Note 13 - Stock-based Compensation (Detail) - Non-Vested Stock Awards (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Acquired in a transfer of an entity under common control (1)		2,505,175	[1]
Time-based Options [Member]
Non-vested	4,325,000	0	[2]
Non-vested (in Dollars per share)	$ 0.38	$ 0.41	[2]
Acquired in a transfer of an entity under common control (1)		1,334,125	[2]
Acquired in a transfer of an entity under common control (1) (in Dollars per share)		$ 1.34	[2]
Granted	2,620,000	4,890,000
Granted (in Dollars per share)	$ 0.33	$ 0.44
Vested	(1,187,875)	(429,125)
Vested (in Dollars per share)	$ 0.51	$ 0.86
Forfeited	(1,530,125)	(1,470,000)
Forfeited (in Dollars per share)	$ 0.47	$ 0.52
Non-vested	4,227,000	4,325,000
Restricted Stock [Member]
Non-vested		0	[2]
Non-vested (in Dollars per share)		$ 0	[2]
Acquired in a transfer of an entity under common control (1)			[2]
Acquired in a transfer of an entity under common control (1) (in Dollars per share)			[2]
Granted	400,000	400,000
Granted (in Dollars per share)	$ 0.27	$ 0.48
Vested	(400,000)	(400,000)
Vested (in Dollars per share)	$ 0.27	$ 0.48

[1] As recast to reflect the activity of SGT beginning January 1, 2011 combined with the balances of Solar Power, Inc. beginning March 31, 2011, 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 activity of SGT beginning January 1, 2011 combined with the balances of Solar Power, Inc. beginning March 31, 2011, as required under the accounting guidelines for a transfer of an entity under common control (refer to Note 5-Acquisition of Solar Green Technology).