Note 13 - Segment Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	2014		2013		2012
	(In thousands)
Revenue:
United States	$	92,270	$	85,863	$	79,895
Canada		6,567		6,727		6,526
Total	$	98,837	$	92,590	$	86,421
Long-lived assets:
United States	$	73,328	$	71,139	$	72,817
Canada		2,994		3,383		3,414
Total	$	76,322	$	74,522	$	76,231
Total assets:
United States	$	115,730	$	98,074	$	87,670
Canada		13,780		13,014		12,376
Total	$	129,510	$	111,088	$	100,046