Contract Balances (Tables)

3 Months Ended

Mar. 31, 2020

Contract With Customer Asset And Liability [Abstract]

Schedule of Accounts Receivable

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

	March 31,			December 31,
	2020			2019
Billed and billable	$	126,971		$	165,153
Less: allowance for credit losses		(2,036	)		(1,637	)
Accounts receivable, net	$	124,935		$	163,516

Deferred Revenue and Advance Payments

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

	March 31,		December 31,
	2020		2019
Current:
Deferred product licenses revenue	$	131	$	481
Deferred subscription services revenue		16,567		16,561
Deferred product support revenue		161,135		161,670
Deferred other services revenue		7,058		8,395
Total current deferred revenue and advance payments	$	184,891	$	187,107
Non-current:
Deferred product licenses revenue	$	262	$	293
Deferred subscription services revenue		84		97
Deferred product support revenue		2,789		3,417
Deferred other services revenue		525		537
Total non-current deferred revenue and advance payments	$	3,660	$	4,344