Note 3 - Discontinued Operations and Sale of a Business (Details Textual) - Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] - Orbital Gas Systems Limited [Member] $ in Thousands, £ in Millions |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
|
Dec. 31, 2021
USD ($)
|
Sep. 30, 2022
USD ($)
|
Dec. 31, 2021
GBP (£)
|
|
| Disposal Group, Including Discontinued Operation, Assets Held-for-sale Impairment | $ 9,200 | ||
| Investment, Expected Net Realizable Value | $ 4,100 | £ 3 | |
| Royalty Payment, Percent of Gross Sales | 15.00% | ||
| Cash Provided by (Used in) Operating Activities, Discontinued Operations | $ (800) | ||
| Cash Provided by (Used in) Investing Activities, Discontinued Operations | $ 62 |