Share-Based Compensation - Stock Option Activity (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	76,300
Exercised (in shares) | shares	(16,950)
Ending balance (in shares) | shares	59,350
Vested and Expected to Vest, Number of Shares | shares	59,350
Exercisable, Number of Shares | shares	59,350
Weighted-Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 12.40
Exercised (in dollars per share) | $ / shares	8.51
Ending balance (in dollars per share) | $ / shares	13.51
Vested and Expected to Vest, Weighted-Average Exercise Price (in dollars per share) | $ / shares	13.51
Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ / shares	$ 13.51
Weighted Average Remaining Contractual Term
Outstanding	2 years 5 months 12 days
Vested and Expected to Vest	2 years 5 months 12 days
Exercisable	2 years 5 months 12 days
Aggregate Intrinsic Value
Outstanding | $	$ 1,666,694
Vested and Expected to Vest | $	1,666,694
Exercisable | $	$ 1,666,694