Inventory - Summary of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials	$ 966	$ 67
Goods in process	1,921	188
Finished goods	4,410	1,903
Inventories	$ 7,297	$ 2,158

Inventory goods ion process current and non current.

No definition available.

Name:	rkda_InventoryGoodsInProcessCurrentAndNonCurrent
Namespace Prefix:	rkda_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant