CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 27,229 $ 29,761
Restricted cash 267 273
Short-term investments 53,317 44,057
Accounts receivable, net 29,806 29,925
Inventories 41,713 37,171
Prepaid expenses and other current assets 5,445 4,369
Total current assets 157,777 145,556
Property and equipment, net 7,872 7,337
Long-term investments 2,557 12,038
Intangible assets, net 23,315 26,081
Goodwill 21,672 21,867
Other assets 1,491 1,618
Total assets 214,684 214,497
Current liabilities:    
Accounts payable 26,141 25,654
Accrued liabilities 8,296 10,835
Current portion of deferred revenue 4,990 4,538
Total current liabilities 39,427 41,027
Other long-term liabilities 4,164 3,942
Total liabilities 43,591 44,969
Commitments and contingencies (Note 11)
Stockholders' equity:    
Common stock, $0.0001 par value; 500,000,000 shares authorized; 26,086,642 and 25,832,895 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively 3 3
Additional paid-in capital 236,434 242,281
Accumulated deficit (64,620) (72,225)
Accumulated other comprehensive loss (724) (531)
Total stockholders' equity 171,093 169,528
Total liabilities and stockholders' equity $ 214,684 $ 214,497