CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 26,885 $ 84,546
Short-term investments 36,592  
Accounts receivable, net 15,623 15,064
Inventories 17,120 15,312
Prepaid expenses and other current assets 2,022 1,773
Total current assets 98,242 116,695
Property and equipment, net 3,727 3,943
Long-term investments 22,107  
Intangible assets, net 830 928
Other assets 1,143 1,120
Total assets 126,049 122,686
Current liabilities:    
Accounts payable 14,395 13,314
Accrued liabilities 5,420 6,821
Deferred revenue 766 644
Current portion of notes payable 1,091 1,138
Total current liabilities 21,672 21,917
Notes payable 1,578 1,828
Other long-term liabilities 450 467
Total liabilities 23,700 24,212
Commitments and contingencies      
Stockholders' equity:    
Common stock, $0.0001 par value; 500,000,000 shares authorized; 22,785,104 and 23,579,068 shares issued and outstanding at December 31, 2013 and March 31, 2014 (unaudited), respectively 2 2
Additional paid-in capital 204,991 200,545
Accumulated deficit (102,623) (102,084)
Accumulated other comprehensive income (loss) (21) 11
Total stockholders' equity 102,349 98,474
Total liabilities and stockholders' equity $ 126,049 $ 122,686