Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 180,061	$ 218,348
Accounts receivable	28,002	21,659
Inventory, net of allowance of $1,676 and $3,071, respectively	26,080	29,617
Deposits on purchased inventory	7,153	4,778
Deferred cost of revenue	5,439	3,342
Prepaid expenses and other current assets	5,285	5,803
Total current assets	252,020	283,547
Property and equipment, net	20,357	20,242
Restricted cash	4,596	1,460
Intangible assets, net	43	44
Right-of-use assets	9,080	9,661
Other assets	11,991	6,853
TOTAL ASSETS	298,087	321,807
Current liabilities:
Accounts payable	9,252	9,199
Accrued liabilities	18,427	26,555
Customer deposits	27,377	20,784
Operating lease liability, current	2,633	2,561
Current portion of long-term debt	8,056	3,222
Deferred revenue, current	13,879	13,920
Total current liabilities	79,624	76,241
Deferred revenue, net of current portion	7,507	4,232
Long-term debt	49,282	54,031
Warrant liabilities	3,965	6,795
Operating lease liability, noncurrent	7,373	8,066
Other long-term liabilities	2,831	2,647
TOTAL LIABILITIES	150,582	152,012
Commitments and contingencies
Stockholders’ equity:
Preferred stock, par value of $0.01 per share; 10,000,000 shares authorized at March 31, 2022 and December 31, 2021; no shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	0	0
Common stock, par value of $0.01 per share; 300,000,000 shares authorized at March 31, 2022 and December 31, 2021; 180,442,026 and 179,206,456 shares issued and outstanding at March 31, 2022 and December 31, 2021, respectively	1,794	1,782
Additional paid-in capital	908,617	905,145
Accumulated deficit	(762,906)	(737,132)
TOTAL STOCKHOLDERS’ EQUITY	147,505	169,795
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 298,087	$ 321,807