v3.23.2
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Operating activities:    
Net loss $ (76,038) $ (62,112)
Adjustments to reconcile net loss to net cash used by operating activities:    
Depreciation and amortization expense 6,487 4,475
Amortization of financing lease right-of-use asset 102 117
Amortization (accretion) of interest on securities (226) 551
Non-cash lease expense 20 337
Net realized loss (gain) on investments 23 0
Stock-based compensation 7,814 10,879
Change in fair value of contingent consideration 2,218 158
Cost of leased equipment sold to customer 88 204
Changes in operating assets and liabilities:    
Accounts receivable (590) 24
Inventory (7,345) (12,095)
Prepaid expenses and other current assets 1,785 277
Other assets (587) (91)
Accounts payable (791) (2,073)
Accrued expenses and contract liabilities (2,069) (1,477)
Net cash used in operating activities (69,109) (60,826)
Investing Activities:    
Purigen acquisition, return of purchase consideration from escrow 96 694
Purchases of property and equipment (839) (371)
Purchase of available for sale securities 0 (29,541)
Sale and maturity of available for sale securities 46,879 93,475
Construction in progress (32) (1,080)
Sale of property and equipment 0 27
Net cash provided by investing activities 46,104 63,204
Financing activities:    
Principal payments on financing lease liability (22) (17)
Proceeds from sale of common stock 33,487 0
Offering expenses on sale of common stock (837) 0
Proceeds from sale of common stock under employee stock purchase plan 92 75
Proceeds from warrant and option exercises 23 152
Net cash provided by financing activities 32,743 210
Effect of exchange rates on cash, cash equivalents and restricted cash 27 0
Net decrease in cash, cash equivalents and restricted cash 9,765 2,588
Cash, cash equivalents and restricted cash at beginning of period 5,491 24,571
Cash, cash equivalents and restricted cash at end of period 15,256 27,159
Reconciliation of cash, cash equivalents and restricted cash reported within the unaudited condensed consolidated balance sheets to the total amounts reported on the unaudited condensed consolidated statements of cash flows    
Cash and cash equivalents 14,856 27,159
Restricted cash 400 0
Total cash, cash equivalents and restricted cash at end of period 15,256 27,159
Supplemental cash flow disclosures:    
Cash paid for interest 149 139
Cash paid for operating lease liabilities 1,291 695
Supplemental disclosure of non-cash investing and financing activities:    
Transfer of instruments and servers from inventory to property and equipment, net 4,615 3,890
Property and equipment included in accounts payable 104 0
Construction in Progress Expenditures Incurred but Not yet Paid 65 0
Operating lease liabilities resulting from obtaining right-of-use assets $ 0 $ 517