Preferred Stock (Details) - USD ($)			3 Months Ended				9 Months Ended		12 Months Ended
	Jan. 28, 2021	Oct. 01, 2019	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Class of Stock [Line Items]
Preferred stock, convertible, shares authorized (in shares)							5,000,000
Preferred stock designated share							1,941,250
Preferred stock, shares issued (in shares)							0
Preferred stock, shares outstanding (in shares)							0		1,829,582
Accrued dividends on Series A-2 Preferred Stock							$ 0		$ 4,000
Dividends							$ 1,000
Preferred stock conversion	$ 300,000
Conversion of convertible preferred stock, shares (in shares)		1,315,790
Common Stock
Class of Stock [Line Items]
Shares issued in conversion (in shares)	84,292								20,954
Conversion of convertible preferred stock, shares (in shares)				25,000		50,000	18,846,411	75,000
Issuance of restricted stock (in shares)					23,334
Restricted stock
Class of Stock [Line Items]
Vesting period							10 years
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)							0		45
Preferred stock, shares outstanding (in shares)	45						0		45
Preferred stock, stated value							$ 7,500		$ 7,500
Stock issued during period, conversion of convertible securities, price (in dollars per share)	$ 4.00								$ 16.11
Preferred stock percentage			5.00%
Series A-2 Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)			(45)
Series A-2 Preferred Stock | Common Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)									466
Conversion of convertible preferred stock, shares (in shares)			84,292
Series D Convertible Preferred Stock | Common Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)		17,416,939
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)							0		1,697,958
Preferred stock, shares outstanding (in shares)							0		1,697,958
Preferred stock, stated value							$ 28.50		$ 28.50
Shares issued in conversion (in shares)		1,697,022
Preferred stock percentage		6.00%
Conversion of convertible preferred stock, shares (in shares)		1,686,659
Forfeited, restricted shares (in shares)			81						28,618
Series D Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)			855						8,325
Conversion of convertible preferred stock, shares (in shares)			(1,697,022)
Series D Preferred Stock | Restricted stock
Class of Stock [Line Items]
Issuance of restricted stock (in shares)		49,967
Vesting period		2 years
Forfeited, restricted shares (in shares)				1,086			81	32,891
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)							0		131,579
Preferred stock, shares outstanding (in shares)		131,579					0		131,579
Preferred stock, stated value		$ 28.50					$ 28.50		$ 28.50
Shares issued in conversion (in shares)		131,579
Preferred stock percentage		6.00%
Series E Preferred Stock | Preferred Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)			(131,579)
Series E Preferred Stock | Common Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)		1,345,180
Series E Preferred Stock | Series E Financing
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)		131,579
Stock issued during period, conversion of convertible securities, price (in dollars per share)		$ 2.85
Sale of stock consideration received		$ 3,750,000
Sale of stock, price per share (in dollars per share)		$ 2.85