Stock-Based Compensation and Stock Options - Outstanding Options (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Options outstanding, beginning balance, Shares	706,728	778,982	723,876	937,158
Granted, Number of Options	69,200	50,200	149,400	110,450
Exercised, Number of Options	(18,210)	(25,917)	(101,896)	(212,588)
Cancelled - forfeited, Number of Options	(1,225)
Cancelled - expired, Number of Options	(31)
Options outstanding, ending balance, Shares	756,462	796,858	756,462	796,858
Ending vested and expected to vest, Number of Options	662,773		662,773
Ending exercisable, Number of Options	337,559		337,559
Options outstanding, beginning balance, Weighted Average Exercise Price	$ 96.14	$ 72.17	$ 84.55	$ 64.28
Granted, Weighted Average Exercise Price per Share	155.99	197.16	155.69	163.54
Exercised, Weighted Average Exercise Price per Share	67.63	62.78	51.17	53.27
Cancelled - forfeited, Weighted Average Exercise Price per Share	121.76
Cancelled - expired, Weighted Average Exercise Price per Share	121.96
Options outstanding, ending balance, Weighted Average Exercise Price	102.25	$ 80.27	102.25	$ 80.27
Ending vested and expected to vest, Weighted Average Exercise Price per Share	99.55		99.55
Ending exercisable, Weighted Average Exercise Price per Share	$ 70.05		$ 70.05
Option outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 3 months 25 days
Ending vested and expected to vest, Weighted Average Remaining Contractual Life (Years)	3 years 4 months 2 days
Ending exercisable, Weighted Average Remaining Contractual Life (Years)	2 years 6 months 14 days
Ending Outstanding Aggregate Intrinsic Value	$ 36,912,256		$ 36,912,256
Ending vested and expected to vest, Aggregate Intrinsic Value	33,500,567		33,500,567
Ending exercisable, Aggregate Intrinsic Value	$ 25,647,949		$ 25,647,949