Balance Sheet Details

12 Months Ended

Dec. 31, 2018

7.	Balance Sheet Details:

Inventories

Inventories are comprised of the following:

	December 31,
	2018		2017
Materials	$	61,025	$	39,765
Work-in-process		21,910		20,923
Finished goods		13,885		6,833
Total inventories	$	96,820	$	67,521

The Company has established reserves of $11,678 and $13,035 at December 31, 2018 and 2017, respectively, for slow moving and obsolete inventory. During 2018, the Company recorded a net charge in cost of revenue of $3,042 for the write-down of inventory for excess parts, for older product lines and for parts that were rendered obsolete by design and engineering advancements. In 2018, the Company disposed of $4,398 of inventory. During 2017, the Company recorded a net charge in cost of revenue of $3,833 for the write-down of inventory for excess parts, for older product lines and for parts that were rendered obsolete by design and engineering advancements. In 2017, the Company disposed of $1,343 of inventory.

Property, Plant and Equipment

Property, plant and equipment, net, is comprised of the following:

	December 31,
	2018			2017
Land and building	$	2,584		$	2,584
Machinery and equipment		29,097			29,870
Furniture and fixtures		3,226			3,201
Computer equipment and software		7,906			5,444
Leasehold improvements		9,448			9,472
		52,261			50,571
Accumulated depreciation		(33,387	)		(33,229	)
Total property, plant and equipment, net	$	18,874		$	17,342

Depreciation expense amounted to $4,848, $3,990 and $3,677 for the years ended December 31, 2018, 2017 and 2016, respectively.

Other assets

Other assets is comprised of the following:

	December 31,
	2018		2017
Convertible note receivable	$	5,000	$	—
Other		506		492
Total other assets	$	5,506	$	492

Other current liabilities

Other current liabilities is comprised of the following:

	December 31,
	2018		2017
Contingent consideration - acquisitions	$	1,422	$	634
Customer deposits		1,135		5,561
Accrued inventory		1,103		384
Intangible asset acquisition - Stella Alliance		150		100
Deferred rent		75		151
Other		3,658		2,454
Total other current liabilities	$	7,543	$	9,284

Other non-current liabilities

Other non-current liabilities is comprised of the following:

	December 31,
	2018		2017
Unrecognized tax benefits (including interest)	$	5,409	$	4,660
Contingent consideration - acquisitions		638		1,959
Deferred revenue		1,314		983
Deferred rent		1,405		750
Other		2,395		2,109
Total non-current liabilities	$	11,161	$	10,461