Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 19,973	$ 16,073
Restricted cash	542	533
Short-term investments	63,000	66,131
Accounts receivable, net	31,243	18,676
Inventories, net	12,615	11,135
Other inventory supplies	11,437	7,821
Prepaid expenses and other current assets	1,725	1,862
Deferred tax assets	1,990
Total current assets	142,525	122,231
Property and equipment, net	103,624	82,511
Investments	2,000	2,000
Deferred tax assets	1,339
Total assets	249,488	206,742
Liabilities and stockholders' equity
Accounts payable	8,465	9,255
Accrued payroll	1,652	2,538
Corporate income and franchise taxes	2,084	407
Advance payments	385	1,103
Accrued and other current liabilities	2,614	1,345
Total current liabilities	15,200	14,648
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 and 85,000,000 shares authorized and 24,289,523 and 24,210,644 shares issued; 23,039,548 and 22,960,669 shares outstanding	24	23
Additional paid-in capital	340,716	327,515
Treasury stock, at cost, 1,249,975 shares	(5,661)	(5,661)
Accumulated other comprehensive deficit	(30)	(10)
Accumulated deficit	(100,761)	(129,773)
Total stockholders' equity	234,288	192,094
Total liabilities and stockholders' equity	$ 249,488	$ 206,742