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v3.19.3.a.u2

Note 1 - Nature of the Business and Operations and Liquidity (Details Textual) |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 13, 2019 USD ($) $ / shares shares | May 23, 2019 USD ($) | Mar. 28, 2019 USD ($) | Jul. 04, 2018 USD ($) | Jul. 03, 2018 USD ($) | Feb. 01, 2018 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Mar. 31, 2019 USD ($) | Dec. 27, 2018 USD ($) | Mar. 28, 2018 USD ($) | Nov. 13, 2014 $ / shares
Retained Earnings (Accumulated Deficit), Ending Balance |  |  |  |  |  |  |  | $ (972,748,000) |  | $ (972,748,000) |  | $ (961,539,000) |  |  |
Cash, Cash Equivalents, and Marketable Securities |  |  |  |  |  |  |  | 60,500,000 |  | 60,500,000 |  |  |  |  |
Net Cash Provided by (Used in) Operating Activities, Total |  |  |  |  |  |  |  |  |  | (17,779,000) | $ 47,786,000 |  |  |  |
Gain (Loss) Related to Litigation Settlement, Total |  |  |  |  |  |  |  | $ 0 | $ 24,978,000 | 0 | 53,698,000 |  |  |  |
Proceeds from Warrant Exercises |  |  |  |  |  |  |  |  |  | $ 6,139,000 |  |  |  |  |
November 2014 Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 7.81 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7.81
Proceeds from Warrant Exercises | $ 6,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Warrants Exercised | shares | 786,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Warrants Expired | shares | 32,181 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sinovel [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation Settlement, Amount Awarded from Other Party |  |  |  |  | $ 57,500,000 |  |  |  |  |  |  |  |  |  |
Litigation Settlement, Number of Installments |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Proceeds from Legal Settlements |  |  |  | $ 32,500,000 |  |  |  |  |  |  |  |  |  |  |
Litigation Receivable |  |  |  |  |  |  |  |  |  |  |  |  | $ 25,000,000 |  |
Gain (Loss) Related to Litigation Settlement, Total |  |  |  |  |  |  |  |  |  |  |  | $ 52,700,000 |  |  |
64 Jackson, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase and Sale Agreement, Total Consideration |  |  |  |  |  | $ 23,000,000 |  |  |  |  |  |  |  |  |
Purchase and Sale Agreement, Proceeds from Sale of Property, Plant and Equipment |  |  |  |  |  | 17,000,000 |  |  |  |  |  |  |  |  |
Financing Receivable, after Allowance for Credit Loss, Noncurrent, Total |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |
Purchase and Sale Agreement, Proceeds from Sale of Property, Plant and Equipment, Net |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,900,000 |
Notes Receivable, Stated Interest Rate |  |  |  |  |  |  |  |  |  |  |  | 1.96% |  | 1.96% |
Proceeds from Collection of Notes Receivable |  | $ 3,000,000 | $ 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Inox Wind Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Supply Agreement, Aggregate Value |  |  |  |  |  |  | $ 210,000,000 |  |  |  |  |  |  |  |
Supply Commitment, Extension Period |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Certificates of Deposit [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale, Term |  |  |  |  |  |  |  | 330 days |  | 330 days |  |  |  |  |
Certificates of Deposit [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Securities, Available-for-sale, Term |  |  |  |  |  |  |  | 2 years |  | 2 years |  |  |  |  |

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