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Discontinued operations - Narrative (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 14, 2020	Dec. 31, 2021	Dec. 31, 2020
Disclosure on Sale of Assets [Line Items]
Gain (loss) on sale of assets		$ 0	$ 168
Unmanned Aerial Vehicle (UAV) Business Assets | Discontinued operations
Disclosure on Sale of Assets [Line Items]
Total proceeds	$ 1,000
Cash proceeds received on sale, net	988
Gain (loss) on sale of assets	$ 168

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- Definition

The gain (loss) recognised on the measurement to fair value less costs to sell or on the disposal of the assets or disposal group(s) constituting the discontinued operation. [Refer: Discontinued operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The portion of consideration paid or received, consisting of cash and cash equivalents, in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Subsidiaries [member]; Cash and cash equivalents; Consideration paid (received)]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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