CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 29,530	$ 29,187
Restricted cash	296	311
Short-term investments	37,761	53,523
Accounts receivable, net	21,322	20,155
Inventories	19,855	14,212
Prepaid expenses and other current assets	3,842	2,075
Total current assets	112,606	119,463
Property and equipment, net	6,584	5,089
Long-term investments	13,716	14,509
Intangible assets, net	4,547	1,409
Goodwill	2,760	231
Other assets	1,650	1,329
Total assets	141,863	142,030
Current liabilities:
Accounts payable	17,588	15,016
Accrued liabilities	5,880	4,750
Deferred revenue	1,099	843
Current portion of notes payable	727	915
Total current liabilities	25,294	21,524
Notes payable	186	913
Other long-term liabilities	938	1,291
Total liabilities	$ 26,418	$ 23,728
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $0.0001 par value; 500,000,000 shares authorized; 24,305,381 and 24,590,768 shares issued; 24,305,381 and 23,436,288 shares outstanding at December 31, 2014 and 2015, respectively	$ 2	$ 2
Treasury stock, at cost; 0 and 1,154,480 shares at December 31, 2014 and 2015, respectively	(9,020)
Additional paid-in capital	220,782	212,388
Accumulated deficit	(95,580)	(93,928)
Accumulated other comprehensive loss	(739)	(160)
Total stockholders' equity	115,445	118,302
Total liabilities and stockholders' equity	$ 141,863	$ 142,030