Other Financial Statement Data (Tables)

9 Months Ended

Sep. 30, 2021

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

Inventories consisted of the following:

(In thousands)	September 30, 2021		December 31, 2020
Raw materials and purchased parts	$	15,174	$	11,903
Work in process	1,732		2,459
Finished goods	2,323		4,208
Demonstration inventories, net	1,448		1,701
Total inventories	$	20,677	$	20,271

Schedule of Accrued Liabilities

Accrued expenses consisted of the following: 

(In thousands)	September 30, 2021		December 31, 2020
Wages and benefits	$	3,034	$	2,768
Warranty liability	943		793
Income taxes payable	263		269
Other	113		63
Total accrued expenses	$	4,353	$	3,893

Schedule of Changes In Estimated Warranty Liability

A reconciliation of the changes in our estimated warranty liability is as follows:

	Nine Months Ended September 30,
(In thousands)	2021			2020
Balance at beginning of period	$	839		$	798
Accrual for warranties	814			726
Warranty revision	(54		)	(21		)
Settlements made during the period	(599		)	(683		)
Balance at end of period	1,000			820
Current portion of estimated warranty liability	(943		)	(784		)
Long-term estimated warranty liability	$	57		$	36

Schedule of Changes In Deferred Warranty Revenue

A reconciliation of the changes in our deferred warranty revenue is as follows:

	Nine Months Ended September 30,
(In thousands)	2021			2020
Balance at beginning of period	$	344		$	275
Revenue deferrals	417			382
Amortization of deferred revenue	(348		)	(269		)
Total deferred warranty revenue	413			388
Current portion of deferred warranty revenue	(298		)	(274		)
Long-term deferred warranty revenue	$	115		$	114