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Basis of presentation (Details) - USD ($) $ in Millions | Aug. 16, 2021 | Oct. 16, 2020 | May 01, 2020 | Mar. 13, 2020
--- | --- | --- | --- | ---
Basis of presentation [Abstract] |  |  |  |
Proceeds from Public Offering | $ 11.2 | $ 8.7 |  |
Shares sold in Public Offering (in shares) | 842,375 | 1,380,000 |  |
PPP Loan [Member] |  |  |  |
Basis of presentation [Abstract] |  |  |  |
Face amount |  |  | $ 2.2 |
Revolving Credit Facility [Member] |  |  |  |
Basis of presentation [Abstract] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 10.0

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