Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 32,064	$ 11,129
Accounts receivable	1	904
Inventory	9,649	8,238
Deposits on purchased inventory	5,021	2,798
Deferred cost of revenue	4,303	4,712
Prepaid expenses and other current assets	1,290	626
Total current assets	52,328	28,407
Property and equipment, net	5,296	2,931
Restricted cash	553	1,053
Intangible assets, net	139	264
Deferred offering costs		1,419
Other assets	61	31
TOTAL ASSETS	58,377	34,105
Current liabilities:
Accounts payable	1,625	6,134
Accrued liabilities	5,014	4,436
Customer deposits	11,412	6,100
Deferred revenue, current portion	5,249	7,361
Long-term debt, current portion		5,493
Notes payable		240
Total current liabilities	23,300	29,764
Long-term debt, net of current portion	27,543	9,149
Convertible preferred stock warrant liability		138
Deferred revenue, net of current portion	374
Other long-term liabilities	650	567
TOTAL LIABILITIES	$ 51,867	$ 39,618
Commitments and contingencies (Note 8)
Convertible preferred stock, par value $0.01 per share; 80,710,997 and 74,460,997 shares authorized at September 30, 2015 (unaudited) and December 31, 2014; nil and 27,654,928 shares issued and outstanding at September 30, 2015 (unaudited) and December 31, 2014; aggregate liquidation preference of nil and $146,732 at September 30, 2015 (unaudited) and December 31, 2014		$ 145,110
Stockholders’ equity (deficit):
Common stock, par value of $0.01 per share; 90,000,000 and 88,000,000 shares authorized at September 30, 2015 (unaudited) and December 31, 2014; 38,200,088 and 907,037 shares issued and outstanding at September 30, 2015 (unaudited) and December 31, 2014	$ 372	9
Additional paid-in capital	189,073	1,414
Accumulated deficit	(182,935)	(152,046)
TOTAL STOCKHOLDERS’ EQUITY (DEFICIT)	6,510	(150,623)
TOTAL LIABILITIES, CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT)	$ 58,377	$ 34,105