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Note 15 - Commitments and Contingencies - Summary of General Office Facilities and Equipment (Details) | Dec. 31, 2017 USD ($)
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Contractual lease obligations, 2018 | $ 1,989,000
Purchase obligations, 2018 | 34,405,000
Total obligations, 2018 | 36,394,000
Contractual lease obligations, 2019 | 1,569,000
Purchase obligations, 2019 | 12,121,000
Total obligations, 2019 | 13,690,000
Contractual lease obligations, 2020 | 1,119,000
Purchase obligations, 2020 | 553,000
Total obligations, 2020 | 1,672,000
Contractual lease obligations, 2021 | 455,000
Purchase obligations, 2021 | 31,000
Total obligations, 2021 | 486,000
Contractual lease obligations, 2022 | 348,000
Purchase obligations, 2022 | 28,000
Total obligations, 2022 | 376,000
Contractual lease obligations, thereafter | 1,857,000
Purchase obligations, thereafter | 227,000
Total obligations, thereafter | 2,084,000
Contractual lease obligations, total | 7,337,000
Purchase obligations, total | 47,365,000
Total obligations | $ 54,702,000

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