Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 72,083 $ 78,283
Accounts receivable, net of allowance for doubtful accounts of $0 as of December 31, 2013 and $170 as of December 31, 2012 6,791 7,294
Accounts receivable, due from related parties 231 1,036
Inventory, current portion 0 1,631
Prepaid expenses and other current assets 2,247 1,361
Total current assets 81,352 89,605
Inventory, net of current portion 6,510 3,160
Property and equipment, net 28,485 24,058
Intangible assets, net 7,855 6,671
Other assets 280 191
Total assets 124,482 123,685
Current liabilities:    
Accounts payable 2,157 971
Accrued liabilities 3,672 3,386
Accrued compensation and employee benefits 3,655 3,397
Deferred revenue 2,087 2,301
Related party deferred revenue 385 829
Note payable 2,000 26,514
Total current liabilities 13,956 37,398
Deferred revenue, net of current portion 830 0
Deferred rent, net of current portion 1,844 624
Note payable, net of current portion 23,000 0
Other long-term liabilities 0 146
Total liabilities 39,630 38,168
Commitments and contingencies (note 5)      
Stockholders’ equity:    
Preferred stock, $0.001 par value, 5,000,000 shares authorized, no shares issued and outstanding as of December 31, 2013 and December 31, 2012 0 0
Common stock, par value $0.001 per share—200,000,000 shares authorized; 46,486,372 and 44,046,970 shares issued and outstanding as of December 31, 2013 and December 31, 2012, respectively 46 44
Additional paid-in capital 194,930 186,778
Accumulated deficit (110,124) (101,305)
Total stockholders’ equity 84,852 85,517
Total liabilities and stockholders’ equity $ 124,482 $ 123,685