XML 97 R67.htm IDEA: XBRL DOCUMENT v3.25.3

Concentration of risk (Details Narrative) - USD ($)	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Federally bank insured limits	$ 250,000
Cash deposit balance	$ 5,188,733
Revenues [Member]
Concentration risk percentage	10.00%	10.00%

X

- References

No definition available.

+ Details

Name:	class_ConcentrationRiskPercentage
Namespace Prefix:	class_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 210
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478482/942-210-50-1

+ Details

Name:	us-gaap_CashReserveDepositRequiredAndMade
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 405
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478353/942-405-50-1

+ Details

Name:	us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=class_RevenuesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: