Stockholders’ Equity (Details Narrative) | Mar. 19, 2021USD ($)$ / sharesshares | Dec. 21, 2020shares | Dec. 11, 2020shares | Oct. 30, 2019USD ($)shares | Nov. 09, 2018USD ($)$ / sharesshares | Mar. 19, 2021USD ($)$ / sharesshares | Jul. 31, 2018USD ($)$ / sharesshares | May 31, 2018 | Mar. 31, 2021USD ($)$ / sharesshares | Dec. 31, 2020USD ($)$ / sharesshares | Dec. 31, 2019shares | Apr. 30, 2018shares | Aug. 31, 2015shares | Mar. 31, 2014shares |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock, shares authorized | | | | | | | | | 100,000 | 100,000 | | | | |
Stated value per share | $ / shares | | | | | | | | | $ 0.01 | $ 0.01 | | | | |
Class of Warrant or Right, Outstanding | | | | | | | | | 62,532,312 | | | | | |
Value of stock issued after convertible securities conversion | $ | | | | | | | | | $ 26,000 | | | | | |
Warrants [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Weighted Average Exercise Price | $ / shares | | | | | | | | | $ 0.07 | | | | | |
2020 Term Loan [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Number of shares issued to loan holder | 518,000 | | | | | | | | | | | | | |
Accrued interest | $ | $ 25,900 | | | | | $ 25,900 | | | | | | | | |
Series E Warrants [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Class of Warrant or Right, Outstanding | | | | | | | | | 30,547,267 | | | | | |
Number of shares converted | | | | | | 518,000 | | | | | | | | |
Warrant exercise price shares upon conversion of debt | $ / shares | $ 0.05 | | | | | $ 0.05 | | | | | | | | |
Common stock converted, value | $ | | | | | | $ 25,900 | | | | | | | | |
Warrant [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Adjustable warrants, shares | | | | | | | | | 61,839,829 | | | | | |
Series F Warrants [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Class of Warrant or Right, Outstanding | | | | | | | | | 3,088,500 | | | | | |
Warrant exercise price shares upon conversion of debt | $ / shares | $ 0.05 | | | | | $ 0.05 | | | | | | | | |
Debt Conversion, Converted Instrument, Amount | $ | | | | | | $ 25,900 | | | | | | | | |
Debt Conversion, Converted Instrument, Shares Issued | | | | | | 518,000 | | | | | | | | |
Subscription Agreements [Member] | Warrant [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Warrant exercise price shares upon conversion of debt | $ / shares | | | | | $ 0.55 | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | | | | | 0.75 | | | | | | | | | |
Subscription Agreements [Member] | Warrant [Member] | Private Placement [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Number of shares sold during period | | | | | 73 | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | | | | | 73,000 | | 308,000 | | | | | | | |
Series B Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock designated, shares | | | | | | | | | 1,000 | | | | | |
Series A Junior Participating Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock designated, shares | | | | | | | | | 90,000 | | | | | |
Series C Convertible Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock, shares authorized | | | | | | | | | 1,200 | 1,200 | | | | |
Preferred stock designated, shares | | | | | | | | | | | | | | 1,200 |
Stated value per share | $ / shares | | | | | | | | | $ 0.01 | $ 0.01 | | | | |
Preferred stock, shares outstanding | | | | | | | | | 100 | 100 | | | | |
Series D Convertible Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock, shares authorized | | | | | | | | | 220 | 220 | | | | |
Preferred stock designated, shares | | | | | | | | | | | | | 220 | |
Stated value per share | $ / shares | | | | | | | | | $ 0.01 | $ 0.01 | | | | |
Preferred stock, shares outstanding | | | | | | | | | 40 | 40 | | | | |
Series E Convertible Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock, shares authorized | | | | | | | | | 3,500 | 3,500 | | | | |
Preferred stock designated, shares | | | | | | | | | | | | 3,500 | | |
Stated value per share | $ / shares | | | | | | | | | $ 0.01 | $ 0.01 | | | | |
Preferred stock, shares outstanding | | | | | | | | | 3,458 | 3,458 | | | | |
Number of unregistered shares issued during period | | 121,480 | 121,699 | | | | | | | | | | | |
Number of shares converted | | 10 | 10 | | | | | | | | | | | |
Dividends, Preferred Stock, Cash | $ | | | | | | | | | $ 4,100,000 | $ 3,700,000 | | | | |
Series F Convertible Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock, shares authorized | | | | | | | | | 2,200 | 2,200 | | | | |
Preferred stock designated, shares | | | | | | | 2,200 | | | | | | | |
Stated value per share | $ / shares | | | | | | | | | $ 0.01 | $ 0.01 | | | | |
Preferred stock, shares outstanding | | | | | | | | | 361 | 361 | | | | |
Dividends, Preferred Stock, Cash | $ | | | | | | | | | $ 382,000 | $ 347,000 | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | | | | 150,000 | | | | | | | | | | |
Stock Repurchased During Period, Shares | | | | 20 | | | | | | | | | | |
Stock Repurchased During Period, Value | $ | | | | $ 100,000 | | | | | | | | | | |
Value of warrants held | $ | | | | $ 100,000 | | | | | | | | | | |
Series F Convertible Preferred Stock [Member] | Subscription Agreements [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Common stock at a conversion price, per share | $ / shares | | | | | | | $ 0.50 | | | | | | | |
Preferred stock stated dividend rate | | | | | | | 8.00% | | | | | | | |
Warrant term | | | | | 5 years | | 5 years | | | | | | | |
Number of shares sold during period | | | | | | | 308 | | | | | | | |
Purchase price of preferred stock | $ | | | | | $ 5,000 | | $ 5,000 | | | | | | | |
Warrants term description | | | | | | | five years, | | | | | | | |
Proceeds from Issuance of Private Placement | $ | | | | | | | $ 1,400,000 | | | | | | | |
Placement agent fees and estimated expenses | $ | | | | | | | $ 180,000 | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Period Increase (Decrease), Weighted Average Exercise Price | $ / shares | | | | | | | $ 0.55 | | | | | | | |
Value of stock issued after convertible securities conversion | $ | | | | | $ 310,000 | | | | | | | | | |
Series F Convertible Preferred Stock [Member] | Subscription Agreements [Member] | Warrant [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Warrant exercise price shares upon conversion of debt | $ / shares | | | | | | | $ 0.55 | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | | | | | | | 0.75 | | | | | | | |
Series C Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Stated value per share | $ / shares | | | | | | | | | $ 5,000 | | | | | |
Preferred stock liquidation preference per share | $ / shares | | | | | | | | | $ 5,100 | | | | | |
Preferred Stock, Voting Rights | | | | | | | | | voting rights of 666.67 votes per share | | | | | |
Common stock at a conversion price, per share | $ / shares | | | | | | | | | $ 7.50 | | | | | |
Preferred stock, shares outstanding | | | | | | | | | | 100 | 100 | | | |
Value of stock issued after convertible securities conversion | $ | | | | | | | | | | | | | | |
Series D Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Stated value per share | $ / shares | | | | | | | | | $ 5,000 | | | | | |
Preferred stock liquidation preference per share | $ / shares | | | | | | | | | $ 300 | | | | | |
Preferred Stock, Voting Rights | | | | | | | | | voting rights of 1,250 votes per share | | | | | |
Common stock at a conversion price, per share | $ / shares | | | | | | | | | $ 4 | | | | | |
Preferred stock, shares outstanding | | | | | | | | | | 40 | 40 | | | |
Preferred stock stated dividend rate | | | | | | | | | 5.00% | | | | | |
Value of stock issued after convertible securities conversion | $ | | | | | | | | | | | | | | |
Series E Convertible Preferred Stock and Warrants [Member] | Subscription Agreements [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Preferred stock stated dividend rate | | | | | | | | 8.00% | | | | | | |
Series E Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Deemed dividend | $ | $ 390,000 | | | | | | | | | | | | | |
Value of stock issued after convertible securities conversion | $ | | | | | | | | | | | | | | |
Series E Preferred Stock [Member] | Minimum [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Warrant term | 4 months 28 days | | | | | 4 months 28 days | | | | | | | | |
Series E Preferred Stock [Member] | Maximum [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Warrant term | 5 months 4 days | | | | | 5 months 4 days | | | | | | | | |
Series E Preferred Stock [Member] | Measurement Input, Risk Free Interest Rate [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Fair value of warrants measurement inputs | 0.016 | | | | | 0.016 | | | | | | | | |
Series E Preferred Stock [Member] | Measurement Input, Price Volatility [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Fair value of warrants measurement inputs | 262.27 | | | | | 262.27 | | | | | | | | |
Series F Preferred Stock [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Deemed dividend | $ | $ 31,000 | | | | | | | | | | | | | |
Value of stock issued after convertible securities conversion | $ | | | | | | | | | | | | | | |
Series F Preferred Stock [Member] | Minimum [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Warrant term | 5 months 15 days | | | | | 5 months 15 days | | | | | | | | |
Series F Preferred Stock [Member] | Maximum [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Warrant term | 6 months 10 days | | | | | 6 months 10 days | | | | | | | | |
Series F Preferred Stock [Member] | Measurement Input, Risk Free Interest Rate [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Fair value of warrants measurement inputs | 0.016 | | | | | 0.016 | | | | | | | | |
Series F Preferred Stock [Member] | Measurement Input, Price Volatility [Member] | | | | | | | | | | | | | | |
Class of Stock [Line Items] | | | | | | | | | | | | | | |
Fair value of warrants measurement inputs | 262.27 | | | | | 262.27 | | | | | | | | |