Condensed Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 155,564,000	$ 177,250,000
Short-term investments	42,146,000	0
Accounts receivable, net of allowances of $21,897 and $17,739 as of	183,078,000	120,553,000
Inventories	35,585,000	32,740,000
Prepaid expenses and other current assets	15,374,000	11,367,000
Deferred cost of revenue, current portion	1,188,000	3,007,000
Total current assets	432,935,000	344,917,000
Property and equipment, net	25,264,000	14,736,000
Deferred cost of revenue, non-current portion		5,403,000
Intangible assets, net	1,477,000	2,030,000
Goodwill	1,382,000	1,382,000
Other non-current assets	3,939,000	3,429,000
Total Assets	464,997,000	371,897,000
Current Liabilities:
Accounts payable	56,576,000	56,413,000
Accrued liabilities	91,986,000	72,344,000
Deferred revenue, current portion	45,442,000	34,501,000
Total current liabilities	194,004,000	163,258,000
Deferred revenue, non-current portion	19,594,000	48,511,000
Other long-term liabilities	6,748,000	7,849,000
Total Liabilities	220,346,000	219,618,000
Commitments and contingencies (Note 10)
Stockholders’ Equity:
Preferred stock, $0.0001 par value; 10,000 and 0 shares authorized as of December 31,2017 and 2016, respectively no shares issued and outstanding as of December 31,2017 and 2016, respectively
Common stock, $0.0001 par value 1,150,000 (Class A - 1,000,000 and Class B - 150,000) shares and 122,000 shares authorized as of December 31, 2017 and 2016, respectively 99,157 (Class A - 19,325 and Class B - 79,832) shares and 4,819 shares issued and outstanding as of December 31, 2017 and 2016, respectively	11,000	10,000
Additional paid-in capital	498,553,000	435,607,000
Accumulated other comprehensive loss	(17,000)
Accumulated deficit	(253,896,000)	(283,338,000)
Total stockholders’ equity	244,651,000	152,279,000
Total Liabilities and Stockholders’ Equity	$ 464,997,000	$ 371,897,000