Note 3 - Inventories (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Inventory Abnormal Production Costs	$ 69,000	$ 73,000	$ 122,000	$ 60,000
Non Inventoriable Fixed Costs	$ 0	$ 71,000	$ 83,000	$ 396,000

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