Other Financial Statement Data (Tables)

6 Months Ended

Jun. 30, 2017

Balance Sheet Related Disclosures [Abstract]

Schedule of Inventory Components

The components of our inventories are as follows:

(In thousands)	June 30, 2017		December 31, 2016
Raw materials and purchased parts	$	8,301	$	6,475
Work in process	2,643		826
Finished goods	5,242		4,230
Total inventories	$	16,186	$	11,531

Schedule of Accrued Liabilities

The components of our accrued expenses are as follows:

(In thousands)	June 30, 2017		December 31, 2016
Wages and benefits	$	1,233	$	2,673
Warranty liability	709		717
Other	502		366
	$	2,444	$	3,756

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)	2017			2016
Balance at beginning of period	$	790		$	645
Accrual for warranties	250			447
Warranty revision	(24		)	(25		)
Settlements made during the period	(260		)	(295		)
Balance at end of period	756			772
Current portion of estimated warranty liability	(709		)	(685		)
Long-term estimated warranty liability	$	47		$	87

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)	2017			2016
Balance at beginning of period	$	346		$	199
Revenue deferrals	204			203
Amortization of deferred revenue	(209		)	(226		)
Total deferred warranty revenue	341			176
Current portion of deferred warranty revenue	(300		)	(171		)
Long-term deferred warranty revenue	$	41		$	5