Intangible assets consist mainly of office and administrative software as well as scientific software purchased by the Group.

The following tables show the variations in intangible assets for the years ended December 31, 2018, 2019 and 2020:

Intangible assets—Variations	As of									Translation				As of
(in € thousands)	1/1/2018			Increase			Decrease			adjustments		Reclassification		2018/12/31
Gross
Software		1,900			216			(67	)		—		—		2,049
Patents		21			—			—			—		—		21
Other intangibles		—			313			—			—		—		313
TOTAL - Gross		1,921			529			(67	)		—		—		2,384
Accumulated depreciation and impairment
Software		(1,264	)		(370	)		67			—		—		(1,567	)
Patents		(21	)		—			—			—		—		(21	)
Other intangibles		—			—			—			—		—		—
TOTAL - Accumulated depreciation and impairment		(1,285	)		(370	)		67			—		—		(1,588	)
TOTAL - Net		636			159			—			—		—		796

Intangible assets—Variations	As of									Translation					As of
(in € thousands)	1/1/2019			Increase			Decrease			adjustments		Reclassification			2019/12/31
Gross
Software		2,049			340			(29	)		—		378			2,739
Patents		21			70			—			—		—			91
Other intangibles		313			65			—			—		(378	)		—
TOTAL—Gross		2,384			475			(29	)		—		—			2,830
Accumulated depreciation and impairment
Software		(1,567	)		(350	)		29			—		—			(1,888	)
Patents		(21	)		—			—			—		—			(21	)
Other intangibles		—			—			—			—		—			—
TOTAL - Accumulated depreciation and impairment		(1,588	)		(350	)		29			—		—			(1,910	)
TOTAL - Net		796			125			—			—		—			920

Intangible assets - Variations	As of									Translation					As of
(in € thousands)	1/1/2020			Increase			Decrease			adjustments		Reclassification			2020/12/31
Gross
Software		2,739			231			(691	)		—		(48	)		2,231
Patents		91			—			—			—		—			91
Other intangibles		—			(24	)		(25	)		—		48			—
TOTAL - Gross		2,830			207			(715	)		—		—			2,322
Accumulated depreciation and impairment
Software		(1,888	)		(309	)		688			—		—			(1,510	)
Patents		(21	)		—			—			—		—			(21	)
Other intangibles		—			—			—			—		—			—
TOTAL - Accumulated depreciation and impairment		(1,910	)		(309	)		688			—		—			(1,531	)
TOTAL - Net		920			(102	)		(27	)		—		—			791