Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Amortization of Capitalized Contract Cost [Table Text Block]

	2021		2020		2019
	(In thousands)
Direct expenses	$	157	$	272	$	34
Selling, general and administrative expenses	$	2,494	$	2,970	$	2,874
Total amortization	$	2,651	$	3,242	$	2,908

Financing Receivable, Allowance for Credit Loss [Table Text Block]

	Balance at Beginning of Year		Bad Debt Expense		Write-offs, net of Recoveries		Balance at End of Year
Year Ended December 31, 2019	$	175	$	75	$	106	$	144
Year Ended December 31, 2020	$	144	$	46	$	70	$	120
Year Ended December 31, 2021	$	120	$	38	$	64	$	94

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	2021			2020			2019
	(In thousands)
Amounts charged against income, before income tax benefit	$	623		$	680		$	1,224
Amount of related income tax benefit		(919	)		(6,764	)		(2,081	)
Net (benefit) expense to net income	$	(296	)	$	(6,084	)	$	(857	)

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Level 1		Level 2		Level 3		Total
	(In thousands)
As of December 31, 2021
Money Market Funds	$	6,306	$	--	$	--	$	6,306
Total Cash Equivalents	$	6,306	$	--	$	--	$	6,306
As of December 31, 2020
Money Market Funds	$	5,015	$	--	$	--	$	5,015
Total Cash Equivalents	$	5,015	$	--	$	--	$	5,015

	December 31, 2021		December 31, 2020
	(In thousands)
Total carrying amount of long-term debt	$	26,620	$	30,713
Estimated fair value of long-term debt	$	27,708	$	32,943

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	2021			2020			2019
	(In thousands, except per share data)
Numerator for net income per share - basic:
Net income	$	37,466		$	37,260		$	32,406
Allocation of distributed and undistributed income to unvested restricted stock shareholders		(18	)		(57	)		(109	)
Net income attributable to common shareholders	$	37,448		$	37,203		$	32,297
Denominator for net income per share - basic:
Weighted average common shares outstanding – basic		25,422			25,170			24,809
Net income per share – basic	$	1.47		$	1.48		$	1.30
Numerator for net income per share - diluted:
Net income attributable to common shareholders for basic computation	$	37,448		$	37,203		$	32,297
Denominator for net income per share - diluted:
Weighted average common shares outstanding – basic		25,422			25,170			24,809
Weighted average effect of dilutive securities – stock options		218			526			844
Denominator for diluted earnings per share – adjusted weighted average shares		25,640			25,696			25,653
Net income per share – diluted	$	1.46		$	1.45		$	1.26