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Fair Value Measurement - Fair Value Measurements Change in Level 3 Inputs (Details)
6 Months Ended
Jun. 30, 2020
USD ($)
Fair value measurement, beginning balance $ 8,093,809
Issuance of secured convertible debt 778,859
Conversion of secured convertible debentures (2,924,740)
Repayment of 2019 secured convertible notes (748,180)
Change in fair value of secured convertible debentures and proceeds investment agreement (1,548,748)
Fair value measurement, ending balance 3,615,000
2019 Secured Convertible Notes [Member]  
Fair value measurement, beginning balance 1,593,809
Issuance of secured convertible debt
Conversion of secured convertible debentures (1,259,074)
Repayment of 2019 secured convertible notes (747,180)
Change in fair value of secured convertible debentures and proceeds investment agreement 412,445
Fair value measurement, ending balance
2020 Convertible Notes [Member]  
Fair value measurement, beginning balance
Issuance of secured convertible debt 778,859
Conversion of secured convertible debentures (1,665,666)
Repayment of 2019 secured convertible notes (1,000)
Change in fair value of secured convertible debentures and proceeds investment agreement 887,807
Fair value measurement, ending balance
Proceeds Investment Agreement [Member]  
Fair value measurement, beginning balance 6,500,000
Issuance of secured convertible debt
Conversion of secured convertible debentures
Change in fair value of secured convertible debentures and proceeds investment agreement (2,885,000)
Fair value measurement, ending balance $ 3,615,000