Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 57,389	$ 14,198
Accounts receivable	20,326	4,200
Inventory	19,375	8,082
Deposits on purchased inventory	7,043	2,522
Deferred cost of revenue	13,696	3,909
Prepaid expenses and other current assets	4,862	3,023
Total current assets	122,691	35,934
Property and equipment, net	11,564	11,560
Restricted cash	1,143	1,143
Intangible assets, net	78	97
Other assets	235	30
TOTAL ASSETS	135,711	48,764
Current liabilities:
Accounts payable	11,014	4,980
Accrued liabilities	7,207	6,334
Customer deposits	17,820	19,400
Deferred revenue, current portion	20,151	6,515
Total current liabilities	56,192	37,229
Deferred revenue, net of current portion	3,238	3,918
Long-term debt	44,504	44,290
Warrant liability	22,420	2,723
Other long-term liabilities	7,370	4,257
TOTAL LIABILITIES	133,724	92,417
Commitments and contingencies (Note 7)
Stockholders’ equity (deficit):
Convertible preferred stock, par value $0.01 per share; 10,000,000 shares authorized at December 31, 2017 and 2016; no shares issued and outstanding at December 31, 2017 and 2016	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at December 31, 2017 and 2016; 67,653,974 and 43,581,184 shares issued and outstanding at December 31, 2017 and 2016	666	426
Additional paid-in capital	321,174	203,598
Accumulated deficit	(319,853)	(247,677)
TOTAL STOCKHOLDERS’ EQUITY (DEFICIT)	1,987	(43,653)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)	$ 135,711	$ 48,764