Note 7 - Property, Plant and Equipment, Net (Details Textual) - USD ($)
$ in Millions
|3 Months Ended|
Mar. 31, 2023
Mar. 31, 2022
|Depreciation||$ 0.1||$ 0.1|
The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef