Stock-Based Compensation - Summary and Changes of Non-Vested Restricted Stock (Details) - Restricted Stock Units (RSUs) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number of RSUs
Number of restricted stock, non-vested balance beginning (in shares)	6,268	17,561
Shares granted (in shares)	23,505	0
Shares vested (in shares)	(4,906)	(7,623)
Shares forfeited (in shares)	(1,181)	(3,670)
Number of restricted stock, non-vested balance ending (in shares)	23,686	6,268
Weighted Average Issuance Price
Exercise price, non-vested balance beginning (in dollars per share)	$ 40.69	$ 47.83
Shares granted - exercise price (in dollars per share)	2.34	0
Shares vested - exercise price (in dollars per share)	43.59	53.92
Shares forfeited - exercise price (in dollars per share)	29.54	47.37
Exercise price, non-vested balance beginning (in dollars per share)	$ 2.59	$ 40.69