Note 12 - Operating Leases (Details Textual)		1 Months Ended	2 Months Ended	12 Months Ended
	Nov. 03, 2021 USD ($) ft²	Dec. 01, 2021 USD ($)	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2020 USD ($)
Operating Lease, Expense				$ 377,000	$ 404,000
Lease Agreement for New Corporate Office [Member]
Area of Real Estate Property (Square Foot) | ft²	900
Operating Lease, Monthly Expense	$ 4,425
Sublease Office in San Francisco, California [Member]
Area of Real Estate Property (Square Foot) | ft²	3,253
Operating Lease, Monthly Expense	$ 21,370
Lessee, Operating Sublease, Monthly Income	$ 15,723
Operating Lease, Impairment Loss		$ 77,000
Operating Lease, Impairment Loss Recognized			$ 3,000
Stand-alone Facility in Lima, Peru [Member]
Operating Lease, Monthly Expense				$ 7,800
Area of Land (Square Foot) | ft²			1,600	1,600
Operating Lease, Impairment Loss				$ 77,000
Operating Lease, Impairment Loss Recognized				$ 3,000