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Warrants (Tables)
12 Months Ended
Dec. 31, 2020
Warrants [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights
 Number
of
Options
Weighted
Average
Exercise
Price
Aggregate
Intrinsic
Value
(in thousands)
Exercisable at January 1, 201952,632 $866.70 $— 
Granted497,753 48.66 — 
Exercised(457,132)35.78 — 
Expired(1)6,075,000.00 — 
Cancelled— — — 
Outstanding at December 31, 201993,252 $503.09 $— 
Granted11,000,000 $0.91 — 
Exercised(3,000,000)— — 
Expired(2)1,336,500.00 — 
Cancelled— — — 
Outstanding at December 31, 20208,093,250 $6.70 $— 
Exercisable at December 31, 201993,252 $503.09 — 
Exercisable at December 31, 20208,093,250 $6.70 —