Stock-Based Compensation and Stock Options - Outstanding Options (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Options outstanding, beginning balance, Shares	575,263	706,728	651,857	723,876
Granted, Number of Options	43,000	69,200	59,500	149,400
Exercised, Number of Options	(24,666)	(18,210)	(114,913)	(101,896)
Cancelled - forfeited, Number of Options	(3,523)
Cancelled - expired, Number of Options	0
Options outstanding, ending balance, Shares	590,074	756,462	590,074	756,462
Ending vested and expected to vest, Number of Options	494,068		494,068
Ending exercisable, Number of Options	291,717		291,717
Options outstanding, beginning balance, Weighted Average Exercise Price	$ 116.31	$ 96.14	$ 108.1	$ 84.55
Granted, Weighted Average Exercise Price per Share	200.55	155.99	206.57	155.69
Exercised, Weighted Average Exercise Price per Share	94.78	67.63	79.31	51.17
Cancelled - forfeited, Weighted Average Exercise Price per Share	149.42
Cancelled - expired, Weighted Average Exercise Price per Share	0
Options outstanding, ending balance, Weighted Average Exercise Price	123.15	$ 102.25	123.15	$ 102.25
Ending vested and expected to vest, Weighted Average Exercise Price per Share	119.17		119.17
Ending exercisable, Weighted Average Exercise Price per Share	$ 87.66		$ 87.66
Option outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 2 months 4 days
Ending vested and expected to vest, Weighted Average Remaining Contractual Life (Years)	3 years 2 months 26 days
Ending exercisable, Weighted Average Remaining Contractual Life (Years)	2 years 6 months 21 days
Ending Outstanding Aggregate Intrinsic Value	$ 73,254,040		$ 73,254,040
Ending vested and expected to vest, Aggregate Intrinsic Value	63,310,212		63,310,212
Ending exercisable, Aggregate Intrinsic Value	$ 46,595,645		$ 46,595,645