Summary of Significant Accounting Policies and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Activity in Allowance for Doubtful Accounts

Activity in the allowance for doubtful accounts was as follows:

	December 31,
	2018			2017
Balance at beginning of year	$	973		$	1,391
Additions charged to costs		1,005			1,239
Recoveries recognized in costs		(1,006	)		(1,708	)
Reclassified to assets held for sale		(96	)		—
Adjustment due to currency translation		(25	)		51
Balance at end of year	$	851		$	973

Reconciliation of Changes in Inventory Reserve

The Company’s inventory is measured at the lower of cost or market, with cost being determined using the first-in first-out basis. Raw materials, consumables and commodities are measured at cost of purchase and unfinished and finished goods are measured at cost of production, using the weighted average method. If the net realizable value expected on the reporting date is below cost, a write-down is recorded to adjust inventory to its net realizable value. We recognize a reserve for obsolete and slow moving inventories based on estimates of future sales and an inventory item’s capacity to be repurposed for a different use. We consider the number of months supply on hand based on current planned requirements, uncommitted future projections and historical usage in estimating the inventory reserve.  Additional provisions are made for supplier claims for obsolete materials, prototype inventory, spare or customer service inventory and, for all periods other than at year-end, estimates for physical inventory adjustments.

Note 2 — Summary of Significant Accounting Policies and Basis of Presentation – (Continued)

The following is a reconciliation of the changes in the inventory reserve:

	December 31,
	2018			2017
Balance at beginning of year	$	7,887		$	4,790
Expense		2,712			3,521
Inventory write off		(3,282	)		(726	)
Reclassified to assets held for sale		(899	)		—
Adjustment due to currency translation		(148	)		302
Balance at end of year	$	6,270		$	7,887

Estimated Useful Lives of Property and Equipment

Depreciation and amortization are computed using the straight-line method. The estimated useful lives of the Company’s property and equipment are as follows:

Asset Category	Useful Life
Buildings and building improvements	2 to 50 years
Plant and Equipment	1 to 20 years
Production tooling	2 to 7 years
Leasehold improvements	Term of lease
Computer equipment and software	1 to 10 years
Capital Leases	Term of lease

Fair Value and Corresponding Useful Lives for Acquired Intangibles Assets

The fair value and corresponding useful lives for acquired intangible assets are listed below as follows:

Asset Category	Useful Life
Customer relationships	8-15 years
Technology	2-10 years
Production Development Costs	5-10 years

Roll Forward of Goodwill from Acquisition

A roll forward of goodwill from December 31, 2016 to December 31, 2018 is as follows:

December 31, 2016	$	51,735
Goodwill arising from the acquisition of Etratech		14,881
Exchange rate impact		3,069
December 31, 2017	$	69,685
Reclassification to assets held for sale		(6,844	)
Impairment of goodwill		(6,151	)
Exchange rate impact		(1,379	)
December 31, 2018	$	55,311

Reconciliation of Changes in Accrued Warranty Costs

The following is a reconciliation of the changes in accrued warranty costs for the reporting period:

	December 31,
	2018			2017
Balance at beginning of year	$	5,382		$	5,443
Warranty claims paid		(905	)		(979	)
Warranty expense for products shipped during the current period		2,678			3,162
Adjustments to warranty estimates from prior periods		(608	)		(2,655	)
Reclassification to liabilities held for sale		(1,884	)		—
Adjustment due to currency translation		(149	)		411
Balance at end of year	$	4,514		$	5,382

W.E.T

Estimate of Total Intangible Asset Amortization

An estimate of intangible asset amortization by year, is as follows:

2019	$	10,464
2020		8,710
2021		7,887
2022		7,853
2023		7,853
Thereafter		13,619