Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 14,198	$ 20,667
Accounts receivable	4,200	830
Inventory	8,082	8,073
Deposits on purchased inventory	2,522	3,936
Deferred cost of revenue	3,909	8,782
Prepaid expenses and other current assets	3,023	1,329
Total current assets	35,934	43,617
Property and equipment, net	11,560	7,306
Restricted cash	1,143	943
Intangible assets, net	97	200
Other assets	30	91
TOTAL ASSETS	48,764	52,157
Current liabilities:
Accounts payable	4,980	4,358
Accrued liabilities	6,334	5,413
Customer deposits	19,400	12,763
Deferred revenue, current portion	6,515	5,616
Total current liabilities	37,229	28,150
Long-term debt	44,290	29,016
Warrant liability	2,723
Deferred revenue, net of current portion	3,918	345
Other long-term liabilities	4,257	1,603
TOTAL LIABILITIES	92,417	59,114
Commitments and contingencies (Note 7)
Stockholders’ deficit:
Convertible preferred stock, par value $0.01 per share; 10,000,000 shares authorized at December 31, 2016 and 2015; no shares issued and outstanding at December 31, 2016 and 2015
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at December 31, 2016 and 2015; 43,581,184 and 38,204,960 shares issued and outstanding at December 31, 2016 and 2015	426	372
Additional paid-in capital	203,598	189,712
Accumulated deficit	(247,677)	(197,041)
TOTAL STOCKHOLDERS’ DEFICIT	(43,653)	(6,957)
TOTAL LIABILITIES AND STOCKHOLDERS’ DEFICIT	$ 48,764	$ 52,157