Preferred Stock - Schedule of Components of Preferred Stock (Details) - USD ($)			1 Months Ended	12 Months Ended
	Jun. 28, 2019	Aug. 10, 2018	Nov. 11, 2020	Dec. 31, 2020	Dec. 31, 2019
Preferred stock, components value				$ 55,653,730
Legal fees and other costs				(323,137)	$ (202,382)
Conversion of preferred stock into common stock				300,000
Payments made to B. Riley FBR from proceeds: Less: placement fee				(4,241,387)	(3,550,000)
Preferred stock, components value				$ 18,415,992	$ 55,653,730
Series H Preferred Stock [Member]
Preferred stock, shares issued				19,400
Preferred stock, components value				$ 18,045,496
Issuance of Preferred Stock. shares				108
Issuance of Preferred Stock				$ 130,896
Stock issuance cost		$ (18,045,496)		(17,896)
Net proceeds received upon issuance of preferred stock		$ 19,399,250		$ 113,000
Conversion of preferred stock into common stock, shares				(300)
Conversion of preferred stock into common stock				$ (300,000)
Issuance of preferred stock upon conversion, shares				389
Issuance of preferred stock upon conversion				$ 389,000
Net issuance of Preferred Stock, shares				197
Net issuance of Preferred Stock				$ 202,000
Preferred stock, shares issued				19,597	19,400
Preferred stock, components value				$ 18,247,496	$ 18,045,496
Beneficial conversion feature				$ 502,000
Series I Preferred Stock [Member]
Preferred stock, shares issued				23,100
Preferred stock, components value				$ 19,699,742
Issuance of Preferred Stock. shares					231,000
Issuance of Preferred Stock					$ 23,100,000
Cash paid to B. Riley FBR as placement fee					(1,386,000)
Legal fees and other costs					(73,858)
Stock issuance cost					(1,459,858)
Less Liquidated Damages recognized upon issuance					(1,940,400)
Total issuance costs and Liquidated Damages					(3,400,258)
Net proceeds received upon issuance of preferred stock	$ 23,100,000				$ 23,100,000
Conversion of preferred stock into common stock, shares				(23,100)
Conversion of preferred stock into common stock				$ (19,699,742)
Net issuance of Series H Preferred Stock
Preferred stock, shares issued	23,100				23,100
Preferred stock, components value					$ 19,699,742
Beneficial conversion feature				$ 5,082,000
Series J Convertible Preferred Stock [Member]
Preferred stock, shares issued				20,000
Preferred stock, components value				$ 17,739,996
Issuance of Preferred Stock. shares				10,500	20,000
Issuance of Preferred Stock				$ 6,000,000	$ 20,000,000
Cash paid to B. Riley FBR as placement fee					(525,240)
Legal fees and other costs					(54,764)
Stock issuance cost					(580,004)
Less Liquidated Damages recognized upon issuance					(1,680,000)
Total issuance costs and Liquidated Damages					$ (2,260,004)
Conversion of preferred stock into common stock, shares				(30,500)
Conversion of preferred stock into common stock				$ (23,739,996)
Issuance of preferred stock upon conversion, shares				30,500
Issuance of preferred stock upon conversion				$ 23,739,996
Net issuance of Preferred Stock, shares					15,000
Net issuance of Preferred Stock					$ 15,000,000
shares issued for payment of debt, shares					(5,000)
shares issued for payment of debt					$ (5,000,000)
Payments made to B. Riley FBR from proceeds: Less: placement fee					(525,240)
Net issuance of Series H Preferred Stock					$ 17,739,996
Preferred stock, shares issued					20,000
Preferred stock, components value					$ 17,739,996
Beneficial conversion feature				$ 586,545
Series K Preferred Stock [Member]
Issuance of Preferred Stock. shares				18,042
Issuance of Preferred Stock				$ 18,042,000
Issuance of Preferred Stock on October 23, 2020, shares				6,750
Issuance of Preferred Stock on October 23, 2020				$ 6,750,000
Issuance of Series K Preferred Stock on October 28, 2020, shares				5,292
Issuance of Series K Preferred Stock on October 28, 2020				$ 5,292,000
Issuance of Series K Preferred Stock on November 11, 2020, shares				6,000
Issuance of Series K Preferred Stock on November 11, 2020				$ 6,000,000
Cash paid to B. Riley FBR as placement fee				(440,500)
Legal fees and other costs				(120,000)
Stock issuance cost				(560,500)
Net proceeds received upon issuance of preferred stock			$ 18,042,000	$ 14,675,000
Conversion of preferred stock into common stock, shares				(18,042)
Conversion of preferred stock into common stock				$ (17,481,500)
Issuance of preferred stock upon conversion				$ 17,481,500
Preferred stock, shares issued			18,042
Preferred stock, components value
Beneficial conversion feature				$ 9,472,050