Note 6 - Accounts and Notes Receivable (Details) (USD $)	9 Months Ended			6 Months Ended	3 Months Ended			3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Incorrectly Reported In Previous Period [Member]	Sep. 30, 2013 Sale of Greece Project [Member]	Sep. 30, 2013 Sale of Greece Project [Member] Completed-Contract Method [Member]	Sep. 30, 2013 Second Unrelated Customer [Member]	Jun. 30, 2013 Second Unrelated Customer [Member] Expected Collection Period [Member]	Sep. 30, 2013 EPC Contract [Member]	Dec. 31, 2012 EPC Contract [Member]	Sep. 30, 2013 Solar Hub [Member]	Mar. 31, 2013 Solar Hub [Member]	Dec. 31, 2012 Solar Hub [Member]	Apr. 27, 2012 Solar Hub [Member]	Jun. 08, 2012 Solar Hub [Member] Maximum [Member]
Note 6 - Accounts and Notes Receivable (Details) [Line Items]
Revenues						$ 13,900,000
Increase (Decrease) in Accounts Receivable	(9,401,000)	(15,836,000)			8,800,000
Account Receivable Extended Collection Period					6 years
Accrued Liabilities, Current	4,168,000		6,536,000		5,100,000
Accounts Receivable, Net, Current	16,646,000		43,807,000		1,600,000		1,500,000
Accounts Receivable, Net, Noncurrent	12,816,000				7,100,000		5,700,000
Reclassifcation of Account Receivable from Current to Noncurrent								5,900,000
Note Receivable, Interest Rate									5.00%			10.00%		6.00%
Financing Receivable, Net	15,165,000		14,120,000						6,700,000	7,000,000	8,400,000		7,100,000
Notes, Loans and Financing Receivable, Net, Noncurrent	29,347,000								29,300,000
Payments to Acquire Notes Receivable	1,320,000	9,431,000		20,600,000
Proceeds from Collection of Notes Receivable	275,000	2,286,000		3,600,000
Other Significant Noncash Transaction, Value of Consideration Given				13,600,000
Financing Receivable, Gross														$ 1,000,000	$ 9,000,000