Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Mar. 31, 2023	Mar. 31, 2022
Deferred tax assets:
Accrued liabilities not currently deductible	$ 6,885,000	$ 6,277,000
Allowance for doubtful accounts	736,000	658,000
Stock-based compensation	2,423,000	2,090,000
Deferred lease liability	8,740,000	11,002,000
Deferred payroll taxes	0	1,332,000
Capitalized research and development expenditures	2,495,000	0
Other	536,000	675,000
Deferred tax assets	21,815,000	22,034,000
Deferred tax liabilities:
Excess of book over tax basis of fixed assets	(6,654,000)	(7,313,000)
Intangible assets	(5,057,000)	(4,937,000)
Right-of-use asset	(7,190,000)	(8,939,000)
Accrued revenue	(1,851,000)	(1,665,000)
Other	(508,000)	(476,000)
Total deferred tax liabilities	(21,260,000)	(23,330,000)
Valuation allowance	(331,000)	(393,000)
Deferred tax liabilities	(21,591,000)	(23,723,000)
Net deferred tax assets (liabilities)	$ 224,000	$ 1,689,000