Consolidated balance sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 21,578	$ 19,573
Restricted cash	165	171
Short-term investments	14,896	24,361
Accounts receivable, net	4,193	10,992
Accounts receivable, related parties	250	1,677
Inventories	39,000	47,354
Other inventory supplies	12,456	15,813
Prepaid expenses and other current assets	992	2,353
Deferred tax assets	4,892	4,427
Total current assets	98,422	126,721
Property and equipment, net	117,116	119,850
Deferred tax assets	975
Other assets	860	1,525
Total assets	217,373	248,096
Liabilities and stockholders' equity
Accounts payable	4,733	8,954
Accrued payroll	390	1,006
Accrued and other current liabilities	845	1,436
Corporate income and franchise taxes	172	216
Advance payments	281	772
Total current liabilities	6,421	12,384
Deferred tax liability		10,326
Total liabilities	6,421	22,710
Commitments and contingencies
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 24,428,777 and 24,327,140 shares issued; 22,653,933 and 25,552,296 shares outstanding	25	25
Additional paid-in capital	336,063	334,314
Unearned restricted stock compensation	(380)
Treasury stock, at cost, 1,774,844 shares	(12,148)	(12,148)
Accumulated other comprehensive (loss) income	(246)	447
Accumulated deficit	(112,362)	(97,252)
Total stockholders' equity	210,952	225,386
Total liabilities and stockholders' equity	$ 217,373	$ 248,096