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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 34,859 $ 15,364
Short-term investments 42,553 69,488
Accounts receivable, net 63,795 52,049
Inventory 42,007 54,573
Prepaid expenses and other current assets 10,765 13,961
Total current assets 193,979 205,435
Property and equipment, net 20,785 22,160
Right-of-use lease assets 6,069 7,645
Other assets 8,366 15,711
Total assets 229,199 250,951
Current liabilities:    
Accounts payable 1,860 3,225
Accrued clinical and manufacturing liabilities 24,740 24,468
Accrued payroll and employee liabilities 10,376 13,416
Other accrued liabilities 39,770 38,552
Current lease liabilities 2,999 2,694
Total current liabilities 79,745 82,355
Non-current lease liabilities 3,537 5,499
Non-current notes payable, net 24,023  
Non-current convertible notes payable, net 149,439 149,284
Other non-current liabilities 241 241
Total liabilities 256,985 237,379
Stockholders' equity (deficit):    
Common stock 1,411 1,191
Additional paid-in capital 1,866,094 1,807,855
Accumulated other comprehensive loss (1) (19)
Accumulated deficit (1,895,290) (1,795,455)
Total stockholders' equity (deficit) (27,786) 13,572
Total liabilities and stockholders' equity $ 229,199 $ 250,951