CONSOLIDATED STATEMENTS OF INCOME (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue from services	$ 5,088,000	$ 5,279,000	$ 6,213,000
Revenue from product sales	189,144,000	271,934,000	337,956,000
Total Revenue	194,232,000	277,213,000	344,169,000
Cost of goods sold for services	4,655,000	4,716,000	5,402,000
Cost of goods sold for product sales	180,345,000	260,776,000	310,444,000
Inventory adjustment for lower cost or market	0	3,441,000	0
Total Cost of goods sold	185,000,000	268,933,000	315,846,000
Provision for employee terminations and severances	228,400	0	0
Other selling, general, and administrative expenses	11,197,000	12,394,000	13,611,000
Total selling, general and administrative expenses	11,425,000	12,394,000	13,611,000
Impairment loss, goodwill (Note 14)	6,840,000	0	0
(Loss) income before other income (expense)	(9,033,000)	(4,114,000)	14,712,000
Other income (expense)
Interest expense	(1,797,000)	(2,368,000)	(2,636,000)
Interest income	9,000	19,000	29,000
Gain on sale of assets	47,000	107,000	281,000
Other (loss) income, net	0	(566,000)	40,000
Total other expense	(1,741,000)	(2,808,000)	(2,286,000)
(Loss) income before income taxes	(10,774,000)	(6,922,000)	12,426,000
Income tax (benefit) provision (Note 4)	(4,154,000)	(3,041,000)	4,373,000
Net (loss) income	$ (6,620,000)	$ (3,881,000)	$ 8,053,000
Basic (loss) earnings per share (in dollars per share)	$ (0.95)	$ (0.56)	$ 1.22
Diluted (loss) earnings per share (in dollars per share)	$ (0.95)	$ (0.56)	$ 1.21