Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 28, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Entity File Number	0-30351
Entity Registrant Name	SPI Energy Co., Ltd.
Entity Central Index Key	0001210618
Entity Tax Identification Number	20-4956638
Entity Incorporation, State or Country Code	A1
Entity Address, Address Line One	4677 Old Ironsides Drive, Suite 190
Entity Address, City or Town	Santa Clara
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95054
City Area Code	(408)
Local Phone Number	919-8000
Title of 12(b) Security	Ordinary Shares, par value $0.0001 per share
Trading Symbol	SPI
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 85,932,214
Entity Common Stock, Shares Outstanding		26,376,783
ICFR Auditor Attestation Flag	true
Auditor Firm ID	5395
Auditor Name	Marcum Bernstein & Pinchuk LLP
Auditor Location	New York, New York