Note 7 - Goodwill and Other Intangible Assets (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Goodwill	$ 0		$ 0	$ 5,200,000
Goodwill, Impairment Loss		5,200,000
Impairment of Intangible Assets, Finite-lived	148,000		148,000
Finite-Lived Intangible Assets, Net	1,560,000		1,703,000
Solar Power [Member]
Goodwill				$ 4,700,000