Note 11 - Stock-based Compensation (Detail) - Consolidated Stock-Based Compensation Expense, by Type of Awards (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stock-based compensation expense	$ 71	$ 98	[1]
Stock Options [Member]
Stock-based compensation expense	71	98
Stock Compensation Plan [Member]
Stock-based compensation expense	$ 71	$ 98

[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 ).