Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 49,301	$ 14,198
Accounts receivable	3,272	4,200
Inventory	10,216	8,082
Deposits on purchased inventory	4,473	2,522
Deferred cost of revenue	6,250	3,909
Prepaid expenses and other current assets	4,698	3,023
Total current assets	78,210	35,934
Property and equipment, net	11,353	11,560
Restricted cash	1,143	1,143
Intangible assets, net	92	97
Other assets	30	30
TOTAL ASSETS	90,828	48,764
Current liabilities:
Accounts payable	5,561	4,980
Accrued liabilities	6,322	6,334
Customer deposits	21,400	19,400
Deferred revenue, current portion	10,291	6,515
Total current liabilities	43,574	37,229
Deferred revenue, net of current portion	3,623	3,918
Long-term debt	44,368	44,290
Warrant liabilities	21,327	2,723
Other long-term liabilities	4,973	4,257
TOTAL LIABILITIES	117,865	92,417
Commitments and contingencies (Note 6)
Stockholders’ deficit:
Preferred stock, par value of $0.01 per share; 10,000,000 shares authorized at March 31, 2017 and December 31, 2016; no shares issued and outstanding at March 31, 2017 and December 31, 2016
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at March 31, 2017 and December 31, 2016; 56,086,583 and 43,581,184 shares issued and outstanding at March 31, 2017 and December 31, 2016	551	426
Additional paid-in capital	248,050	203,598
Accumulated deficit	(275,638)	(247,677)
TOTAL STOCKHOLDERS’ DEFICIT	(27,037)	(43,653)
TOTAL LIABILITIES AND STOCKHOLDERS’ DEFICIT	$ 90,828	$ 48,764