Share-Based Compensation - Restricted Shares Rollforward (Details) - Restricted Shares	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Numbers of Shares
Outstanding at the beginning of the year (in shares) | shares	75,000
Granted (in shares) | shares	0
Vested (in shares) | shares	(75,000)
Forfeited (in shares) | shares	0
Outstanding at the end of the year (in shares) | shares	0
Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the year (in dollars per share) | $ / shares	$ 2.27
Granted (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	2.27
Forfeited (in dollars per share) | $ / shares	0
Outstanding at the end of the year (in dollars per share) | $ / shares	$ 0