Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 46,930	$ 35,710
Short-term investments	4,497	12,867
Accounts receivable, net	43,086	33,359
Inventory	28,103	28,095
Prepaid expenses and other current assets	11,135	11,771
Total current assets	133,751	121,802
Long-term investments	508	3,490
Restricted cash	844	452
Property and equipment, net	7,730	6,969
Intangible asset, net	4,767	5,092
Long-term deferred tax assets	38,636	40,475
Other assets	383	547
Total assets	186,619	178,827
CURRENT LIABILITIES:
Accounts payable	13,780	10,903
Accrued and other current liabilities	37,629	34,691
Deferred revenue	20,013	7,682
Current portion of capital lease obligations	127	124
Total current liabilities	71,549	53,400
Long-term deferred revenue	168	226
Long-term capital lease obligations, less current portion	74	138
Other non-current liabilities	858	761
Total liabilities	72,649	54,525
Commitments and contingencies (Note 6)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.01 par value: 50,000,000 shares authorized and no shares issued and outstanding at June 30, 2016 and December 31, 2015	0	0
Common stock, $0.001 par value: 500,000,000 shares authorized at June 30, 2016, and December 31, 2015; 39,578,675 and 39,217,630 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	43	43
Additional paid-in capital	222,368	215,621
Accumulated other comprehensive loss	(3,943)	(1,636)
Accumulated deficit	(104,498)	(89,726)
Total stockholders’ equity	113,970	124,302
Total liabilities and stockholders’ equity	$ 186,619	$ 178,827