DEFERRED REVENUE

3 Months Ended

Mar. 31, 2021

Revenue From Contract With Customer [Abstract]

Contract With Customer Liability Disclosure [Text Block]

6. DEFERRED REVENUE

A rollforward of current deferred revenue follows.

	Total
	(In thousands)
Current deferred revenue, January 1, 2021	$	9,988
Add: additions		1,273
Less: revenue recognized		(1,244)
Current deferred revenue, March 31, 2021	$	10,017

A rollforward of noncurrent deferred revenue follows.

	Total
	(In thousands)
Noncurrent deferred revenue, January 1, 2021	$	48,250
Add: additions		667
Less: reclassification to current deferred revenue		(1,273)
Noncurrent deferred revenue, March 31, 2021	$	47,644