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Note 8 - Debt (Tables) | 3 Months Ended
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Mar. 31, 2020
Notes Tables |
Schedule Of Outstanding Letters Of Credit [Table Text Block] |
|  |  |  |  |  |  | Letters of Credit Amount Outstanding |
| Original L/C Issue Date |  | L/C Expiration Date |  | Lease Expiration Date |  | March 31, 20 20 |  |  | December 31, 201 9 |
Mt. Laurel, NJ | 3/29/2010 |  | 4/30/2021 |  | 4/30/2021 |  | $ | 90 |  |  | $ | 90 |
Mansfield, MA | 10/27/2010 |  | 12/31/2024 |  | 12/31/2024 |  |  | 50 |  |  |  | 50 |
|  |  |  |  |  |  | $ | 140 |  |  | $ | 140 |

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