Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 90,756	$ 167,432
Accounts receivable	33,301	36,867
Inventory	59,622	49,462
Deposits on purchased inventory	4,883	8,142
Deferred cost of revenue	3,056	9,736
Prepaid expenses and other current assets	4,672	6,045
Total current assets	196,290	277,684
Property and equipment, net	23,437	13,958
Restricted cash	1,442	1,933
Intangible assets, net	57	0
Right-of-use assets	12,254	0
Other assets	2,255	1,395
TOTAL ASSETS	235,735	294,970
Current liabilities:
Accounts payable	11,648	10,207
Accrued liabilities	18,835	9,983
Customer deposits	10,746	19,968
Operating lease liability, current	2,139	0
Deferred revenue, current	9,644	13,731
Total current liabilities	53,012	53,889
Deferred revenue, net of current portion	4,516	5,744
Long-term debt	55,489	55,364
Warrant liabilities	3,194	11,844
Operating lease liability, noncurrent	11,067	0
Other long-term liabilities	562	820
TOTAL LIABILITIES	127,840	127,661
Commitments and contingencies (Note 6)	0	0
Stockholders’ equity:
Convertible preferred stock, par value of $0.01 per share; 10,000,000 shares authorized at September 30, 2019 and December 31, 2018; no shares issued and outstanding at September 30, 2019 and December 31, 2018	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at September 30, 2019 and December 31, 2018; 99,405,805 and 96,332,023 shares issued and outstanding at September 30, 2019 and December 31, 2018	984	952
Additional paid-in capital	590,878	565,334
Accumulated deficit	(483,967)	(398,977)
TOTAL STOCKHOLDERS’ EQUITY	107,895	167,309
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 235,735	$ 294,970