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Note 2 - Summary of Significant Accounting Policies (Detail) (USD $) | 0 Months Ended | 1 Months Ended | 6 Months Ended | 12 Months Ended | 61 Months Ended |  |  |  | 0 Months Ended | 1 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 14, 2011 | Jul. 08, 2011 | Oct. 30, 2012 | Oct. 31, 2012 | Nov. 30, 2011 | Jun. 30, 2011 | Jul. 08, 2011 | Oct. 31, 2007 | Jan. 31, 2002 | Dec. 14, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Jun. 30, 2011 | Oct. 19, 2010 | Dec. 31, 1988 | Mar. 05, 2013 Subsequent Event [Member] Non-Convertible Secured Debt (Member) | Mar. 05, 2013 Subsequent Event [Member] | Mar. 15, 2013 Subsequent Event [Member] | Nov. 30, 2011 Private Placement [Member] | Oct. 31, 2012 Private Placement [Member] | Dec. 31, 2012 General and Administrative Expense [Member] | Dec. 31, 2011 General and Administrative Expense [Member] | Dec. 31, 2010 General and Administrative Expense [Member] | Dec. 31, 2012 Minimum [Member] Land Improvements and Buildings (Member) | Dec. 31, 2012 Minimum [Member] Machinery and Equipment (Member) | Dec. 31, 2012 Maximum [Member] Land Improvements and Buildings (Member) | Dec. 31, 2012 Maximum [Member] Machinery and Equipment (Member)
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  |  |  | $ (19,574,000) | $ (16,837,000) | $ (15,899,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Working Capital |  |  |  |  |  |  |  |  |  |  | (14,000) |  |  |  |  |  |  |  | 17,500,000 |  |  |  |  |  |  |  |  |  |
Net Cash Provided by (Used in) Operating Activities |  |  |  |  |  |  |  |  |  |  | (11,400,000) | (7,514,000) | (6,761,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments For Extension of Agreement |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Convertible Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private Placement, Term of Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  | five |  |  |  |  |  |  |  |  |  |  |  |  |  |
Private Placement, Convertible Term Loan, Coupon Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars) |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Increase, Additional Borrowings (in Dollars) |  |  | 5,000,000 | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,500,000 |  |  |  |  |  |  |  |  |  |
Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30,000,000 |  |  |  |  |  |  |  |  |  |  |
Outstanding Debt, Held in Convertible Bond Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,000,000 |  |  |  |  |  |  |  |  |  |
Shelf Registration, Sale of Common Stock, Sale up to |  |  |  |  |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock (in Dollars) | 5,100,000 | 4,000,000 |  |  |  |  |  |  |  | 5,100,000 |  | 15,129,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in Shares) |  | 363,636 |  |  | 666,667 |  | 363,636 | 300,000 |  | 570,000 |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |
Sale of Stock, Price Per Share (in Dollars per share) | $ 9 | $ 11 |  |  | $ 9 |  | $ 11 |  |  | $ 9 |  |  |  |  |  |  |  |  |  |  | $ 9 |  |  |  |  |  |  |  |
Proceeds from Issuance of Private Placement (in Dollars) |  |  |  |  | 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Issued (in Shares) | 570,000 |  |  |  | 3 |  |  |  |  | 570,000 | 15,438,961 | 15,429,541 |  |  |  |  |  |  |  |  | 666,667 | 250,000 |  |  |  |  |  |  |
Debt Instrument, Convertible, Terms of Conversion Feature |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | three |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) |  |  |  | 250,000 | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock Shares Available for Warrants Exercised (in Shares) |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item) |  |  |  | 10 | 13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  |  |  |  |  |  |  | 5,014,000 | 2,000,000 | 5,000,000 |  |  |  |  |  |  | 17,500,000 |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation (in Dollars) |  |  |  |  |  |  |  |  |  |  | 383,000 | 2,376,000 | 4,009,000 |  |  |  |  |  |  |  |  |  | 400,000 | 2,400,000 | 4,000,000 |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) |  |  |  |  |  |  |  |  |  |  | 0 |  | 2,655,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number Diluted Shares Outstanding Adjustment (in Shares) |  |  |  |  |  |  |  |  |  |  |  | 2,996,000 |  | 2,423,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years | 5 years | 45 years | 15 years
Goodwill |  |  |  |  |  |  |  |  |  |  | 3,813,000 | 3,813,000 | 3,813,000 |  |  |  | 7,006,000 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Amortized portion |  |  |  |  |  |  |  |  | 3,193,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Assets Acquired |  |  |  |  |  |  |  |  |  |  | 1,090,000 | 1,826,000 | 1,276,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes Paid |  |  |  |  |  |  |  |  |  |  | $ 10,000 | $ 6,500 | $ 6,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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