Document And Entity Information	9 Months Ended
	Sep. 30, 2014	Mar. 31, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	Solar Power, Inc.
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		601,644,944
Amendment Flag	true
Amendment Description	Solar Power, Inc. (the "Company") is filing this Amendment No. 1 to its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 13, 2014. Based on our review, we determined that we inappropriately recognized revenue related to the sale of a solar project in the U.S. for the three-month period ended September 30, 2014 resulting from inadvertent misapplication of U.S. GAAP in analyzing the related construction contract with respect to the project by using the percentage-of-completion method of accounting, which should be accounted for under the rules of real estate accounting and the related revenue should be recognized using full accrual method when we do not retain a substantial continuing involvement with the property. As we had not been released from substantial continuing involvement as of September 30, 2014, no revenue arising out of the sale of this project could be recognized in accordance with the full accrual rule under U.S. GAAP. Therefore, we restated our consolidated balance sheets as of September 30, 2014 and consolidated statements of operations, comprehensive loss, and cash flows for the three-month and nine-month periods ended September 30, 2014 to reflect the above changes. This Amendment No. 1 amends and restates the following item of our Form 10-Q as affected by the restatement of consolidated balance sheets as of September 30, 2014 and consolidated statements of operations, comprehensive loss, and cash flows for the three-month and nine-month periods ended September 30, 2014: (i) Part I, Item 1 - Financial Statements and (ii) Part I, Item 2 - Management's Discussion and Analysis of Financial Condition and Results of Operations. This Amendment No. 1 is being filed in order to restate: Our consolidated balance sheets as of September 30, 2014 by decreasing consolidated total assets by $576 thousand; and Our consolidated statements of operations and comprehensive loss for the three months ended September 30, 2014 by increasing consolidated net loss by $576 thousand and restate our consolidated statements of operations and consolidated loss for the nine months ended September 30, 2014 by increasing consolidated net loss by $576 thousand. A summary of the effects of this restatement to our financial statements included within this Amendment No. 1 is presented in Note 20 to the Condensed Consolidated Financial Statements, "Restatement of Financial Statements." All information in our Quarterly Report on Form 10-Q for the nine months ended September 30, 2014, as amended by this Amendment No. 1, speaks as of the date of the original filing of our Form 10-Q for such period and does not reflect any subsequent information or events, except as expressly noted in this Amendment No. 1. All information contained in this Amendment No. 1 is subject to updating and supplementing as provided in our reports, as amended, filed with the Securities and Exchange Commission subsequent to the date of the initial filing of our Quarterly Report on Form 10-Q for the nine months ended September 30, 2014.
Entity Central Index Key	0001210618
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Sep. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3