Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 50,438	$ 90,541
Short-term investments	71,308	67,039
Accounts receivable, net	42,188	35,499
Inventory	52,239	48,382
Prepaid expenses and other current assets	7,631	12,962
Total current assets	223,804	254,423
Property and equipment, net	22,619	23,734
Right-of-use lease assets	8,204	9,829
Other assets	17,325	17,720
Total assets	271,952	305,706
Current liabilities:
Accounts payable	6,547	3,803
Accrued clinical and manufacturing liabilities	37,298	23,716
Accrued payroll and employee liabilities	14,708	15,263
Other accrued liabilities	32,703	25,859
Current lease liabilities	2,620	2,417
Total current liabilities	93,876	71,058
Non-current lease liabilities	6,151	7,996
Non-current convertible notes payable, net	149,234	149,082
Other non-current liabilities	241
Total liabilities	249,502	228,136
Stockholders’ equity:
Common stock	1,188	1,020
Additional paid-in capital	1,796,905	1,689,987
Accumulated other comprehensive loss	(57)	(6)
Accumulated deficit	(1,775,586)	(1,613,431)
Total stockholders’ equity	22,450	77,570
Total liabilities and stockholders’ equity	$ 271,952	$ 305,706