Note 2 - Going Concern Considerations and Management's Plan (Detail) (USD $)	3 Months Ended							6 Months Ended				0 Months Ended	3 Months Ended		3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012		Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2012 Extended Line of Credit [Member] Cathay Bank [Member]	Jun. 30, 2013 Line of Credit [Member] Cathay Bank [Member]	Dec. 31, 2012 Line of Credit [Member] Cathay Bank [Member]	Dec. 31, 2012 US and Greet Project Solar Panel Purchases [Member] LDK [Member]	Dec. 31, 2012 Italian Solar Development Projects Solar Panel Purchases [Member] LDK [Member]	Jun. 22, 2011 LDK [Member]	Mar. 31, 2013 LDK [Member]	Dec. 31, 2012 Cathay Bank [Member]	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (3,141,000)	$ (1,096,000)	[1],[2],[3]
Retained Earnings (Accumulated Deficit)	(26,971,000)			(23,830,000)
Working Capital	11,500,000				61,100,000
Working Capital	11,500,000				61,100,000
Percentage of Common Stock Outstanding Owned by Parent Company	71.00%											71.00%
Line of Credit Facility, Maximum Borrowing Capacity							9,000,000
Line of Credit Facility, Percentage of Amount Outstanding to be Extended							70.00%
Line of Credit Facility, Amount Outstanding (in Dollars)														7,000,000
Debt Instrument, Basis Spread on Variable Rate									2.00%
Debt Instrument, Floor Rate									6.00%
Debt Instrument, Periodic Payment								500,000
Accounts Payable, Related Parties										37,500,000	12,400,000		51,400,000
Accounts Payable, Related Parties, Payment Term													4 months
Accounts Receivable, Collection Term															9 months	12 months
Cash and Cash Equivalents, at Carrying Value	$ 1,775,000	$ 18,626,000	[3]	$ 17,823,000	$ 24,523,000	[3]

[1] As recast to reflect the financial results of SGT, combined with the financial results of Solar Power, Inc. as required under the accounting guidelines for a transfer of an entity under common control (refer to Note 5 -Acquisition of Solar Green Technology ).

[2] As recast to reflect the financial results of SGT combined with the financial results of Solar Power, Inc., as required under the accounting guidelines for a transfer of an entity under common control (see Note 5- Acquisition of Solar Green Technology ).

[3] As recast to reflect the financial results of SGT combined with the financial results of Solar Power, Inc., as required under the accounting guidelines for a transfer of an entity under common control (refer to Note 5 -Acquisition of Solar Green Technology ).