Note 10 - Stockholders' Equity (Detail)	0 Months Ended				1 Months Ended		3 Months Ended
	Feb. 15, 2012 Warrant [Member] Cathay Bank [Member]	Jun. 08, 2012 Director [Member] Equity Incentive Plan [Member]	Jul. 22, 2011 Director [Member] Equity Incentive Plan [Member] USD ($)	Jun. 12, 2012 Director [Member] Equity Incentive Plan [Member] USD ($)	Jul. 31, 2012 LDK Europe [Member]	Jul. 31, 2012 Two Founders of SGT [Member]	Mar. 31, 2013 Cathay Bank [Member] Amortization of Warrant Value to Interest Expense [Member] USD ($)	Mar. 31, 2012 Cathay Bank [Member] Amortization of Warrant Value to Interest Expense [Member] USD ($)	Feb. 15, 2012 Cathay Bank [Member] USD ($)	Jul. 31, 2012 Solar Green Technology [Member] USD ($)	Jul. 31, 2012 Solar Green Technology [Member] EUR (€)
Stock Issued During Period, Shares, Restricted Stock Award, Gross		400,000	400,000
Share Price (in Dollars per share)			$ 0.48	$ 0.265
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares					9,771,223	1,814,655
Business Acquisition, Cost of Acquired Entity, Purchase Price (in Euro)										$ 6,300,000	€ 5,000,000
Business Acquisition, Cost of Acquired Entity, Purchase Price (in Dollars)										6,300,000	5,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)									0.75
Line of Credit Facility, Amount Outstanding (in Dollars)									9,000,000
Class of Warrant or Right, Fair-valued Price Per Share (in Dollars per share)									$ 0.29
Fair Value Assumptions, Expected Volatility Rate	103.00%
Fair Value Assumptions, Expected Dividend Rate	0.00%
Fair Value Assumptions, Expected Term	3 years
Interest Expense, Debt (in Dollars)							$ 0	$ 18,500