Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	2013		2012		2011
	(In thousands)
Amounts charged against income, before income tax benefit	$	955	$	388	$	763
Amount of related income tax benefit		377		153		302
Total impact to net income	$	578	$	235	$	461

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
			(In thousands)
As of December 31, 2013
Money Market Funds	$	7,266	$	--	$	--	$	7,266
Commercial Paper	$	13,976	$	--	$	--	$	13,976
Total	$	21,242	$	--	$	--	$	21,242
As of December 31, 2012
Money Market Funds	$	5,245	$	--	$	--	$	5,245
Commercial Paper	$	2,242	$	--	$	--	$	2,242
Total	$	7,487	$	--	$	--	$	7,487

Schedule of Long-term Debt Instruments [Table Text Block]

	December 31, 2013		December 31, 2012
	(In thousands)
Total carrying amount of long-term debt	$	10,324	$	12,436
Estimated fair value of long-term debt	$	10,156	$	12,490

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

	2013				2012						2011
	Class A		Class B		Class A			Class B			Class A		Class B
	(In thousands, except per share data)
Numerator for net income per share - basic:
Allocation of distributed earnings	$	1,071	$	1,071	$	8,681		$	8,681		$	2,956	$	2,956
Allocation of undistributed earnings		6,670		6,672		(1,147	)		(1,147	)		2,826		2,826
Net income attributable to common shareholders	$	7,741	$	7,743	$	7,534		$	7,534		$	5,782	$	5,782
Denominator for net income per share - basic:
Weighted average common shares outstanding - basic		20,677		3,447		20,325			3,388			20,016		3,336
Net income per share - basic	$	0.37	$	2.25	$	0.37		$	2.22		$	0.29	$	1.73
Numerator for net income per share - diluted:
Net income attributable to common shareholders for basic computation	$	7,741	$	7,743	$	7,534		$	7,534		$	5,782	$	5,782
Denominator for net income per share - diluted:
Weighted average common shares outstanding - basic		20,677		3,447		20,325			3,388			20,016		3,336
Weighted average effect of dilutive securities:
Stock Options		388		61		492			82			474		79
Restricted Stock		34		6		37			6			36		6
Weighted average common shares outstanding - diluted		21,099		3,514		20,854			3,476			20,526		3,421
Net income per share - diluted	$	0.37	$	2.20	$	0.36		$	2.17		$	0.28	$	1.69