Other Financial Statement Data (Tables)

6 Months Ended

Jun. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

Inventories consist of the following:

(In thousands)	June 30, 2020		December 31, 2019
Raw materials and purchased parts	$	11,542	$	9,845
Work in process	2,166		1,837
Finished goods	4,770		2,373
Demonstration inventories, net	1,437		1,525
Total inventories	$	19,915	$	15,580

Schedule of Accrued Liabilities

Accrued expenses consisted of the following:

(In thousands)	June 30, 2020		December 31, 2019
Wages and benefits	$	2,232	$	1,319
Warranty liability	729		761
Income taxes payable	144		333
Other	228		159
	$	3,333	$	2,572

Schedule of Changes In Estimated Warranty Liability

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

	Six Months Ended June 30,
(In thousands)	2020			2019
Balance at beginning of period	$	798		$	789
Accrual for warranties	429			450
Warranty revision	9			(22		)
Settlements made during the period	(474		)	(379		)
Balance at end of period	762			838
Current portion of estimated warranty liability	(729		)	(806		)
Long-term estimated warranty liability	$	33		$	32

Schedule Of Changes In Deferred Warranty Revenue

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

	Six Months Ended June 30,
(In thousands)	2020			2019
Balance at beginning of period	$	275		$	218
Revenue deferrals	231			238
Amortization of deferred revenue	(183		)	(224		)
Total deferred warranty revenue	323			232
Current portion of deferred warranty revenue	(209		)	(214		)
Long-term deferred warranty revenue	$	114		$	18