Note 1 - Business and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Property Plant and Equipment Estimated Useful Lives [Table Text Block]

Computer equipment (years)		3
Software (years)		3
Furniture, fixtures, and equipment (years)	5	-	7
Leasehold improvements	Shorter of estimated useful life or term of lease

Summary of Valuation Allowance [Table Text Block]

	Balance at Beginning of Period		Charged to Costs and Expenses		Deductions/ Write-offs of Accounts		Balance at End of Period
Allowance for doubtful accounts
2016	$	299	$	—	$	99	$	200
2015	$	381	$	—	$	82	$	299
2014	$	354	$	27	$	—	$	381

Adjustments to Consolidated Statements of Cash Flows Data [Member]

Notes Tables

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	Three months ended March 31, 2016				Six months ended June 30, 2016					Nine months ended September 30, 2016						Year ended December 31, 2015						Year ended December 31, 2014
(in thousands)	As reported		As adjusted		As reported		As adjusted			As reported			As adjusted			As reported			As adjusted			As reported		As adjusted
	(Unaudited)															(Audited)						(Audited)
Consolidated Statements of Cash Flows Data:
Net cash provided by (used in) operating activities	$	3,658	$	3,998	$	981	$	2,765		$	(282	)	$	1,829		$	28,526		$	30,336		$	27,089	$	28,666
Net cash provided by (used in) financing activities	$	1,289	$	950	$	95	$	(1,688	)	$	(1,458	)	$	(653	)	$	(7,420	)	$	(9,230	)	$	2,731	$	1,154

Adjustments to Consolidated Statements of Income Data [Member]

Notes Tables

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	Three months ended March 31, 2016						Three months ended June 30, 2016						Three months ended September 30, 2016
(in thousands, except percentages and per share amounts)	As reported			As adjusted			As reported			As adjusted			As reported			As adjusted
Consolidated Statements of Income Data:	(Unaudited)
Income tax provision	$	1,025		$	1,026		$	1,498		$	1,579		$	1,145		$	1,051
Net income	$	2,062		$	2,061		$	2,214		$	2,133		$	1,890		$	1,984
Effective tax rate		33	%		33	%		40	%		43	%		38	%		35	%
Net income per share:
Basic	$	0.07		$	0.07		$	0.07		$	0.07		$	0.06		$	0.06
Diluted	$	0.07		$	0.07		$	0.07		$	0.07		$	0.06		$	0.06
Weighted average common shares:
Diluted		31,722			31,754			32,023			32,099			32,373			32,578

Adjustments to Consolidated Balance Sheets Data [Member]

Notes Tables

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	March 31, 2016						June 30, 2016						September 30, 2016
(in thousands)	As reported			As adjusted			As reported			As adjusted			As reported			As adjusted
	(Unaudited)
Consolidated Balance Sheets Data:
Deferred tax assets	$	10,186		$	14,761		$	10,106		$	14,201		$	10,201		$	14,135
Total assets	$	198,217		$	202,792		$	202,233		$	206,328		$	210,152		$	214,086
Common stock and additional paid-in capital	$	269,949		$	269,600		$	272,891		$	272,143		$	277,503		$	276,500
Accumulated deficit	$	(37,718	)	$	(32,794	)	$	(35,504	)	$	(30,661	)	$	(33,614	)	$	(28,677	)
Total stockholders’ equity	$	180,655		$	185,230		$	182,716		$	186,811		$	188,950		$	192,884
Total liabilities and stockholders’ equity	$	198,217		$	202,792		$	202,233		$	206,328		$	210,152		$	214,086