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Revenue and Related Matters - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 07, 2021	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Contract with customer, liability, revenue recognized		$ 18,500,000	$ 11,900,000
Revenue recognized due to termination of contract	$ 2,500,000
Revenue, remaining performance obligation, amount		37,700,000
iController BV
Disaggregation of Revenue [Line Items]
Deferred revenue					$ 3,775,000
Accounts receivable					$ 1,217,000
Commissions
Disaggregation of Revenue [Line Items]
Capitalized costs amortized		2,600,000	2,100,000	$ 1,700,000
Capitalized contract cost, impairment loss		0	0	0
Implementation Costs
Disaggregation of Revenue [Line Items]
Capitalized costs amortized		3,400,000	5,800,000	6,100,000
Capitalized contract cost, impairment loss		$ 0	$ 0	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, percentage						96.00%
Revenue, remaining performance obligation, expected timing of satisfaction, period						36 months