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Consolidated Statements of Operations (In thousands, except per share amounts) Quarterly Data (Unaudited) (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Consolidated Statements of Operations Quarterly Data (Unaudited)                    
NET SALES $ 12,992 $ 10,870 $ 10,732 $ 11,427 $ 9,823 $ 19,914 $ 14,108 $ 12,808 $ 46,021 $ 56,653
Cost of sales 14,324 9,289 9,020 9,933 8,546 16,068 10,441 9,618 42,566 44,673
GROSS MARGIN (1,332) 1,581 1,712 1,494 1,277 3,846 3,667 3,190 3,455 11,980
Technical services and research and development 193 135 171 153 111 90 101 82 652 384
Selling, general and administrative expenses 1,078 1,119 1,247 1,278 1,204 1,242 1,359 1,224 4,722 5,029
Loss on disposal of assets       10   (6)     10 (6)
OPERATING INCOME (LOSS) (2,603) 327 294 53 (38) 2,520 2,207 1,884 (1,929) 6,573
Interest expense (389) (103) (99) (84) (471) (143) (112) (142) (389) (471)
(Loss) gain on foreign currency exchange rate 11 (84) 20 (87) (29) (24) (20) 23 (140) (50)
Other, net   6   12 (1)   1   18  
Total Other Expense                 (511) (521)
INCOME (LOSS) BEFORE INCOME TAX (2,695) 146 215 (106) (142) 2,353 2,076 1,765 (2,440) 6,052
Income tax (benefit) expense (891) 33 65 (31) (378) 516 517 369 (824) 1,024
NET INCOME (LOSS) (1,804) 113 150 (75) 236 1,837 1,559 1,396 (1,616) 5,028
Plus: 6% Convertible Debenture Interest Expense               22   22
Diluted Income Available to Common Shareholders         236 1,837 1,559 1,418   5,050
Basic (0.60) 0.04 0.05 (0.03) 0.08 0.62 0.56 0.58 (0.54) 1.81
Diluted $ (0.60) $ 0.03 $ 0.04 $ (0.03) $ 0.07 $ 0.53 $ 0.45 $ 0.41 $ (0.54) $ 1.49
Basic         2,980 2,968 2,769 2,402   2,781
Diluted         3,424 3,441 3,462 3,439   3,394