Note 8 - Commitments and Contingencies (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2012

Dec. 31, 2012

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Year of Payment	Amount
2013	$	629
2014		343
2015		294
2016		290
2017		290
Thereafter		580
Total	$	2,426

Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]

Year of Payment	Amount
2013	$	145
2014		145
2015		155
2016		155
2017		155
Thereafter		310
Total	$	1,065

Schedule of Product Warranty Liability [Table Text Block]

	2012			2011			2010
Aggregate product warranty liability at beginning of year	$	313		$	215		$	199
Net aggregate expense related to product warranties		1,208			650			170
Aggregate reductions for payments		(745	)		(552	)		(154	)
Aggregate product warranty liability at end of year	$	776		$	313		$	215