XML 14 R4.htm IDEA: XBRL DOCUMENT
v3.23.2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Common Class A [Member] |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Common Class B [Member] |  |
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |