Preferred Stock (Details) - USD ($)			3 Months Ended		12 Months Ended
	Oct. 01, 2019	Jan. 25, 2018	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 31, 2018
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			5,000,000
Accrued dividends on Series A-2 Preferred Stock			$ 5,000		$ 99,000
Issue of preferred stock in exchange for accrued dividends			$ 98,000	$ 0
Common stock, shares outstanding (in shares)			5,211,543		5,161,543
Common Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)			50,000	43,402
Issuance of restricted stock (in shares)				16,824
Perpetual Series B-1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			100
Preferred stock, shares issued (in shares)			0
Preferred stock, shares outstanding (in shares)			0
Series A-2 Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			7,500		7,500
Preferred stock, shares issued (in shares)			45		32
Preferred stock, shares outstanding (in shares)			45		32
Preferred stock percentage			5.00%
Preferred stock, stated value			$ 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)			10,978
Accrued dividends on Series A-2 Preferred Stock			$ 5,000		$ 99,000
Redemption price per share (in dollars per share)			$ 8,250
Redemption price per share, multiplier (in dollars per share)			$ 7,500
Redemption price per share, multiplier, percentage			110.00%
Preferred stock, convertible, par value (in dollars per share)			$ 0.0001		$ 0.0001
Conversion of convertible preferred stock, shares (in shares)			13
Conversion price below the fair value of common stock (in dollars per share)					$ 11.16
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			2,800
Preferred stock, shares issued (in shares)			0
Preferred stock, shares outstanding (in shares)			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)			1,750.00		1,750
Preferred stock, shares issued (in shares)			325		475
Preferred stock, shares outstanding (in shares)			325		475
Preferred stock percentage			0.00%
Preferred stock, stated value			$ 1,000		$ 1,000
Stock issued during period, conversion of convertible securities, price (in dollars per share)						$ 3.0
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
Series C Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)			150	50	50
Series C Preferred Stock | Common Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)			50,000		16,667
Series D Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			4,000
Preferred stock, shares issued (in shares)			0
Preferred stock, shares outstanding (in shares)			0
Perpetual Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			100
Preferred stock, shares issued (in shares)			0
Preferred stock, shares outstanding (in shares)			0
Series D Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			1,750,000		1,750,000
Preferred stock, shares issued (in shares)			1,720,460		1,734,901
Preferred stock, shares outstanding (in shares)			1,720,460		1,734,901
Preferred stock percentage			6.00%
Preferred stock, stated value	$ 28.50		$ 28.50		$ 28.50
Convertible preferred stock, shares issued upon conversion (in shares)			17,204,600
Preferred stock, convertible, par value (in dollars per share)			$ 0.0001		$ 0.0001
Conversion of convertible preferred stock, shares (in shares)	1,686,659
Conversion price (in dollars per share)	$ 2.85
Series E Preferred Stock
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)			175,000		175,000
Preferred stock, shares issued (in shares)			131,579		131,579
Preferred stock, shares outstanding (in shares)			131,579		131,579
Preferred stock percentage			6.00%
Preferred stock, stated value			$ 28.50		$ 28.50
Convertible preferred stock, shares issued upon conversion (in shares)					1,315,790
Preferred stock, convertible, par value (in dollars per share)			$ 0.0001		$ 0.0001
Restricted Stock | Series D Preferred Stock
Class of Stock [Line Items]
Issuance of restricted stock (in shares)	49,967
Vesting period	2 years
Series E Financing | Series E Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)	1,315,790
Sale fo stock consideration received	$ 3,750,000
Sale of stock, price per share	$ 28.50
Maximum | Series E Financing | Series E Preferred Stock
Class of Stock [Line Items]
Issuance of stock	131,579
Plan
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)			23,731,933