Subsequent Event - Hale Warrant Exercise (Details) - USD ($)	Jan. 12, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 21, 2016
Subsequent Event [Line Items]
Warrant shares (in shares)		414,286	1,339,286
Hale Capital, LLP
Subsequent Event [Line Items]
Warrant shares (in shares)		314,286	314,286
Warrant, exercise price (in dollars per share)				$ 2.80
Subsequent Event | Hale Capital, LLP
Subsequent Event [Line Items]
Warrant shares (in shares)	238,583
Warrant, exercise price (in dollars per share)	$ 2.80
Shares issued Class of Warrant or Right, Shares Issued Upon Exercise	50,000
Class of Warrant or Right, Warrant Shares Exercised	75,703
Class of Warrant or Right, Fair Value of Warrant Shares Exercised	$ 561,000