Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 35,710	$ 28,649
Short-term investments	12,867	16,286
Accounts receivable, net	33,359	21,472
Inventory	28,095	15,536
Prepaid expenses and other current assets	11,771	7,060
Total current assets	121,802	89,003
Long-term investments	3,490	4,805
Restricted cash	452	560
Property and equipment, net	6,969	3,724
Intangible asset, net	5,092	5,780
Long-term deferred tax assets	40,475	0
Other assets	547	33
Total assets	178,827	103,905
CURRENT LIABILITIES:
Accounts payable	10,903	5,824
Accrued and other current liabilities	34,691	21,450
Deferred revenue	7,682	5,069
Current portion of capital lease obligations	124	120
Total current liabilities	53,400	32,463
Long-term deferred revenue	226	622
Long-term capital lease obligations, less current portion	138	262
Other non-current liabilities	761	39
Total liabilities	$ 54,525	$ 33,386
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.01 par value: 50,000,000 shares authorized and no shares issued and outstanding at December 31, 2015, and December 31, 2014	$ 0	$ 0
Common stock, $0.001 par value: 500,000,000 shares authorized at December 31, 2015, and December 31, 2014; 39,217,630 and 38,123,998 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	43	42
Additional paid-in capital	215,621	202,701
Accumulated other comprehensive loss	(1,636)	(696)
Accumulated deficit	(89,726)	(131,528)
Total stockholders’ equity	124,302	70,519
Total liabilities and stockholders’ equity	$ 178,827	$ 103,905