 |  |  | $ | 3.31 |
Stock Option Activity | The following table summarizes information about stock option activity for the year ended December 31, 2020:
|  | Shares Under Option |  |  | Weighted Average Exercise Price Per Share |  |  | Weighted Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value ($ millions) |
Outstanding on December 31, 2019 |  |  | 6,843,079 |  |  | $ | 10.96 |  |  |  |  |  |  |
Granted |  |  | 2,917,456 |  |  | $ | 5.86 |  |  |  |  |  |  |
Exercised |  |  | 2,019,187 |  |  | $ | 14.51 |  |  |  |  |  |  |
Forfeited |  |  | 16,922 |  |  | $ | 12.50 |  |  |  |  |  |  |
Outstanding on December 31, 2020 |  |  | 7,724,426 |  |  | $ | 8.10 |  |  | 4.83 |  | $ | 19.42 |
Exercisable on December 31, 2020 |  |  | 7,024,347 |  |  | $ | 8.41 |  |  | 4.69 |  | $ | 16.86 |
Expected to vest December 31, 2020 |  |  | 700,080 |  |  | $ | 4.97 |  |  | 6.24 |  | $ | 2.56 |
Valuation of Option Grants | The following inputs were used for the valuation of option grants issued in each year:
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Weighted-average fair value of options granted |  | $ | 1.50 |  |  | $ | 1.73 |
Weighted-average risk-free interest rate |  | 2.43% |  |  | 2.47% |
Expected option lives |  | 3.7 years |  |  | 4.5 years |
Weighted-average volatility |  | 98% |  |  | 90% |
Expected dividend yield |  | 0.00% |  |  | 0.00% |
The following inputs were used in the lattice-based valuation of the July 27, 2020 option grants:
|  | July 27, 2020 |
|  | Option Awards |
Weighted-average fair value of options granted |  | $ | 6.57 |
Range of risk-free interest rates |  | 0.11% - 0.30% |
Weighted-average term |  | 5.57 years |
Weighted-average volatility |  | 98% |
Weighted-average expected dividend yield |  | 0.00% |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration