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The Business Financial Information & Liquidity (Details) - USD ($) |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 16, 2017 | Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016 | Mar. 11, 2016
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |
Proceeds From Licensing Agreements, Milestone Payments |  | $ (5,000,000) | $ 0 |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 19.90%
Equity Method Investment, Ownership Percentage, If Initial Payment and Termination Fee Not Paid |  | 32.20% |  |  |
Equity Method Investment, Ownership Percentage, If Agreement Is Terminated |  | 26.00% |  |  |
Net loss |  | $ (9,793,324) | (12,047,796) |  |
Net cash used in operating activities |  | (10,087,908) | $ (8,028,298) |  |
Accumulated deficit |  | (414,148,636) |  | $ (404,788,809) |
Hitachi Chemical Co., LTD [Member] |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |
Proceeds From Licensing Agreements, Milestone Payments | $ 5,000,000 | 5,000,000 |  |  |
Proceeds From Licensing Agreements, Initial Payment | $ 5,000,000 | 5,000,000 |  |  |
Loss on Contract Termination |  | $ 5,000,000 |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  | 21.00%

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