Other Financial Statement Data (Tables)

3 Months Ended

Mar. 31, 2021

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

Inventories consisted of the following:

(In thousands)	March 31, 2021		December 31, 2020
Raw materials and purchased parts	$	12,766	$	11,903
Work in process	3,038		2,459
Finished goods	3,328		4,208
Demonstration inventories, net	1,530		1,701
Total inventories	$	20,662	$	20,271

Schedule of Accrued Liabilities

Accrued expenses consisted of the following:

(In thousands)	March 31, 2021		December 31, 2020
Wages and benefits	$	1,886	$	2,768
Warranty liability	851		793
Income taxes payable	245		269
Other	121		63
Total accrued expenses	$	3,103	$	3,893

Schedule of Changes In Estimated Warranty Liability

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

	Three Months Ended March 31,
(In thousands)	2021			2020
Balance at beginning of period	$	839		$	798
Accrual for warranties	272			230
Warranty revision	(40		)	1
Settlements made during the period	(181		)	(244		)
Balance at end of period	890			785
Current portion of estimated warranty liability	(851		)	(748		)
Long-term estimated warranty liability	$	39		$	37

Schedule Of Changes In Deferred Warranty Revenue

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

	Three Months Ended March 31,
(In thousands)	2021			2020
Balance at beginning of period	$	344		$	275
Revenue deferrals	147			134
Amortization of deferred revenue	(106		)	(100		)
Total deferred warranty revenue	385			309
Current portion of deferred warranty revenue	(281		)	(227		)
Long-term deferred warranty revenue	$	104		$	82