Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2020

Deferred Revenues Disclosure [Abstract]

Schedule of disaggregated revenue

	Six months ended June 30,
	2019		2020
	Total
	Unaudited
Type of contract
T&M contracts	$	89,706	$	119,594
Fixed-priced contracts		66,610		64,003
Total		156,316		183,597
Timing of revenue recognition
Products transferred at a point in time		5,003		5,200
Products and services transferred over time		151,313		178,397
Total	$	156,316	$	183,597

Schedule of trade receivables, contract assets and contract liabilities from contracts with customers

	December 31, 2019		June 30, 2020
			Unaudited
Trade receivables		34,615		45,943
Contract assets *)		6,095		6,161
Short-term unbilled receivables **)		9,511		10,865
Long-term unbilled receivables **)		362		782
Deferred revenues (short-term contract liabilities)		21,021		25,061
Long-term deferred revenues (long-term contract liabilities) ***)		216		-

(*) Contract assets relate to unbilled receivables, which represent revenue recognized on arrangements for which billings have not yet been presented to customers because the amounts were earned but not contractually billable as of the balance sheet date, and the right to consideration is generally subject to milestone completion, client acceptance or factors other than the passage of time.

(**) Unbilled receivables relate to revenue recognized in excess of amounts invoiced as the Company has an unconditional right to invoice and receive payment in the future related to its fulfilled obligations.

***) Included in other long-term liabilities in the consolidated balance sheets