v3.26.1
Related parties (Details 1) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Total due to related parties - current
$ 36,234
$ 63,316
Dream Go Inc. [Member]
Total due to related parties - current
$ 36,234
$ 63,316
X
- References
No definition available.
+ Details
Name:
class_DueToRelatedPartyTransactionAmountsOfTransaction
Namespace Prefix:
class_
Data Type:
xbrli:monetaryItemType
Balance Type:
credit
Period Type:
instant
X
- Details
Name:
us-gaap_RelatedPartyTransactionAxis=class_DreamGoIncMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: