Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 167,432	$ 57,389
Accounts receivable	36,867	20,326
Inventory	49,462	19,375
Deposits on purchased inventory	8,142	7,043
Deferred cost of revenue	9,736	13,696
Prepaid expenses and other current assets	6,045	4,862
Total current assets	277,684	122,691
Property and equipment, net	13,958	11,564
Restricted cash	1,933	1,143
Intangible assets, net	0	78
Other assets	1,395	235
TOTAL ASSETS	294,970	135,711
Current liabilities:
Accounts payable	10,207	11,014
Accrued liabilities	9,983	7,207
Customer deposits	19,968	17,820
Deferred revenue, current portion	13,731	20,151
Total current liabilities	53,889	56,192
Deferred revenue, net of current portion	5,744	3,238
Long-term debt	55,364	44,504
Warrant liability	11,844	22,420
Other long-term liabilities	820	7,370
TOTAL LIABILITIES	127,661	133,724
Commitments and contingencies (Note 6)	0	0
Stockholders’ equity:
Convertible preferred stock, par value $0.01 per share; 10,000,000 shares authorized at December 31, 2018 and 2017; no shares issued and outstanding at December 31, 2018 and 2017	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at December 31, 2018 and 2017; 96,332,023 and 67,653,974 shares issued and outstanding at December 31, 2018 and 2017	952	666
Additional paid-in capital	565,334	321,174
Accumulated deficit	(398,977)	(319,853)
TOTAL STOCKHOLDERS’ EQUITY	167,309	1,987
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 294,970	$ 135,711