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INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of United States and Foreign Income (Loss) Before Income Taxes and Minority Interest

United States and foreign income (loss) before income taxes and minority interest were as follows:

		Years Ended December 31,
		2021				2020				2019
United States		$	(961	)		$	(13,225	)		$	6,647
Foreign			(1,573	)			(12,233	)			(10,591	)
		$	(2,534	)		$	(25,458	)		$	(3,944	)

Schedule of Components of the (Expense) Benefit for Income Taxes

		Years Ended December 31,
		2021				2020				2019
		(in thousands)
Current
Federal		$	(42	)		$	1			$	(984	)
State			—				—				—
Foreign			1,284				1,044				150
Total current income tax expense (benefit)		$	1,242			$	1,045			$	(834	)
Deferred
Federal			—				—				—
State			—				—				—
Foreign			2,052				(2,827	)			803
Total deferred tax expense (benefit)		$	2,052			$	(2,827	)		$	803
Total income tax expense (benefit)		$	3,294			$	(1,782	)		$	(31	)

Summary of Unrecognized Tax Benefits

		Years Ended December 31,
		2021				2020				2019
Beginning balance-gross unrecognized tax benefits (UTB’s)		$	3,404			$	15,507			$	17,496
Lapse of statute of limitations			—				—				(291	)
Tax credit expiration			(160	)			(12,103	)			—
Rate change impact			—				—				(1,698	)
Ending balance—UTB			3,244				3,404				15,507
UTB’s as a credit in deferred taxes			(2,347	)			(2,347	)			(12,905	)
Federal benefit of state taxes			(356	)			(516	)			(2,062	)
UTB’s that would impact the effective tax rate		$	541			$	541			$	540

Summary of the Components of Net Deferred Tax Assets

		December 31,				December 31,
		2021				2020
Deferred Tax Assets
Allowance and reserves		$	3,811			$	5,681
Prepaid expense			—				93
Net operating loss carryforward			167,844				166,297
Tax credit carryforwards			6,451				6,881
Writedown/amortization of intangible assets and goodwill			—				1
Property, plant and equipment			396				815
Stock-based compensation			29				74
Accrued warranties			12				12
Other			14,052				13,874
Total deferred tax assets			192,595				193,728
Deferred Tax Liabilities
Deferred revenue and customer advances, net			(88	)			(204	)
Prepaid expense			(42	)			—
Total deferred tax liabilities			(130	)			(204	)
Total net deferred tax assets			192,465				193,524
Less: Valuation allowance			(190,334	)			(189,253	)
Total net deferred tax assets		$	2,131			$	4,271

Schedule of Reconciliation of Effective Income Tax Amount and the Federal Statutory Amount

		Years Ended December 31,
		2021				2020				2019
Federal tax (benefit) at statutory rate		$	(532	)		$	(5,388	)		$	(858	)
Stock compensation expense			68				148				132
Effect of differences in foreign tax rates			1,715				(1,408	)			547
ASC 740-10 reserve			(21	)			22				(349	)
Change in deferred tax valuation allowance			1,273				4,334				1,107
Other			791				510				(610	)
Total Tax Expense (Benefit)		$	3,294			$	(1,782	)		$	(31	)

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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