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Related Party Transaction and Balance (Details) - Schedule of nature of relationships with related parties	12 Months Ended
	Mar. 31, 2023
Zhong Yang Holdings Limited [Member]
Related Party Transaction and Balance (Details) - Schedule of nature of relationships with related parties [Line Items]
Nature of relationships with related parties	Predecessor Parent Company, owned by the same group of shareholders and determined to be a related party upon the completion of the Reorganization on March 26, 2020
Sunx Global Limited [Member]
Related Party Transaction and Balance (Details) - Schedule of nature of relationships with related parties [Line Items]
Nature of relationships with related parties	Predecessor Parent Company owns 95% of Sunx Global Limited
Mr. Huaixi Yang [Member]
Related Party Transaction and Balance (Details) - Schedule of nature of relationships with related parties [Line Items]
Nature of relationships with related parties	Immediate family member of Ms. Junli Yang, the Chairwoman of the Board
WSYQR Limited [Member]
Related Party Transaction and Balance (Details) - Schedule of nature of relationships with related parties [Line Items]
Nature of relationships with related parties	Wholly owned by Mr. Huaixi Yang

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- References

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- Definition

This element represents a description of the nature of common ownership or management control relationships with other entities, regardless of there being transactions between the entities, when the existence of that control could result in operating results or financial position of the reporting entity significantly different from that which would have been obtained if the entities' were autonomous.

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No definition available.

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- Details

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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=top_SunxGlobalLimitedMember
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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=top_MrHuaixiYangMember
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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=top_WSYQRLimitedMember
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