Contract Balances (Tables)

6 Months Ended

Jun. 30, 2020

Contract With Customer Asset And Liability [Abstract]

Schedule of Accounts Receivable

Accounts receivable (in thousands) consisted of the following, as of:

	June 30,			December 31,
	2020			2019
Billed and billable	$	125,802		$	165,153
Less: allowance for credit losses		(2,008	)		(1,637	)
Accounts receivable, net	$	123,794		$	163,516

Deferred Revenue and Advance Payments

Deferred revenue and advance payments (in thousands) from customers consisted of the following, as of:

	June 30,		December 31,
	2020		2019
Current:
Deferred product licenses revenue	$	100	$	481
Deferred subscription services revenue		17,934		16,561
Deferred product support revenue		142,543		161,670
Deferred other services revenue		7,066		8,395
Total current deferred revenue and advance payments	$	167,643	$	187,107
Non-current:
Deferred product licenses revenue	$	168	$	293
Deferred subscription services revenue		90		97
Deferred product support revenue		5,152		3,417
Deferred other services revenue		500		537
Total non-current deferred revenue and advance payments	$	5,910	$	4,344