Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 190,208	$ 226,783
Accounts receivable	21,490	16,817
Inventory	55,031	55,031
Deposits on purchased inventory	4,235	6,457
Deferred cost of revenue	3,554	3,466
Prepaid expenses and other current assets	5,849	3,310
Total current assets	280,367	311,864
Property and equipment, net	23,570	23,399
Restricted cash	1,860	1,404
Intangible assets, net	54	55
Right-of-use assets	11,175	11,720
Other assets	1,717	1,577
TOTAL ASSETS	318,743	350,019
Current liabilities:
Accounts payable	7,232	13,739
Accrued liabilities	16,310	21,390
Customer deposits	16,307	9,662
Operating lease liability, current	2,332	2,264
Current portion of long-term debt	6,222	1,556
Deferred revenue, current	9,861	10,457
Total current liabilities	58,264	59,068
Deferred revenue, net of current portion	3,193	3,553
Long-term debt	49,375	53,995
Warrant liabilities	2,504	5,373
Operating lease liability, noncurrent	9,865	10,479
Other long-term liabilities	1,528	1,377
TOTAL LIABILITIES	124,729	133,845
Commitments and contingencies (Note 6)	0	0
Stockholders’ equity:
Preferred stock, par value of $0.01 per share; 10,000,000 shares authorized at March 31, 2020 and December 31, 2019; no shares issued and outstanding at March 31, 2020 and December 31, 2019	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at March 31, 2020 and December 31, 2019; 147,396,985 and 147,191,695 shares issued and outstanding at March 31, 2020 and December 31, 2019	1,464	1,462
Additional paid-in capital	739,258	733,888
Accumulated deficit	(546,708)	(519,176)
TOTAL STOCKHOLDERS’ EQUITY	194,014	216,174
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 318,743	$ 350,019