Warrants (Details) - Level 3 [Member]	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Minimum [Member]
Class Of Warrant Or Right [Line Items]
Warrants, outstanding, term	2 years 7 months 24 days	3 years 7 months 24 days
Minimum [Member] | Stock Price [Member]
Class Of Warrant Or Right [Line Items]
Stock price	2.15	5.75
Minimum [Member] | Volatility [Member]
Class Of Warrant Or Right [Line Items]
Stock price	60.1	36.8
Minimum [Member] | Risk-Free Rate [Member]
Class Of Warrant Or Right [Line Items]
Stock price	0.16	1.55
Minimum [Member] | Dividend Yield [Member]
Class Of Warrant Or Right [Line Items]
Stock price	8.17	7.58
Maximum [Member]
Class Of Warrant Or Right [Line Items]
Warrants, outstanding, term	3 years 4 months 24 days	4 years 4 months 24 days
Maximum [Member] | Stock Price [Member]
Class Of Warrant Or Right [Line Items]
Stock price	3.20	8.84
Maximum [Member] | Volatility [Member]
Class Of Warrant Or Right [Line Items]
Stock price	71.9	44.4
Maximum [Member] | Risk-Free Rate [Member]
Class Of Warrant Or Right [Line Items]
Stock price	0.31	2.21
Maximum [Member] | Dividend Yield [Member]
Class Of Warrant Or Right [Line Items]
Stock price	9.00	10.30