Note 17 - Subsequent Events (Details Textual)			9 Months Ended
	Oct. 31, 2021 USD ($)	Oct. 08, 2021 USD ($) ft²	Sep. 30, 2021 USD ($)
Albuquerque, New Mexico Location [Member]
Monthly Base Rent Expense			$ 9,000
Subsequent Event [Member] | Bothell Washington Headquarters 2 [Member]
Area of Leased Real Estate Property Increase (Decrease) (Square Foot) | ft²		8,342
Lease Agreement, Tenant Allowance		$ 417,000
Monthly Base Rent Increase (Decrease)		$ 19,000
Lease Obligation Incurred, Percentage, Annual Increase		3.00%
Subsequent Event [Member] | Albuquerque, New Mexico Location [Member]
Monthly Base Rent Expense	$ 10,000