Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 17, 2020	Jun. 30, 2019
Cover [Abstract]
Entity Registrant Name	Tottenham Acquisition I Ltd
Entity Central Index Key	0001731176
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Is Entity's Reporting Status Current?	No
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$ 60,843,000
Entity Common Stock, Shares Outstanding		5,965,000
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Entity Emerging Growth Company	true
Entity Small Business	true
Entity Ex Transition Period	false
Entity Well Known Seasoned Issuer	No
Entity Voluntary Filer	No
Entity Shell Company	false
Entity Interactive data current	Yes
Entity File Number	001-38614
Entity Incorporation State	D8