Deferred Revenue of Membership Upgrade Sales and Deferred Commission Expense (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Change in Deferred Revenue and Deferred Commissions

The components of the change in deferred revenue entry of membership subscriptions and deferred commission expense were as follows:

	As of
(amounts in thousands)	2020		2019
Deferred revenue - upfront payments from membership upgrade sales as of December 31,	$	126,814	$	116,363
Membership upgrade sales current period, gross	21,739		19,111
Revenue recognized from membership upgrade sales upfront payments	(9,675)		(8,660)
Net increase in deferred revenue - upfront payments from membership grade sales	12,064		10,451
Deferred revenue - upfront payments from membership upgrade sales as of December 31,	$	138,878	$	126,814
Deferred commission expense as of December 31	$	41,149	$	40,308
Deferred commission expense	4,995		4,508
Commission expense recognized	(3,673)		(3,667)
Net increase in deferred commission expense	1,322		841
Deferred commission expense as of December 31,	$	42,471	$	41,149