17.

Intangible assets


	Goodwill			Mineral licenses			Other intangible assets
Cost
At December 31, 2015		32,995			55,783			—

Exchange differences		(93	)		—			—

At December 31, 2016		32,902			55,783			—

Additions		—			—			880
Disposal		—			(165	)		—
Exchange differences		(24	)		—			—

At December 31, 2017		32,878			55,618			880

Additions		—			—			—
Disposal		—			—			—
Exchange differences		90			—			—

At December 31, 2018		32,968			55,618			880

Amortisation and impairment
At December 31, 2015		(11,617	)		(17,266	)		—

Impairment		(2,930	)		(572	)		—
Amortisation		—			(1,846	)		—
At December 31, 2016		(14,547	)		(19,684	)		—

Impairment		—			(1,190	)		—
Amortisation		—			(1,504	)		—
At December 31, 2017		(14,547	)		(22,378	)		—

Impairment		(2,382	)		—			—
Amortisation		—			(1,172	)		(36	)
Disposal		—			—			—
Exchange differences		—			—			—

At December 31, 2018		(16,929	)		(23,550	)		(36	)

Net book value
At December 31, 2015		21,378			38,517			—

At December 31, 2016		18,355			36,099			—

At December 31, 2017		18,331			33,240			880

At December 31, 2018		16,039			32,068			844

In December 2017, the Group acquired the rights to connect to the power grid for providing the SKCC’s power receiving equipment with an additional power capacity. These rights are recorded as other intangible assets of mining segment with a useful life of 25 years.

As of December 31, 2018 and 2017, the Group performed an impairment analysis of goodwill (Note 18).

As of December 31, 2018 and 2017, the total Group’s contractual commitments to acquire intangible assets excluding VAT amounted to RUB 110 million and RUB 134 million, respectively.