Preferred Stock (Details) - USD ($)			3 Months Ended			6 Months Ended	12 Months Ended
	Oct. 01, 2019	Jan. 25, 2018	Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 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			$ 8,000			$ 8,000	$ 99,000
Common stock, shares outstanding (in shares)			5,226,879			5,226,879	5,161,543
Common Stock
Class of Stock [Line Items]
Shares issued in conversion (in shares)						15,545
Conversion of convertible preferred stock, shares (in shares)				50,000	43,402
Issuance of restricted stock (in shares)			23,334		16,824
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			$ 8,000			$ 8,000	$ 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 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)			325			325	475
Preferred stock, shares outstanding (in shares)			325			325	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)				150	50	150	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			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)			1,703,096			1,703,096	1,734,901
Preferred stock, shares outstanding (in shares)			1,703,096			1,703,096	1,734,901
Preferred stock percentage						6.00%
Preferred stock, stated value			$ 28.50			$ 28.50	$ 28.50	$ 2.85
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)			5,226,879			5,226,879
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)			23,573,629			23,573,629
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)			17,030,960			17,030,960
Sale fo stock consideration received	$ 3,750,000					$ 3,750,000
Sale of stock, price per share	$ 2.85
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