INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2020

Intangible Assets Net Excluding Goodwill [Abstract]

Intangible assets consisted of the following items as of the dates indicated (in thousands):

	Trade name / trademark *			Core technology			Customer relationships			Patents and Other			Total
Gross Carrying Amount	$	12,311		$	13,356		$	25,608		$	312		$	51,587
Accumulated Amortization/Impairment		(1,704	)		(13,014	)		(22,240	)		(312	)		(37,270	)
Balance as of January 1, 2020	$	10,607		$	342		$	3,368		$	—		$	14,317

Gross Carrying Amount	$	12,305		$	13,315		$	25,566		$	312		$	51,498
Accumulated Amortization/Impairment		(1,698	)		(13,119	)		(22,433	)		(312	)		(37,562	)
Balance as of March 31, 2020	$	10,607		$	196		$	3,133		$	—		$	13,936

*	Included in the tradename/trademark line above is the Rosetta Stone tradename, which is the Company's only indefinite-lived intangible asset. As of January 1, 2020 and March 31, 2020, the Rosetta Stone tradename comprised the entire tradename/trademark net carrying amount of $10.6 million.

Schedule of Intangible Asset Amortization Expense

The following table presents amortization of intangible assets included in the related financial statement line items during the respective periods (in thousands):

	Three months ended March 31,
	2020		2019
Cost of revenue	$	146	$	146
Sales and marketing		235		235
Research and development		—		7
General and administrative		—		—
Total intangible amortization expense	$	381	$	388

Summary of the Estimated Future Amortization Expense

The following table summarizes the estimated future amortization expense related to intangible assets for the remaining months of 2020 and years thereafter (in thousands):

	As of March 31, 2020
2020 - remaining	$	901
2021		940
2022		940
2023		548
2024		—
Thereafter		—
Total	$	3,329