Note 4 - Property, Equipment and Leasehold Improvements (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

	Estimated useful lives				December 31,
	(years)				2014		2015
Building			15		$	2,554	$	3,669
Computer and office equipment			3			19,160		23,162
Furniture and fixtures		3	to	5		4,274		5,051
Leasehold improvements		Lease term				4,836		6,272
						30,824		38,154
Less accumulated depreciation and amortization						15,098		18,009
Totals					$	15,726	$	20,145