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Note 12 - Leases (Details Textual) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Assets, Noncurrent, Excluding Property, Plant, and Equipment | $ 2,858,999 |  | $ 1,935,119
Liabilities, Current, Total | 32,062,745 |  | $ 30,208,712
Operating Lease, Expense | 379,000 |  |
Operating Lease, Payments | $ 361,000 |  |
Accounting Standards Update 2016-02 [Member] |  |  |
Assets, Noncurrent, Excluding Property, Plant, and Equipment |  | $ 2,800,000 |
Liabilities, Current, Total |  | 1,300,000 |
Liabilities, Noncurrent, Total |  | $ 1,500,000 |

X
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