Note 16 - Summary of Unaudited Quarterly Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Scenario, Previously Reported [Member]
Cost of services - compensation expense	$ 46,694	$ 42,330	$ 42,303	$ 42,726	$ 43,772	$ 42,375	$ 43,130	$ 46,921
Selling, general and administrative expenses	22,582	21,399	20,863	21,302	24,117	19,334	19,023	16,489
Cost of services - compensation expense	46,694	42,330	42,303	42,726	43,772	42,375	43,130	46,921
Selling, general and administrative expenses	22,582	21,399	20,863	21,302	24,117	19,334	19,023	16,489
Revenue	128,514	118,444	116,934	110,324	112,161	113,796	112,561	104,707
Operating income	14,823	13,016	11,752	7,981	(91)	13,940	12,558	7,797
Net income (loss)	$ 8,725	$ 6,862	$ 5,418	$ 3,522	$ (2,394)	$ 6,950	$ 6,038	$ 3,353
Net income per common share - basic (in dollars per share)	$ 0.10	$ 0.08	$ 0.06	$ 0.04	$ (0.03)	$ 0.08	$ 0.07	$ 0.04
Net income per common share - diluted (in dollars per share)	$ 0.10	$ 0.08	$ 0.06	$ 0.04	$ (0.03)	$ 0.08	$ 0.07	$ 0.04
Cost of services - compensation expense		$ 43,628	$ 43,883	$ 44,067	$ 45,391	$ 43,464	$ 44,380	$ 48,038
Selling, general and administrative expenses		21,295	19,283	19,961	29,146	18,297	18,256	15,372
Cost of services - compensation expense		43,628	43,883	44,067	45,391	43,464	44,380	48,038
Selling, general and administrative expenses		$ 21,295	$ 19,283	$ 19,961	$ 29,146	$ 18,297	$ 18,256	$ 15,372