Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets:
Accrued liabilities not currently deductible	$ 5,640,000	$ 6,277,000
Allowance for doubtful accounts	1,293,000	1,422,000
Stock-based compensation	2,058,000	1,833,000
Accrued rent	0	1,474,000
Deferred lease liability	24,765,000	0
Other	938,000	1,123,000
Deferred tax assets	34,694,000	12,129,000
Deferred tax liabilities:
Excess of book over tax basis of fixed assets	(13,024,000)	(10,836,000)
Intangible assets	(4,507,000)	(4,438,000)
Right-of-use asset	(22,837,000)	0
Accrued revenue	(1,143,000)	(2,354,000)
Other	(267,000)	(242,000)
Total deferred tax liabilities	(41,778,000)	(17,870,000)
Valuation allowance	(680,000)	(553,000)
Deferred tax liabilities	(42,458,000)	(18,423,000)
Net deferred tax liability	$ (7,764,000)	$ (6,294,000)