CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 14,637 $ 29,187
Restricted cash 297 311
Short-term investments 50,707 53,523
Accounts receivable, net 18,749 20,155
Inventories 19,762 14,212
Prepaid expenses and other current assets 2,473 2,075
Total current assets 106,625 119,463
Property and equipment, net 5,987 5,089
Long-term investments 18,770 14,509
Intangible assets, net 5,923 1,409
Goodwill 2,753 231
Other assets 1,319 1,329
Total assets 141,377 142,030
Current liabilities:    
Accounts payable 17,479 15,016
Accrued liabilities 4,233 4,750
Deferred revenue 929 843
Current portion of notes payable 842 915
Total current liabilities 23,483 21,524
Notes payable 719 913
Other long-term liabilities 1,011 1,291
Total liabilities 25,213 23,728
Commitments and contingencies      
Stockholders' equity:    
Common stock, $0.0001 par value; 500,000,000 shares authorized; 24,305,381 and 24,402,371 shares issued and outstanding at December 31, 2014 and March 31, 2015 (unaudited), respectively 2 2
Additional paid-in capital 214,728 212,388
Accumulated deficit (98,159) (93,928)
Accumulated other comprehensive loss (407) (160)
Total stockholders' equity 116,164 118,302
Total liabilities and stockholders' equity $ 141,377 $ 142,030