Revenue Recognition - Summary of Revenue from Prepaid Gift Cards Expected to be Recognized in Future Related to Performance Obligation Unsatisfied or Partially Satisfied (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, amount		$ 8,020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-10-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, amount	$ 1,303
Revenue, remaining performance obligation, expected timing of satisfaction, period		3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, amount	3,097
Revenue, remaining performance obligation, expected timing of satisfaction, period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, amount	1,649
Revenue, remaining performance obligation, expected timing of satisfaction, period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, amount	993
Revenue, remaining performance obligation, expected timing of satisfaction, period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, amount	692
Revenue, remaining performance obligation, expected timing of satisfaction, period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-01-01
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation, amount	$ 286
Revenue, remaining performance obligation, expected timing of satisfaction, period		1 year