Organization and Significant Accounting Policies - Revenue Recognition and Advertising Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising expense	$ 3.4	$ 2.9	$ 2.7
Subscription and support
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue recognition, customer contract period, min	12 months
Revenue recognition, customer contract period, max	36 months