Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Contract With Customer, Liability, Current [Roll Forward]
Deferred revenue, beginning balance	$ 3,200	$ 0	$ 0
Deferred memberships fees received			579	$ 0
Deferred revenue, ending balance	3,573	3,200	3,573
PetCareRx
Contract With Customer, Liability, Current [Roll Forward]
Deferred revenue acquired with PetCareRx		3,000
Membership fees
Contract With Customer, Liability, Current [Roll Forward]
Deferred memberships fees received	2,100	2,000
Deferred membership fee revenue recognized	$ (1,700)	$ (1,800)	$ (3,500)