REVENUES (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Reconciliation of Disaggregation of Revenue

The following tables provide information about disaggregated revenue and a reconciliation of the disaggregated revenue during the years ended December 31, 2021 and 2020:

	Year Ended December 31, 2021
	Launch		Space
	Services		Systems		Total
Revenues by recognition model
Point-in-time	$	36,576	$	12,578	$	49,154
Over-time		2,395		10,688		13,083
Total revenue by recognition model	$	38,971	$	23,266	$	62,237

	Year Ended December 31, 2020
	Launch		Space
	Services		Systems		Total
Revenues by recognition model
Point-in-time	$	31,993	$	1,910	$	33,903
Over-time		1,092		165		1,257
Total revenue by recognition model	$	33,085	$	2,075	$	35,160

Balances Related to Enforceable Contracts

The following table presents the balances related to enforceable contracts as of December 31, 2021 and 2020:

	December 31,
	2021		2020
Contract balances
Accounts receivable	$	13,957	$	2,730
Contract assets		2,490		2,045
Contract liabilities		59,749		26,132

Changes in Contract Liabilities

Changes in contract liabilities were as follows:

	2021			2020
Contract liabilities, beginning of year	$	26,132		$	10,211
Contract liabilities assumed at acquisition		5,560			—
Customer advances received		41,614			24,694
Recognition of unearned revenue		(13,557	)		(8,773	)
Contract liabilities, end of year	$	59,749		$	26,132