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v3.19.3

Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) $ in Thousands |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 23, 2019 USD ($) | Mar. 28, 2019 USD ($) | Jul. 04, 2018 USD ($) | Jul. 03, 2018 USD ($) | Feb. 01, 2018 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Mar. 31, 2019 USD ($) | Dec. 27, 2018 USD ($) | Mar. 28, 2018 USD ($)
Retained Earnings (Accumulated Deficit), Ending Balance |  |  |  |  |  |  | $ (965,903) |  | $ (965,903) |  | $ (961,539) |  |
Cash, Cash Equivalents, and Marketable Securities |  |  |  |  |  |  | 62,800 |  | 62,800 |  |  |  |
Net Cash Provided by (Used in) Operating Activities, Total |  |  |  |  |  |  |  |  | (10,485) | $ 23,595 |  |  |
Gain (Loss) Related to Litigation Settlement, Total |  |  |  |  |  |  | $ 0 | $ 28,720 | $ 0 | $ 28,720 |  |  |
Sinovel [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation Settlement, Amount Awarded from Other Party |  |  |  | $ 57,500 |  |  |  |  |  |  |  |  |
Litigation Settlement, Number of Installments |  |  |  | 2 |  |  |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  | $ 32,500 |  |  |  |  |  |  |  |  |  |
Litigation Receivable |  |  |  |  |  |  |  |  |  |  |  | $ 25,000 |
Gain (Loss) Related to Litigation Settlement, Total |  |  |  |  |  |  |  |  |  |  | $ 52,700 |  |
64 Jackson, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase and Sale Agreement, Total Consideration |  |  |  |  | $ 23,000 |  |  |  |  |  |  |  |
Purchase and Sale Agreement, Proceeds from Sale of Property, Plant and Equipment |  |  |  |  | 17,000 |  |  |  |  |  |  |  |
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total |  |  |  |  | $ 6,000 |  |  |  |  |  |  |  |
Purchase and Sale Agreement, Proceeds from Sale of Property, Plant and Equipment, Net |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,900
Notes Receivable, Stated Interest Rate |  |  |  |  |  |  |  |  |  |  | 1.96% |  | 1.96%
Proceeds from Collection of Notes Receivable | $ 3,000 | $ 3,000 |  |  |  |  |  |  |  |  |  |  |
Inox Wind Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Supply Agreement, Aggregate Value |  |  |  |  |  | $ 210,000 |  |  |  |  |  |  |
Supply Commitment, Extension Period |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Certificates of Deposit [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale, Term |  |  |  |  |  |  | 1 year |  | 1 year |  |  |  |
Certificates of Deposit [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale, Term |  |  |  |  |  |  | 2 years |  | 2 years |  |  |  |

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