Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Assets
Cash and cash equivalents	$ 21,774	$ 4,290	$ 19,973
Restricted cash	166	189
Short-term investments	29,928	50,528
Accounts receivable	5,692	30,655
Accounts receivable, related parties	3,624	1,989
Inventories	38,813	22,823
Other inventory supplies	15,548	17,613
Prepaid expenses and other current assets	2,026	4,491
Deferred tax assets	3,078	3,078
Total current assets	120,649	135,656
Property and equipment, net	121,404	120,931
Investments	2,000	2,000
Other assets	1,550	1,365
Total assets	245,603	259,952
Liabilities and stockholders' equity
Accounts payable	7,041	12,831
Accrued payroll	1,222	1,578
Accrued and other current liabilities	1,271	1,570
Corporate income and franchise taxes	321	612
Advance payments	948	9
Total current liabilities	10,803	16,600
Deferred tax liability	10,218	15,121
Total liabilities	21,021	31,721
Commitments and contingencies (Note 9)
Stockholders' equity
Preferred stock, $0.001 par value, 5,000,000 undesignated shares authorized, no shares issued or outstanding
Common stock, $0.001 par value, 45,000,000 shares authorized and 24,308,452 and 24,289,723 shares issued; 22,533,608 and 22,514,879 shares outstanding	24	24
Additional paid-in capital	333,111	332,119
Treasury stock, at cost, 1,774,844 shares	(12,148)	(12,148)
Accumulated other comprehensive loss	(12)	(50)	(10)
Accumulated deficit	(96,393)	(91,714)
Total stockholders' equity	224,582	228,231
Total liabilities and stockholders' equity	$ 245,603	$ 259,952