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Note 10 - Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule Of Outstanding Letters Of Credit [Table Text Block] |
|  |  | L/C |  | Lease |  | Letters of Credit Amount Outstanding |
Facility | Original L/C Issue Date |  | Expiration Date |  | Expiration Date |  | Dec. 31 2020 |  |  | Dec. 31 2019 |
Mt. Laurel, NJ | 3/29/2010 |  | 4/30/2021 |  | 4/30/2031 |  | $ | 90 |  |  | $ | 90 |
Mansfield, MA | 10/27/2010 |  | 12/31/2024 |  | 12/31/2024 |  |  | 50 |  |  |  | 50 |
|  |  |  |  |  |  | $ | 140 |  |  | $ | 140 |

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