Note 1 - Significant Accounting Policies - Major Customers (Details)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| US-based IT OEM Company [Member]
U.S.-based IT OEM	95.00%	97.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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