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v3.22.1

Note 13 - Revenue (Details Textual) | 3 Months Ended
--- | ---
Mar. 31, 2022 USD ($)
Deferred Revenue, Revenue Recognized | $ 74,000

X
- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. + References No definition available. + Details
Name: | us-gaap_DeferredRevenueRevenueRecognized1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration