Annual report pursuant to Section 13 and 15(d)

NATURE OF OPERATIONS AND ACCOUNTING POLICIES Schedule of Inventory Allowance (Details)

v3.3.1.900
NATURE OF OPERATIONS AND ACCOUNTING POLICIES Schedule of Inventory Allowance (Details) - Inventory Valuation Reserve - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 5,091 $ 5,169 $ 9,213
Increases (decreases) to allowance (270) (78) (4,044)
Balance at end of period $ 4,821 $ 5,091 $ 5,169