XML 38 R27.htm IDEA: XBRL DOCUMENT
v3.23.3

Note 7 - Stock-based Compensation (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2023
Notes Tables |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
|  | Shares Available for Grant |  |  | Number of Shares Outstanding |  |  | Weighted-Average Exercise Price |
Balance as of December 31, 2022 |  |  | 65 | * |  |  | 4,694 |  |  | $ | 4.63 |
Authorized |  |  | 1,644 |  |  |  | - |  |  |  | - |
Options Granted |  |  | (1,278 | ) |  |  | 1,278 |  |  |  | 3.60 |
RSAs Granted |  |  | (244 | ) |  |  | - |  |  |  | - |
Exercised |  |  | - |  |  |  | (141 | ) |  |  | 1.63 |
Forfeited/expired |  |  | 221 |  |  |  | (221 | ) |  |  | 5.58 |
Balance as of September 30, 2023 |  |  | 408 |  |  |  | 5,610 |  |  | $ | 4.43 |
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | For the nine months ended September 30, |
Description |  | 2023 |  |  | 2022 |
Dividend-yield |  |  | - |  |  |  | - |
Risk-free interest rate |  |  | 3.86 | % |  |  | 2.03 | %
Expected volatility |  |  | 124.62 | % |  |  | 117.21 | %
Expected life (years) |  |  | 7.00 |  |  |  | 7.00 |
Market value per share on grant date |  | $ | 3.60 |  |  | $ | 10.97 |
Fair value per option on grant date |  | $ | 3.29 |  |  | $ | 9.71 |

X
- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types: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 -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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