CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 74,690	$ 121,853
Grants receivable	204	131
Accounts receivable	170	0
Inventory	4,434	214
Vendor deposits	9,843	2,390
Notes receivable	67	0
Prepaid and other current assets	2,334	2,779
Total current assets	91,742	127,367
Property and equipment, net	8,392	5,653
Intangible assets, net	300	320
Goodwill	4,331	0
Investment in joint venture	0	3,736
Security deposits	840	825
Notes receivable, long term	4,055	100
Other assets	194	263
Total assets	109,854	138,264
Current liabilities
Accounts payable and accrued expenses	15,161	8,471
Accounts payable and accrued expenses - related parties	0	2,517
Provision for firm purchase commitments	2,030	1,585
Capital lease, current portion	9	11
Long-term debt, current portion	6,082	924
Contract liabilities	1,340	77
Total current liabilities	24,622	13,585
Long term liabilities
Deferred rent	785	762
Capital lease	0	4
Long-term debt	13,540	427
Warrants liability	2,340	2,701
Total long term liabilities	16,665	3,894
Total liabilities	41,287	17,479
COMMITMENTS AND CONTINGENCIES (NOTE 9)
SHAREHOLDERS' EQUITY
Common Stock, $0.0001 par value, 200,000,000 shares authorized, 53,353,858 and 48,943,082 shares outstanding at June 30, 2021 and December 31, 2020, respectively	5	5
Contingently Issuable Common Stock	0	17,600
Preferred stock, $0.0001 par value, 1,000,000 shares authorized, no shares outstanding at June 30, 2021 and December 31, 2020	0	0
Additional paid in capital	436,372	395,491
Accumulated deficit	(367,810)	(292,311)
Total shareholders' equity	68,567	120,785
Total liabilities and shareholders’ equity	$ 109,854	$ 138,264