Summary of Significant Accounting Policies - Intangible Assets (Details)	12 Months Ended
	Mar. 31, 2023 USD ($) states reporting_unit	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Feb. 24, 2022 USD ($)	Mar. 31, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units | reporting_unit	1
Share Repurchases [Abstract]
Amount authorized for repurchase				$ 30,000,000
Amount remaining for repurchase	$ 1,100,000
Amount outstanding	595,300,000
Unamortized debt issuance costs	3,500,000
Stockholders' equity	$ 385,226,737	$ 373,024,428	$ 404,927,441		$ 411,963,067
Debt to equity ratio	1.6
Concentration of Risk [Abstract]
Number of states in which entity operates | states	16
Number of states with largest concentration of revenue | states	4
Advertising	$ 6,096,083	18,298,212	$ 17,190,676
Accounts Receivable | Geographic Concentration Risk | 4 Largest States
Concentration of Risk [Abstract]
Concentration risk percentage	52.00%
Customer lists
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)	9 years 4 months 24 days
Customer lists | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)	8 years
Customer lists | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)	23 years
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)	4 years 8 months 12 days
Noncompete Agreements | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)	3 years
Noncompete Agreements | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life (in years)	5 years 3 months 18 days
Senior notes payable
Finite-Lived Intangible Assets [Line Items]
Debt issuance costs	$ 1,200,000	700,000
Unsecured Debt
Finite-Lived Intangible Assets [Line Items]
Debt issuance costs	$ 3,500,000	$ 4,600,000