Stock Based Compensation - Exercise Price Range (Details) - $ / shares	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of Options, Outstanding and Exercisable (in shares)	107,500	107,500	215,345
Weighted Average Remaining Contractual Life (In Years)	1 year 9 months 3 days
Weighted Average Exercise Price, Outstanding and Exercisable (in dollars per share)	$ 19.64	$ 19.64	$ 12.27
$0.00 – $10.00
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of price, lower range limit (in dollars per share)	0.00
Range of price, upper range limit (in dollars per share)	$ 10.00
Number of Options, Outstanding and Exercisable (in shares)	2,500
Weighted Average Remaining Contractual Life (In Years)	2 years 2 months 12 days
Weighted Average Exercise Price, Outstanding and Exercisable (in dollars per share)	$ 9.00
$10.01 – $20.00
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of price, lower range limit (in dollars per share)	10.01
Range of price, upper range limit (in dollars per share)	$ 20.00
Number of Options, Outstanding and Exercisable (in shares)	97,500
Weighted Average Remaining Contractual Life (In Years)	1 year 9 months 21 days
Weighted Average Exercise Price, Outstanding and Exercisable (in dollars per share)	$ 19.32
$20.01 – $30.00
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of price, lower range limit (in dollars per share)	20.01
Range of price, upper range limit (in dollars per share)	$ 30.00
Number of Options, Outstanding and Exercisable (in shares)	2,500
Weighted Average Remaining Contractual Life (In Years)	1 year 2 months 8 days
Weighted Average Exercise Price, Outstanding and Exercisable (in dollars per share)	$ 21.80
$30.01 – $40.00
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of price, lower range limit (in dollars per share)	30.01
Range of price, upper range limit (in dollars per share)	$ 40.00
Number of Options, Outstanding and Exercisable (in shares)	5,000
Weighted Average Remaining Contractual Life (In Years)	11 months 15 days
Weighted Average Exercise Price, Outstanding and Exercisable (in dollars per share)	$ 30.20