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Earn-out Milestone Liability (Details Narrative) - USD ($) |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 20, 2014 | Jun. 20, 2014 | Sep. 30, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 28, 2019 | Sep. 30, 2018
Fair value of acquisition consideration |  |  |  |  | $ 4,500,000 | $ 2,500,000 |  |
Warrants to purchase common stock |  |  |  | 1,167,064 | 13,927 |  |  |
Warrant exercise price |  |  |  | $ 0.01 |  |  |  |
Gain (loss) from change in fair value of earn out milestone liability |  |  |  | $ (3,189,955) | $ (3,630,861) |  |  |
EGEN Inc [Member] |  |  |  |  |  |  |  |
Future earn-out payments | $ 30,400,000 | $ 30,400,000 |  |  |  |  |  |
Fair value of acquisition consideration |  | $ 13,900,000 |  |  |  |  |  |
Risk adjusted assessment of each milestone |  |  |  |  | 80.00% |  |  |
Estimated time to achieve the milestone |  |  |  |  | 1 year 2 months 30 days |  |  |
Warrants to purchase common stock |  |  |  |  |  |  |  | 200,000
Warrants strike price |  |  |  |  |  |  |  | $ 0.01
Warrant exercise price |  |  |  |  |  |  |  | $ 2.00
EGEN Inc [Member] | Amended Asset Purchase Agreement [Member] |  |  |  |  |  |  |  |
Earnout milestone liability |  |  |  |  |  |  | $ 12,400,000 |
EGEN Inc [Member] | Amended Asset Purchase Agreement [Member] | 10 Business Days of Achieving Milestone [Member] |  |  |  |  |  |  |  |
Earnout milestone liability |  |  |  |  |  |  | 7,000,000 |
EGEN Inc [Member] | Amended Asset Purchase Agreement [Member] | Within One Year of Achieving Milestone [Member] |  |  |  |  |  |  |  |
Earnout milestone liability |  |  |  |  |  |  | $ 12,400,000 |
EGEN Inc [Member] | Fair Value Earnout Milestone Liability [Member] |  |  |  |  |  |  |  |
Fair value of acquisition consideration |  |  |  | 6,200,000 | $ 8,900,000 | $ 12,500,000 |  |
Gain on non-cash benefit |  |  |  | $ 2,700,000 | $ 3,600,000 |  |  |
Gain (loss) from change in fair value of earn out milestone liability |  |  | $ 3,900,000 |  |  |  |  |
EGEN Inc [Member] | Amended Asset Purchase Agreement Option Payment 1 [Member] |  |  |  |  |  |  |  |
Risk adjusted assessment of each milestone |  |  |  | 665.00% |  |  |  |
Gain (loss) from change in fair value of earn out milestone liability |  |  |  | $ 7,000,000 |  |  |  |
EGEN Inc [Member] | Amended Asset Purchase Agreement Option Payment 2 [Member] |  |  |  |  |  |  |  |
Risk adjusted assessment of each milestone |  |  |  | 35.00% |  |  |  |
Gain (loss) from change in fair value of earn out milestone liability |  |  |  | $ 12,400,000 |  |  |  |
EGEN Inc [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Risk adjusted assessment of each milestone | 10.00% | 10.00% |  |  |  |  |  |
Estimated time to achieve the milestone |  | 1 year 6 months |  |  |  |  |  |
EGEN Inc [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Risk adjusted assessment of each milestone | 67.00% | 67.00% |  |  |  |  |  |
Estimated time to achieve the milestone | 2 years 6 months |  |  |  |  |  |  |

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