CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 17,450 $ 84,546
Restricted cash 325  
Short-term investments 48,730  
Accounts receivable, net 19,215 15,064
Inventories 15,546 15,312
Prepaid expenses and other current assets 2,179 1,773
Total current assets 103,445 116,695
Property and equipment, net 4,208 3,943
Long-term investments 23,225  
Intangible assets, net 1,570 928
Goodwill 99  
Other assets 1,144 1,120
Total assets 133,691 122,686
Current liabilities:    
Accounts payable 14,217 13,314
Accrued liabilities 4,902 6,821
Deferred revenue 743 644
Current portion of notes payable 1,013 1,138
Total current liabilities 20,875 21,917
Notes payable 1,106 1,828
Other long-term liabilities 440 467
Total liabilities 22,421 24,212
Commitments and contingencies      
Stockholders' equity:    
Common stock, $0.0001 par value; 500,000,000 shares authorized; 22,785,104 and 23,870,761 shares issued and outstanding at December 31, 2013 and September 30, 2014 (unaudited), respectively 2 2
Additional paid-in capital 209,187 200,545
Accumulated deficit (97,849) (102,084)
Accumulated other comprehensive income (loss) (70) 11
Total stockholders' equity 111,270 98,474
Total liabilities and stockholders' equity $ 133,691 $ 122,686