Share-Based Compensation - Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	45,800
Exercised (in shares) | shares	(17,300)
Ending balance (in shares) | shares	28,500
Vested and expected to vest (in shares) | shares	28,500
Exercisable (in shares) | shares	28,500
Weighted-Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 15.00
Exercised (in dollars per share) | $ / shares	11.46
Ending balance (in dollars per share) | $ / shares	17.14
Vested and expected to vest, weighted-average exercise price (in dollars per share) | $ / shares	17.14
Exercisable, weighted-average exercise price (in dollars per share) | $ / shares	$ 17.14
Weighted Average Remaining Contractual Term (in Years)
Outstanding	1 year 9 months
Vested and expected to vest	1 year 9 months
Exercisable	1 year 9 months
Aggregate Intrinsic Value
Outstanding | $	$ 703,905
Vested and expected to vest | $	703,905
Exercisable | $	$ 703,905