Note 7 - Inventories (Tables)

3 Months Ended

Mar. 31, 2014

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

(In thousands)	March 31, 2014		December 31, 2013
Raw materials:
Drilling fluids	$	173,393	$	153,901
Mats		914		790
Total raw materials		174,307		154,691
Blended drilling fluids components		23,914		34,075
Finished goods- mats		1,344		914
Total	$	199,565	$	189,680