CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 35,373	$ 29,761
Restricted cash	264	273
Short-term investments	54,544	44,057
Accounts receivable, net	34,157	29,925
Inventories	41,621	37,171
Prepaid expenses and other current assets	5,058	4,369
Total current assets	171,017	145,556
Property and equipment, net	8,684	7,337
Long-term investments	1,085	12,038
Intangible assets, net	21,962	26,081
Goodwill	21,598	21,867
Other assets	1,330	1,618
Total assets	225,676	214,497
Current liabilities:
Accounts payable	26,932	25,654
Accrued liabilities	8,431	10,835
Current portion of deferred revenue	5,121	4,538
Total current liabilities	40,484	41,027
Other long-term liabilities	4,500	3,942
Total liabilities	44,984	44,969
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $0.0001 par value; 500,000,000 shares authorized; 26,707,025 and 25,832,895 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	3	3
Additional paid-in capital	240,394	242,281
Accumulated deficit	(58,908)	(72,225)
Accumulated other comprehensive loss	(797)	(531)
Total stockholders' equity	180,692	169,528
Total liabilities and stockholders' equity	$ 225,676	$ 214,497