Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 179,514	$ 226,783
Accounts receivable	22,089	16,817
Inventory	48,197	55,031
Deposits on purchased inventory	4,643	6,457
Deferred cost of revenue	6,273	3,466
Prepaid expenses and other current assets	5,568	3,310
Total current assets	266,284	311,864
Property and equipment, net	22,718	23,399
Restricted cash	1,860	1,404
Intangible assets, net	53	55
Right-of-use assets	10,621	11,720
Other assets	1,642	1,577
TOTAL ASSETS	303,178	350,019
Current liabilities:
Accounts payable	4,852	13,739
Accrued liabilities	17,361	21,390
Customer deposits	16,047	9,662
Operating lease liability, current	2,347	2,264
Current portion of long-term debt	10,889	1,556
Deferred revenue, current	16,788	10,457
Total current liabilities	68,284	59,068
Deferred revenue, net of current portion	3,069	3,553
Long-term debt	44,756	53,995
Warrant liabilities	2,072	5,373
Operating lease liability, noncurrent	9,293	10,479
Other long-term liabilities	1,680	1,377
TOTAL LIABILITIES	129,154	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 June 30, 2020 and December 31, 2019; no shares issued and outstanding at June 30, 2020 and December 31, 2019	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at June 30, 2020 and December 31, 2019; 147,616,373 and 147,191,695 shares issued and outstanding at June 30, 2020 and December 31, 2019	1,466	1,462
Additional paid-in capital	745,418	733,888
Accumulated deficit	(572,860)	(519,176)
TOTAL STOCKHOLDERS’ EQUITY	174,024	216,174
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 303,178	$ 350,019