Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 21,071	$ 19,573
Restricted cash	165	171
Short-term investments	13,567	24,361
Accounts receivable, net	3,571	10,992
Accounts receivable-related parties		1,677
Inventories	34,312	47,354
Other inventory supplies	12,533	15,813
Prepaid expenses and other current assets	1,186	2,353
Deferred tax assets		4,427
Total current assets	86,405	126,721
Property and equipment, net	115,220	119,850
Other assets	1,070	1,525
Total assets	202,695	248,096
Liabilities and stockholders' equity
Accounts payable	4,465	8,954
Accrued payroll	369	1,006
Accrued and other current liabilities	867	1,139
Corporate income and franchise taxes	192	216
Accrued real estate taxes	336	297
Advance payments	408	772
Total current liabilities	6,637	12,384
Deferred tax liability	267	10,326
Total liabilities	6,904	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; 24,433,523 and 24,327,140 shares issued; 22,658,679 and 22,552,296 shares outstanding	25	25
Additional paid-in capital	335,935	334,314
Treasury stock, at cost, 1,774,844	(12,148)	(12,148)
Accumulated other comprehensive (loss) income	(418)	447
Accumulated deficit	(127,603)	(97,252)
Total stockholders' equity	195,791	225,386
Total liabilities and stockholders' equity	$ 202,695	$ 248,096