Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 23,187	$ 20,536
Investment securities, available-for-sale	44,544	62,173
Restricted cash, current	3,263	0
Accounts receivable, net	506	0
Contract assets	192	0
Inventory	3,116	1,861
Advance to Ibeo	0	4,132
Other current assets	2,182	2,306
Total current assets	76,990	91,008
Property and equipment, net	10,284	6,830
Operating lease right-of-use asset	14,746	14,579
Restricted cash	961	1,418
Intangible assets, net	19,000	75
Other assets	1,281	1,086
Total assets	123,262	114,996
Current liabilities
Accounts payable	3,629	2,061
Accrued liabilities	4,223	2,058
Accrued liability for Ibeo business combination	6,191	0
Contract liabilities	5,676	4,601
Current portion of operating lease liability	2,210	1,846
Current portion of finance lease obligations	15	21
Other current liabilities	211	839
Total current liabilities	22,155	11,426
Operating lease liability, net of current portion	13,729	13,829
Deferred tax liabilities	823	0
Other long-term liabilities	17	0
Total liabilities	36,724	25,255
Commitments and contingencies (Note 10)
Shareholders' equity
Preferred stock, par value $0.001; 25,000 shares authorized; zero and zero shares issued and outstanding	0	0
Common stock, par value $0.001; 210,000 shares authorized; 176,026 and 170,503 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively	176	171
Additional paid-in capital	787,856	772,221
Accumulated other comprehensive loss	57	(127)
Accumulated deficit	(701,551)	(682,524)
Total shareholders' equity	86,538	89,741
Total liabilities and shareholders' equity	$ 123,262	$ 114,996