Other Financial Statement Data (Tables)

9 Months Ended

Sep. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

Inventories consisted of the following:

(In thousands)	September 30, 2020		December 31, 2019
Raw materials and purchased parts	$	12,428	$	9,845
Work in process	2,236		1,837
Finished goods	5,408		2,373
Demonstration inventories, net	1,213		1,525
Total inventories	$	21,285	$	15,580

Schedule of Accrued Liabilities

Accrued expenses consisted of the following:

(In thousands)	September 30, 2020		December 31, 2019
Wages and benefits	$	2,544	$	1,319
Warranty liability	784		761
Income taxes payable	199		333
Other	158		159
Total accrued expenses	$	3,685	$	2,572

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)	2020			2019
Balance at beginning of period	$	798		$	789
Accrual for warranties	726			713
Warranty revision	(21		)	(7		)
Settlements made during the period	(683		)	(626		)
Balance at end of period	820			869
Current portion of estimated warranty liability	(784		)	(843		)
Long-term estimated warranty liability	$	36		$	26

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)	2020			2019
Balance at beginning of period	$	275		$	218
Revenue deferrals	382			352
Amortization of deferred revenue	(269		)	(335		)
Total deferred warranty revenue	388			235
Current portion of deferred warranty revenue	(274		)	(182		)
Long-term deferred warranty revenue	$	114		$	53