Share-Based Compensation - Warrants (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Apr. 22, 2020	Dec. 31, 2019	Sep. 24, 2018
Class of Warrant or Right [Line Items]
Number of Warrants Outstanding and Exercisable	900,000		8,995,906	8,000,000
Exercise price of warrants	$ 3.06	$ 0.5869		$ 5.375
2014 Broker Warrants (Series E Financing)
Class of Warrant or Right [Line Items]
Number of Warrants Outstanding and Exercisable			1,671,196
Exercise price of warrants	$ 1.00
Expiration Date	Feb. 22, 2026
2018 IDV (Senior secured convertible note)
Class of Warrant or Right [Line Items]
Number of Warrants Outstanding and Exercisable			4,658,043
Exercise price of warrants	$ 0.59
Expiration Date	Sep. 27, 2026
2019 IDV (Senior secured convertible note)
Class of Warrant or Right [Line Items]
Number of Warrants Outstanding and Exercisable			1,666,667
Exercise price of warrants	$ 1.50
Expiration Date	Dec. 13, 2024
2019 YA II PN, Ltd. (Senior secured convertible debenture) I
Class of Warrant or Right [Line Items]
Number of Warrants Outstanding and Exercisable			1,000,000
Exercise price of warrants	$ 1.00
Expiration Date	Dec. 13, 2020
Service providers
Class of Warrant or Right [Line Items]
Number of Warrants Outstanding and Exercisable	200,000
Exercise price of warrants	$ 5.00
Expiration Date	Jul. 01, 2022
Service providers
Class of Warrant or Right [Line Items]
Number of Warrants Outstanding and Exercisable	700,000
Exercise price of warrants	$ 2.50
Service providers | Maximum
Class of Warrant or Right [Line Items]
Expiration Date	Oct. 01, 2022
Service providers | Minimum
Class of Warrant or Right [Line Items]
Expiration Date	Feb. 28, 2022