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Acquisition of EGEN Assets (Details Narrative) - USD ($) |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2016 | Jun. 20, 2014 | Jun. 20, 2014 | Jun. 30, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Asset impairment charges, total |  |  |  |  |  |  |  |  | $ 2,400,000 |  |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  |  |  |  |  |  |  | $ 4,500,000 | $ 2,500,000
Finite-lived intangible assets, net, ending balance |  |  |  |  |  | $ 454,634 |  |  | 454,634 |  | 568,292 |
Aspire Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, net, ending balance |  |  |  |  |  | 454,634 |  |  | 454,634 |  | 568,929 |
Finite-lived intangible assets, accumulated amortization |  |  |  |  |  | 1,136,580 |  |  | 1,136,580 |  | 1,022,922 |
IPR&D Drug Technology Platforms [Member] |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges, total |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |
EGEN Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |
Potential future earn-out payments |  |  |  | $ 30,400,000 | $ 30,400,000 |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  |
Stock issued during period, shares, acquisitions |  |  |  | 241,590 |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  | 13,900,000 |  |  | $ 12,800,000 |  | $ 13,100,000 |  | $ 12,500,000
Goodwill, acquisition |  |  |  |  |  |  |  |  | 2,000,000 |  |  |
EGEN Inc [Member] | Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  |  |  |  |  | $ 1,600,000 |  |  |
Finite-lived intangible asset, useful life |  |  |  |  |  |  |  |  | 7 years |  |  |
Amortization expense |  |  |  |  |  | 56,829 | $ 56,829 |  | $ 113,658 | $ 113,658 |  |
EGEN Inc [Member] | Glioblastoma Multiforme Brain Cancer [Member] |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges, total | $ 9,400,000 | $ 9,400,000 |  |  |  |  |  |  |  |  |  |
EGEN Inc [Member] | Ovarian Cancer [Member] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets, net, ending balance |  |  |  |  |  | $ 13,300,000 |  |  | 13,300,000 |  | $ 13,300,000 |
EGEN Inc [Member] | IPR&D Drug Technology Platforms [Member] |  |  |  |  |  |  |  |  |  |  |  |
Indefinite lived intangible assets |  |  |  |  |  |  |  |  | $ 24,200,000 |  |  |
EGEN Inc [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price for the asset acquisition |  |  |  | $ 44,400,000 |  |  |  |  |  |  |  |
Potential future earn-out payments |  |  |  | $ 30,400,000 | $ 30,400,000 |  |  |  |  |  |  |

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