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Note 13 - Commitments and contingencies: (Detail) - Summary of general office facilities and equipment: (USD $)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2013					$ 2,017,000
2014				1,543,000
2015			1,481,000
2016		995,000
2017	953,000
Thereafter	$ 1,584,000

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