CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 18,737 $ 29,187
Restricted cash 303 311
Short-term investments 43,977 53,523
Accounts receivable, net 22,292 20,155
Inventories 18,057 14,212
Prepaid expenses and other current assets 2,953 2,075
Total current assets 106,319 119,463
Property and equipment, net 6,471 5,089
Long-term investments 21,662 14,509
Intangible assets, net 4,737 1,409
Goodwill 2,648 231
Other assets 1,625 1,329
Total assets 143,462 142,030
Current liabilities:    
Accounts payable 17,009 15,016
Accrued liabilities 4,933 4,750
Deferred revenue 1,188 843
Current portion of notes payable 774 915
Total current liabilities 23,904 21,524
Notes payable 332 913
Other long-term liabilities 1,130 1,291
Total liabilities 25,366 23,728
Stockholders' equity:    
Common stock, $0.0001 par value; 500,000,000 shares authorized; 24,305,381 and 24,545,107 shares issued; 24,305,381 and 23,987,446 shares outstanding at December 31, 2014 and September 30, 2015 (unaudited), respectively 2 2
Treasury stock, at cost; 0 and 557,661 shares at December 31, 2014 and September 30, 2015 (unaudited), respectively (4,942)  
Additional paid-in capital 218,851 212,388
Accumulated deficit (94,927) (93,928)
Accumulated other comprehensive loss (888) (160)
Total stockholders' equity 118,096 118,302
Total liabilities and stockholders' equity $ 143,462 $ 142,030