Note 18 - Operating Risk and Geographical Information (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Customer Concentration Risk [Member] | Minimum [Member] | Total Net Revenue [Member]
Concentration Risk, Percentage	10.00%
Customer Concentration Risk [Member] | Minimum [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	10.00%
Total Net Revenue [Member]
Concentration Risk, Percentage	62.00%	65.00%	[1]
Accounts Receivable [Member]
Concentration Risk, Percentage	66.00%	65.00%	[1]

[1] As adjusted to reflect the balances 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).