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Secured Convertible Notes and Related Common Stock Purchase Warrants - Summary of Convertible Notes (Parenthetical) (Details) | 9 Months Ended
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Sep. 30, 2018
June 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period One [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 75.00%
Debt instrument, maturity date | Dec. 04, 2018
June 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period Two [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 25.00%
Debt instrument, maturity date | Dec. 04, 2019
July 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period One [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 75.00%
Debt instrument, maturity date | Jan. 20, 2019
July 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period Two [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 25.00%
Debt instrument, maturity date | Jan. 20, 2020
August 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period One [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 75.00%
Debt instrument, maturity date | Mar. 01, 2019
August 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period Two [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 25.00%
Debt instrument, maturity date | Mar. 01, 2020
September 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period One [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 75.00%
Debt instrument, maturity date | Mar. 21, 2019
September 2018 Convertible Note [Member] | Debt Instrument, Redemption, Period Two [Member] |
Debt Instrument [Line Items] |
Debt instrument, maturity percentage | 25.00%
Debt instrument, maturity date | Mar. 21, 2020

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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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