Other Financial Statement Data (Tables)

3 Months Ended

Mar. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

Inventories consist of the following:

(In thousands)	March 31, 2020		December 31, 2019
Raw materials and purchased parts	$	10,556	$	9,845
Work in process	2,055		1,837
Finished goods	3,055		2,373
Demonstration inventories, net	1,384		1,525
Total inventories	$	17,050	$	15,580

Schedule of Accrued Liabilities

Accrued expenses consist of the following:

(In thousands)	March 31, 2020		December 31, 2019
Wages and benefits	$	1,487	$	1,319
Warranty liability	748		761
Income taxes payable	219		333
Other	105		159
	$	2,559	$	2,572

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)	2020			2019
Balance at beginning of period	$	798		$	789
Accrual for warranties	230			174
Warranty revision	1			17
Settlements made during the period	(244		)	(154		)
Balance at end of period	785			826
Current portion of estimated warranty liability	(748		)	(795		)
Long-term estimated warranty liability	$	37		$	31

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)	2020			2019
Balance at beginning of period	$	275		$	218
Revenue deferrals	134			87
Amortization of deferred revenue	(100		)	(114		)
Total deferred warranty revenue	309			191
Current portion of deferred warranty revenue	(227		)	(186		)
Long-term deferred warranty revenue	$	82		$	5