Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Mar. 31, 2021	Mar. 31, 2020
Deferred tax assets:
Accrued liabilities not currently deductible	$ 7,908,000	$ 5,640,000
Allowance for doubtful accounts	849,000	1,293,000
Stock-based compensation	2,242,000	2,058,000
Deferred lease liability	14,080,000	24,765,000
Deferred payroll taxes	2,693,000	0
Other	877,000	938,000
Deferred tax assets	28,649,000	34,694,000
Deferred tax liabilities:
Excess of book over tax basis of fixed assets	(9,166,000)	(13,024,000)
Intangible assets	(4,820,000)	(4,507,000)
Right-of-use asset	(11,668,000)	(22,837,000)
Accrued revenue	(1,526,000)	(1,143,000)
Other	(367,000)	(267,000)
Total deferred tax liabilities	(27,547,000)	(41,778,000)
Valuation allowance	(489,000)	(680,000)
Deferred tax liabilities	(28,036,000)	(42,458,000)
Net deferred tax assets (liabilities)	613,000
Net deferred tax assets (liabilities)	$ 0	$ (7,764,000)