Other Financial Statement Data (Tables)

9 Months Ended

Sep. 30, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventories

Inventories consist of the following:

(In thousands)	September 30, 2019		December 31, 2018
Raw materials and purchased parts	$	10,352	$	8,821
Work in process	1,426		2,446
Finished goods	4,582		4,896
Total inventories	$	16,360	$	16,163

Schedule of Accrued Liabilities

Accrued expenses consist of the following:

(In thousands)	September 30, 2019		December 31, 2018
Wages and benefits	$	1,038	$	2,166
Warranty liability	843		758
Income taxes payable	257		393
Other	212		251
	$	2,350	$	3,568

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)	2019			2018
Balance at beginning of period	$	789		$	767
Accrual for warranties	713			399
Warranty revision	(7		)	(30		)
Settlements made during the period	(626		)	(368		)
Balance at end of period	869			768
Current portion of estimated warranty liability	(843		)	(713		)
Long-term estimated warranty liability	$	26		$	55

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)	2019			2018
Balance at beginning of period	$	218		$	259
Revenue deferrals	352			289
Amortization of deferred revenue	(335		)	(310		)
Total deferred warranty revenue	235			238
Current portion of deferred warranty revenue	(182		)	(228		)
Long-term deferred warranty revenue	$	53		$	10