Note 3 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

	September 30,		December 31,
	2014		2013
Finished goods	$	54,011	$	54,403
Raw materials		4,500		6,084
	$	58,511	$	60,487

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2014		2013		2014		2013
Net income	$	12,106	$	11,452	$	27,750	$	36,484
Weighted average shares outstanding used in calculating basic earnings per share		13,771		14,661		14,299		14,648
Dilutive common share equivalents		112		251		94		178
Weighted average common and common share equivalents used in calculating diluted earnings per share		13,883		14,912		14,393		14,826
Income per common share:
Basic	$	0.88	$	0.78	$	1.94	$	2.49
Diluted	$	0.87	$	0.77	$	1.93	$	2.46
Options and restricted share units outstanding which are not included in the calculation of diluted earnings per share because their impact is anti-dilutive		123		--		78		3

Schedule of Credit Losses for Financing Receivables, Current [Table Text Block]

Balance at beginning of period	$	3,999
Provision		2,543
Write-offs		(2,875	)
Balance at end of period	$	3,667

Balance at beginning of period	$	317
Provision		1,416
Write-offs		(116	)
Balance at end of period	$	1,617

Past Due Financing Receivables [Table Text Block]

Current	$	4,200
1-30		575
31-60		315
61-90		686
91+		237
	$	6,013