Note 3 - Inventories (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

Schedule of Inventory, Current [Table Text Block]

(In thousands)		2015		2014
Raw materials:
Drilling fluids	$	133,934	$	152,076
Mats		657		1,531
Total raw materials		134,591		153,607
Blended drilling fluids components		25,343		40,971
Finished goods- mats		3,723		1,978
Total inventories	$	163,657	$	196,556