Other Financial Statement Data (Tables)

12 Months Ended

Dec. 31, 2018

OTHER FINANCIAL STATEMENT DATA [Abstract]

Schedule of Inventory Components

Inventories consist of the following:

	December 31,
(In thousands)	2018		2017
Raw materials and purchased parts	$	8,821	$	7,383
Work in process	2,446		1,666
Finished goods	4,896		5,344
Total inventories	$	16,163	$	14,393

Schedule of Equipment and Leasehold Improvements

Equipment and leasehold improvements consist of the following:

	December 31,
(In thousands)	2018			2017
Equipment	$	14,983		$	14,088
Leasehold improvements	2,052			1,688
	17,035			15,776
Accumulated depreciation and amortization	(14,174		)	(13,469		)
	$	2,861		$	2,307

Schedule of Intangible Assets

Intangible assets consist of the following:

	December 31, 2018							December 31, 2017
(In thousands)	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Patents	$	2,754	$	(2,533	)	$	221	$	2,687	$	(2,463	)	$	224
Software		206	(141		)	65		206		(111		)	95
Marketing assets and customer relationships		101	(54		)	47		101		(45		)	56
Non-compete agreements		101	(101		)	—		101		(96		)	5
	$	3,162	$	(2,829	)	$	333	$	3,095	$	(2,715	)	$	380

Schedule of Amortization Expense for Intangible Assets

Amortization expense in 2018 and 2017 was as follows:

	Year Ended December 31,				Weighted Avg. Remaining Life-Years at December 31, 2018
(In thousands)	2018		2017
Patents	$	113	$	112	2.0
Software	30		29		2.2
Marketing assets and customer relationships	9		12		5.2
Non-compete agreements	5		25		-
	$	157	$	178

Schedule of Accrued Expenses

Accrued expenses consist of the following:

	December 31,
(In thousands)	2018		2017
Wages and benefits	$	2,166	$	1,328
Warranty liability	758		713
Income taxes payable	393		26
Other	251		218
	$	3,568	$	2,285

Other Noncurrent Liabilities

Other liabilities consist of the following:

	December 31,
(In thousands)	2018		2017
Deferred rent	$	521	$	—
Warranty liability	31		54
Contract liabilities - Topic 606	73		—
Deferred warranty revenue	4		34
	$	629	$	88

Schedule of Changes in Estimated Warranty Liability

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

	Year Ended December 31,
(In thousands)	2018			2017
Balance at beginning of period	$	767		$	790
Accrual for warranties	619			582
Warranty revision	(34		)	7
Settlements made during the period	(563		)	(612		)
Balance at end of period	789			767
Current portion of estimated warranty liability	(758		)	(713		)
Long-term estimated warranty liability	$	31		$	54

Schedule of Changes in Deferred Warranty Revenue

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

	Year Ended December 31,
(In thousands)	2018			2017
Balance at beginning of period	$	259		$	346
Revenue deferrals	376			357
Amortization of deferred revenue	(417		)	(444		)
Total deferred warranty revenue	218			259
Current portion of deferred warranty revenue	(214		)	(225		)
Long-term deferred warranty revenue	$	4		$	34