CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 78,375	$ 81,985
Income tax receivable	9,515	6,939
Accounts receivable, trade, less allowances for doubtful accounts of $458 and $118 in 2013 and 2012, respectively	4,008	5,316
Inventories	7,492	8,585
Prepaid expenses	1,307	1,374
Deferred tax assets	2,018	1,823
Other current assets	1,070	596
Total current assets	103,785	106,618
Property, plant and equipment, net	27,474	27,750
Deferred financing costs, net	172	189
Deferred tax assets	10,247	11,728
Other noncurrent assets	870	879
Total assets	142,548	147,164
CURRENT LIABILITIES
Accounts payable	3,908	2,893
Accrued liabilities (Note 7)	9,025	10,376
Income taxes payable	780	917
Total current liabilities	13,713	14,186
Other long-term liabilities	5,431	5,539
Total liabilities	19,144	19,725
COMMITMENTS AND CONTINGENCIES (Note 8)
Stockholders' Equity
Preferred stock, $0.01 par value, 20,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.01 par value, 200,000,000 shares authorized; 41,688,320 and 41,684,598 issued and outstanding, respectively, in 2013 and 41,684,960 and 41,681,238 issued and outstanding, respectively, in 2012	416	416
Treasury stock, at cost	(57)	(57)
Additional paid-in capital	234,183	233,659
Accumulated deficit	(108,345)	(104,135)
Accumulated other comprehensive loss, net	(2,793)	(2,444)
Total stockholders' equity	123,404	127,439
Total liabilities and stockholders' equity	$ 142,548	$ 147,164