Note 4 - Product Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Inventory, Current [Table Text Block]

	March 31, 2013		December 31, 2012
Raw materials	$	2,391	$	2,337
Work in process		2,357		3,666
Finished goods		1,408		1,413
Total product inventories	$	6,156	$	7,416