Summary of Significant Accounting Policies - Schedule of Earnings Per Share Basic and Diluted (Detail) - shares	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Basic weighted average shares	17,753,000	17,930,000	18,326,000
Treasury stock impact of stock options	374,000	236,000	276,000
Diluted weighted average shares	18,127,000	18,166,000	18,602,000