Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 163,881	$ 226,783
Accounts receivable	26,548	16,817
Inventory	46,456	55,031
Deposits on purchased inventory	4,254	6,457
Deferred cost of revenue	8,705	3,466
Prepaid expenses and other current assets	4,659	3,310
Total current assets	254,503	311,864
Property and equipment, net	22,533	23,399
Restricted cash	1,460	1,404
Intangible assets, net	51	55
Right-of-use assets	10,055	11,720
Other assets	1,485	1,577
TOTAL ASSETS	290,087	350,019
Current liabilities:
Accounts payable	7,607	13,739
Accrued liabilities	17,966	21,390
Customer deposits	16,080	9,662
Operating lease liability, current	2,251	2,264
Current portion of long-term debt	15,556	1,556
Deferred revenue, current	21,838	10,457
Total current liabilities	81,298	59,068
Deferred revenue, net of current portion	2,884	3,553
Long-term debt	40,134	53,995
Warrant liabilities	4,092	5,373
Operating lease liability, noncurrent	8,816	10,479
Other long-term liabilities	1,827	1,377
TOTAL LIABILITIES	139,051	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 September 30, 2020 and December 31, 2019; no shares issued and outstanding at September 30, 2020 and December 31, 2019	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at September 30, 2020 and December 31, 2019; 147,954,426 and 147,191,695 shares issued and outstanding at September 30, 2020 and December 31, 2019	1,469	1,462
Additional paid-in capital	750,552	733,888
Accumulated deficit	(600,985)	(519,176)
TOTAL STOCKHOLDERS’ EQUITY	151,036	216,174
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 290,087	$ 350,019