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Note 10 - Revenues and Other Related Items - Deferred Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Balance, current $ 1,566 $ 1,793 $ 2,097
Balance, noncurrent 398 395 418
Increase (decrease) 237 (227) (304)
Increase (decrease) 13 3 (23)
Balance, current 1,803 1,566 1,793
Balance, noncurrent $ 411 $ 398 $ 395