Note 3 - Inventories (Details Textual) - USD ($)	3 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Inventory Abnormal Production Costs	$ 0	$ 0
Non Inventoriable Fixed Costs	$ 35,000	$ 4,000

Represents the amount of abnormal production costs charged to cost of sales.

No definition available.

Name:	cyan_InventoryAbnormalProductionCosts
Namespace Prefix:	cyan_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration