v3.25.1
Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities:    
Net loss $ (10,261) $ (9,526)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,096 1,111
Lease right-of-use asset amortization 181 116
Net book value of consigned equipment sold   11
Loss on disposal of property and equipment 47  
Stock-based compensation 3,039 3,015
Credit loss recovery   130
Change in excess/obsolete inventory reserve 65  
Amortization of discounts on investments (884) (1,983)
Changes in operating assets and liabilities:    
Accounts receivable (839) (343)
Inventory 531 169
Prepaid expense and other current assets 65 689
Other assets (254) 33
Accounts payable, accrued expenses and other (5,589) (3,286)
Operating lease liability (278) (103)
Deferred revenue (1,326) (593)
Other liabilities (4) (4)
Net cash used in operating activities (14,411) (10,564)
Cash flows from investing activities:    
Purchases of investments (34,645) (48,042)
Maturities of investments 46,600 34,450
Purchases of property and equipment (653) (804)
Acquisition of business, net of cash acquired of $541 (1,773)  
Net cash provided by (used in) investing activities 9,529 (14,396)
Cash flows from financing activities:    
Proceeds from exercise of stock options 383 703
Net cash provided by financing activities 383 703
Net (decrease) increase in cash and cash equivalents (4,499) (24,257)
Cash and cash equivalents, beginning of period 27,884 46,506
Cash and cash equivalents, end of period $ 23,385 22,249
Supplemental disclosure of non-cash investing and financing activities:    
Property and equipment purchases included in accounts payable and accrued expenses   $ 16