Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 16,370	$ 21,216
Restricted cash	176	170
Short-term investments		8,895
Accounts receivable, net	1,978	1,738
Inventories	10,644	21,333
Other inventory supplies	5,124	5,717
Prepaid expenses and other current assets	356	1,188
Assets held for sale	1,329
Total current assets	35,977	60,257
Property and equipment, net	41,119	57,569
Other assets	624	1,416
Total assets	77,720	119,242
Liabilities and stockholders' equity
Accounts payable	2,263	3,256
Accrued payroll	1,421	164
Accrued and other current liabilities	495	1,328
Corporate income and franchise taxes	166	207
Accrued real estate taxes	185	238
Short-term loan payable		1,500
Advance payments	460	9
Total current liabilities	4,990	6,702
Deferred tax liability		554
Total liabilities	4,990	7,256
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, 40,000,000 shares authorized and 28,604,376 and 28,007,811 shares issued; 26,829,532 and 26,232,967 shares outstanding	29	28
Additional paid-in capital	374,642	373,565
Treasury stock, at cost, 1,774,844 shares	(12,148)	(12,148)
Accumulated other comprehensive loss	(26)	(33)
Accumulated deficit	(289,767)	(249,426)
Total stockholders' equity	72,730	111,986
Total liabilities and stockholders' equity	$ 77,720	$ 119,242