Consolidated balance sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 22,779	$ 19,573
Restricted cash	166	171
Short-term investments	17,940	24,361
Accounts receivable	1,465	10,992
Accounts receivable, related parties	1,638	1,677
Inventories	43,755	47,354
Other inventory supplies	13,221	15,813
Prepaid expenses and other current assets	903	2,353
Deferred tax assets	4,752	4,427
Total current assets	106,619	126,721
Property and equipment, net	116,340	119,850
Other assets	891	1,525
Total assets	223,850	248,096
Liabilities and stockholders' equity
Accounts payable	2,807	8,954
Accrued payroll	421	1,006
Accrued and other current liabilities	900	1,436
Corporate income and franchise taxes	115	216
Advance payments	202	772
Total current liabilities	4,445	12,384
Deferred tax liability	2,998	10,326
Total liabilities	7,443	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 24,363,246 and 24,327,140 shares issued; 22,588,402 and 22,552,296 shares outstanding	25	25
Additional paid-in capital	335,171	334,314
Unearned restricted stock compensation	(81)
Treasury stock, at cost, 1,774,844 shares	(12,148)	(12,148)
Accumulated other comprehensive (loss) income	(38)	447
Accumulated deficit	(106,522)	(97,252)
Total stockholders' equity	216,407	225,386
Total liabilities and stockholders' equity	$ 223,850	$ 248,096