Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 145,797	$ 167,432
Accounts receivable	27,432	36,867
Inventory	65,140	49,462
Deposits on purchased inventory	7,642	8,142
Deferred cost of revenue	4,342	9,736
Prepaid expenses and other current assets	9,060	6,045
Total current assets	259,413	277,684
Property and equipment, net	15,279	13,958
Restricted cash	1,382	1,933
Right-of-use assets	12,055	0
Other assets	1,496	1,395
TOTAL ASSETS	289,625	294,970
Current liabilities:
Accounts payable	17,891	10,207
Accrued liabilities	16,207	9,983
Customer deposits	14,905	19,968
Operating lease liability, current	1,284	0
Deferred revenue, current	10,287	13,731
Total current liabilities	60,574	53,889
Deferred revenue, net of current portion	5,507	5,744
Long-term debt	55,402	55,364
Warrant liabilities	14,872	11,844
Operating lease liability, noncurrent	11,491	0
Other long-term liabilities	303	820
TOTAL LIABILITIES	148,149	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 March 31, 2019 and December 31, 2018; no shares issued and outstanding at March 31, 2019 and December 31, 2018	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at March 31, 2019 and December 31, 2018; 96,933,098 and 96,332,023 shares issued and outstanding at March 31, 2019 and December 31, 2018	959	952
Additional paid-in capital	572,855	565,334
Accumulated deficit	(432,338)	(398,977)
TOTAL STOCKHOLDERS’ EQUITY	141,476	167,309
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 289,625	$ 294,970