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Fair Value Measurements (Details Narrative) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Change in valuation of warrant derivative liabilities | $ 243,276 | $ (166,075) | $ 382,495 | $ (541,770) |
Change in valuation of embedded derivative liabilities | $ 2,922,000 | $ (1,396,000) | 4,543,000 | $ (3,779,000) |
Level 3 [Member] |  |  |  |  |
Change in valuation of embedded derivative liabilities |  |  | $ 8,958,000 |  | $ 13,501,000

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 15 -URI http://asc.fasb.org/subtopic&trid=2229187 + Details
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