XML 38 R28.htm IDEA: XBRL DOCUMENT v3.22.2.2
Note 2 - Supplemental Balance Sheet Information (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Amortization of Intangible Assets $ 23,000 $ 23,000 $ 45,000 $ 45,000
Goodwill and Intangible Asset Impairment, Total 0 0 0 0
Depreciation, Depletion and Amortization, Nonproduction, Total $ 70,000 $ 136,000 $ 180,000 $ 273,000