Note 4 - Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2014

Segment Reporting [Abstract]

Revenue from External Customers by Products and Services [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Residential power products	$	179,592	$	196,616	$	343,561	$	451,860
Commercial & industrial power products		163,467		133,427		320,837		260,507
Other		19,550		16,645		40,219		33,893
Total	$	362,609	$	346,688	$	704,617	$	746,260