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Note 9 - Future Minimum Lease Payments Under Noncancelable Operating Leases (Details)
Dec. 31, 2015
USD ($)
2016 $ 3,685,292
2017 2,925,137
2018 2,141,641
2019 1,474,072
2020 934,880
2021 584,334
2022 438,003
2023 317,870
2024 242,023
2025-2026 187,114
Total minimum lease payments $ 12,930,366