Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS (Note 7)
Cash and cash equivalents	$ 13,452	$ 16,917
Accounts receivable, net of allowance for doubtful accounts of $511 and $525 at March 31, 2012 and December 31, 2011, respectively	20,532	18,387
Inventories	2,506	2,226
Other current assets	1,585	2,140
Total current assets	38,075	39,670
Property, plant and equipment at cost	54,888	54,333
Less: Accumulated depreciation and amortization	41,610	41,281
Property, plant and equipment, net	13,278	13,052
Intangible assets, net	117	195
Other assets	366	364
Total assets	51,836	53,281
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	6,315	5,174
Accrued expenses	6,629	6,173
Total current liabilities	12,944	11,347
Other long-term liabilities	1,133	1,185
Commitments and contingencies (Note 8)
Stockholders' Equity:
Common stock, par value $.04 per share; authorized 240,000,000 shares, issued 69,678,982 shares at March 31, 2012 and December 31, 2011. Outstanding: 69,669,587 shares at March 31, 2012 and December 31, 2011.	2,787	2,787
Additional paid-in capital	148,987	148,839
Accumulated deficit	(113,944)	(110,806)
Stockholders' equity before treasury stock	37,830	40,820
Less: Treasury stock, at cost; 9,395 shares as of March 31, 2012 and December 31, 2011	(71)	(71)
Total stockholders' equity	37,759	40,749
Total liabilities and stockholders' equity	$ 51,836	$ 53,281