XML 87 R74.htm IDEA: XBRL DOCUMENT v3.20.2
Note 13 - Segment Reporting - Summary of Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Balance at beginning of period $ 131 $ 132
Charged to costs and expenses 85 (1)
Write-offs during period 0 0
Balance at end of period $ 216 $ 131