Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Contract Assets and Contract Liabilities

The changes in our contract assets are as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Beginning of period balance	$	4,603	$	4,932	$	4,306	$	4,578
Commission costs and upfront payments to a customer capitalized in period	1,051		657		2,157		1,822
Amortization of contract assets	(883)		(871)		(1,692)		(1,682)
End of period balance	$	4,771	$	4,718	$	4,771	$	4,718

The changes in our contract liabilities are as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Beginning of period balance	$	13,656	$	12,102	$	12,529	$	10,498
Revenue deferred in period	3,648		2,173		7,449		5,693
Revenue recognized from amounts included in contract liabilities	(2,285)		(2,738)		(4,959)		(4,654)
End of period balance	$	15,019	$	11,537	$	15,019	$	11,537