Note 9 - Commitments and Contingencies (Detail) - Future minimum lease payments under noncancelable operating leases at December 31, 2011 were as foll (USD $)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2013						$ 2,950,179
2014					2,348,945
2015				1,768,549
2016			1,127,051
2017		634,742
2018	65,728
Total minimum lease payments	$ 8,895,194