Note 8 - Leases (Details Textual)		1 Months Ended	2 Months Ended	12 Months Ended		24 Months Ended
	Nov. 03, 2021 USD ($) ft²	Dec. 01, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)
Operating Lease, Right-of-Use Asset			$ 654,000	$ 654,000	$ 886,000	$ 654,000
Operating Lease, Liability, Total			$ 728,000	$ 728,000		$ 728,000
Minimum [Member]
Lessee, Operating Lease, Discount Rate			4.00%	4.00%		4.00%
Lessee, Operating Lease, Remaining Lease Term (Year)			2 years	2 years		2 years
Maximum [Member]
Lessee, Operating Lease, Discount Rate			6.00%	6.00%		6.00%
Lessee, Operating Lease, Remaining Lease Term (Year)			3 years	3 years		3 years
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
Lease Agreement for New Corporate Office [Member]
Area of Real Estate Property (Square Foot) | ft²	900
Operating Lease, Monthly Expense	$ 4,425
Operating Lease, Right-of-Use Asset		$ 151,000
Satellite Office in Fairfield, California [Member]
Increase (Decrease) in Operating Lease Right-of-use Asset and Liability					$ (67,000)
Stand-alone Facility in Lima, Peru [Member]
Operating Lease, Monthly Expense				$ 7,800
Operating Lease, Impairment Loss				77,000
Operating Lease, Impairment Loss Recognized				$ 3,000
Increase (Decrease) in Operating Lease Right-of-use Asset and Liability						$ 135,000