CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 17,180 $ 29,187
Restricted cash 314 311
Short-term investments 46,118 53,523
Accounts receivable, net 21,960 20,155
Inventories 18,437 14,212
Prepaid expenses and other current assets 2,533 2,075
Total current assets 106,542 119,463
Property and equipment, net 6,348 5,089
Long-term investments 19,838 14,509
Intangible assets, net 5,503 1,409
Goodwill 2,742 231
Other assets 1,483 1,329
Total assets 142,456 142,030
Current liabilities:    
Accounts payable 15,423 15,016
Accrued liabilities 5,771 4,750
Deferred revenue 1,033 843
Current portion of notes payable 797 915
Total current liabilities 23,024 21,524
Notes payable 525 913
Other long-term liabilities 923 1,291
Total liabilities 24,472 23,728
Stockholders' equity:    
Common stock, $0.0001 par value; 500,000,000 shares authorized; 24,305,381 and 24,457,157 shares issued; 24,305,381 and 24,229,882 shares outstanding at December 31, 2014 and June 30, 2015 (unaudited), respectively 2 2
Treasury stock, at cost; 0 and 227,275 shares at December 31, 2014 and June 30, 2015 (unaudited), respectively (2,148)  
Additional paid-in capital 216,626 212,388
Accumulated deficit (96,118) (93,928)
Accumulated other comprehensive loss (378) (160)
Total stockholders' equity 117,984 118,302
Total liabilities and stockholders' equity $ 142,456 $ 142,030