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Common Stock Purchase Warrants - Summary of Warrant Activity (Details) - Warrants [Member] - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Warrants, Vested, Beginning balance | 4,657,145 | 3,233,466
Warrants, Granted | 678,428 | 1,478,379
Warrants, Warrant reset |  | 159,538
Warrants, Exercised | (529,000) | (171,738)
Warrants, Cancelled | (18,000) | (42,500)
Warrants, Vested, Ending balance | 4,824,573 | 4,657,145
Weighted average exercise price, Vested, Beginning balance | $ 5.54 | $ 6.57
Weighted average exercise price, Granted | 1.75 | 2.90
Weighted average exercise price, Warrant reset |  | 0.52
Weighted average exercise price, Exercised | (2.96) | (0.52)
Weighted average exercise price, Cancelled | (3.50) | (8.50)
Weighted average exercise price, Vested, Ending balance | $ 5.15 | $ 5.54

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- Definition Warrant reset. + References No definition available. + Details
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- Definition Weighted average exercise price, Exercised. + References No definition available. + Details
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- Definition Weighted average exercise price, Cancelled. + References No definition available. + Details
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- Definition Weighted average exercise price, Granted. + References No definition available. + Details
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- Definition Number of non-option equity instruments exercised by participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Net number of non-option equity instruments granted to participants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Details
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