Preferred Stock (Details) - USD ($)			1 Months Ended	3 Months Ended					9 Months Ended	12 Months Ended
	Oct. 01, 2019	Jan. 25, 2018	Nov. 12, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Dec. 31, 2019	Jan. 31, 2018
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				5,000,000					5,000,000
Accrued dividends on Series A-2 Preferred Stock				$ 4,000					$ 4,000	$ 99,000
Common stock, shares outstanding (in shares)				5,242,558					5,242,558	5,161,543
Common Stock
Class of Stock [Line Items]
Shares issued in conversion (in shares)									15,625
Conversion of convertible preferred stock, shares (in shares)				25,000		50,000		43,402
Issuance of restricted stock (in shares)					23,334		65,000	16,824
Common Stock | Subsequent Event
Class of Stock [Line Items]
Shares issued in conversion (in shares)			18,131
Number of shares issued (in shares)			1,043,000
Sale of stock, price per share (in dollars per share)			$ 2.85
Restricted stock
Class of Stock [Line Items]
Vesting period									10 years
Perpetual Series B-1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				100					100
Preferred stock, shares issued (in shares)				0					0
Preferred stock, shares outstanding (in shares)				0					0
Series A-2 Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				7,500					7,500	7,500
Preferred stock, shares issued (in shares)				45					45	32
Preferred stock, shares outstanding (in shares)				45					45	32
Preferred stock percentage									5.00%
Preferred stock, stated value				$ 7,500					$ 7,500	$ 7,500
Stock issued during period, conversion of convertible securities, price (in dollars per share)				$ 21.60					$ 21.60
Convertible preferred stock, shares issued upon conversion (in shares)				345					345
Accrued dividends on Series A-2 Preferred Stock				$ 4,000					$ 4,000	$ 99,000
Conversion of convertible preferred stock, shares (in shares)									13
Redemption price per share (in dollars per share)				$ 8,250					$ 8,250
Redemption price per share, multiplier (in dollars per share)				$ 7,500					$ 7,500
Redemption price per share, multiplier, percentage				110.00%					110.00%
Conversion price below the fair value of common stock (in dollars per share)									$ 11.16
Preferred stock, convertible, par value (in dollars per share)				$ 0.0001					$ 0.0001	$ 0.0001
Series A-2 Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Stock issued during period, conversion of convertible securities, price (in dollars per share)			$ 18.49
Convertible preferred stock, shares issued upon conversion (in shares)			405
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				2,800					2,800
Preferred stock, shares issued (in shares)				0					0
Preferred stock, shares outstanding (in shares)				0					0
Preferred stock percentage									0.00%
Series B Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)								75
Series C Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				1,750					1,750	1,750
Preferred stock, shares issued (in shares)				250					250	475
Preferred stock, shares outstanding (in shares)				250					250	475
Preferred stock percentage									0.00%
Preferred stock, stated value				$ 1,000					$ 1,000	$ 1,000
Stock issued during period, conversion of convertible securities, price (in dollars per share)											$ 3.00
Proceeds from issuance of preferred stock gross		$ 1,750,000
Preferred stock, convertible, par value (in dollars per share)		$ 1,000		$ 0.0001					$ 0.0001	$ 0.0001
Series C Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)				75		150		50	225	50
Series C Preferred Stock | Common Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)									75,000	16,667
Series D Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				4,000					4,000
Preferred stock, shares issued (in shares)				0					0
Preferred stock, shares outstanding (in shares)				0					0
Perpetual Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				100					100
Preferred stock, shares issued (in shares)				0					0
Preferred stock, shares outstanding (in shares)				0					0
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				1,750,000					1,750,000	1,750,000
Preferred stock, shares issued (in shares)				1,702,010					1,702,010	1,734,901
Preferred stock, shares outstanding (in shares)				1,702,010					1,702,010	1,734,901
Preferred stock percentage									6.00%
Preferred stock, stated value				$ 28.50			$ 2.85		$ 28.50	$ 28.50
Conversion of convertible preferred stock, shares (in shares)									1,686,659
Preferred stock, convertible, par value (in dollars per share)				$ 0.0001					$ 0.0001	$ 0.0001
Series D Preferred Stock | Common Stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)				5,242,558					5,242,558
Series D Preferred Stock | Restricted stock
Class of Stock [Line Items]
Issuance of restricted stock (in shares)	49,967								49,967
Vesting period	2 years
Series E Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)				175,000					175,000	175,000
Preferred stock, shares issued (in shares)				131,579					131,579	131,579
Preferred stock, shares outstanding (in shares)				131,579					131,579	131,579
Preferred stock percentage									6.00%
Preferred stock, stated value				$ 28.50					$ 28.50	$ 28.50
Preferred stock, convertible, par value (in dollars per share)				$ 0.0001					$ 0.0001	$ 0.0001
Series E Preferred Stock | Common Stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)				23,578,448					23,578,448
Series E Preferred Stock | Series E Financing
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)				131,579					131,579
Convertible preferred stock, shares issued upon conversion (in shares)				17,020,100					17,020,100
Sale of stock, price per share (in dollars per share)	$ 2.85
Sale of stock consideration received	$ 3,750,000								$ 3,750,000
Series E Preferred Stock | Series E Financing | Maximum
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)	1,315,790