Note 13 - Business Combination - Pro Forma Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	[1]	Sep. 30, 2020	Sep. 30, 2021	[1]	Sep. 30, 2020
Revenues	$ 1,874		$ 2,127	$ 6,670		$ 5,258
Net income	$ 183		$ 445	$ 1,170		$ 523

[1] Pro forma net income for the three and nine months ended September 30, 2021 excludes $545,000 extinguishment of debt income recorded in September 2021 due to the SBA's forgiveness of ONTA's PPP Loan.