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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:        
Net loss $ (9,130) $ (8,344) $ (17,251) $ (17,747)
Adjustments to reconcile net loss to net cash provided by operating activities:        
Depreciation and amortization     1,689 1,630
Stock-based compensation     8,809 7,417
Amortization of deferred income     (585) (588)
Loss from equity method investment 780 725 1,595 1,484
Net accretion of discounts on available-for-sale securities     (221) (344)
Other, net     378 24
Changes in operating assets and liabilities:        
Accounts receivable, net     1,855 3,055
Prepaid expenses and other assets     (2,261) 865
Accounts payable     319 156
Accrued expenses and other liabilities     (277) 103
Deferred revenue     6,325 4,733
Net cash provided by operating activities     375 788
CASH FLOWS FROM INVESTING ACTIVITIES:        
Purchases of property and equipment     (538) (243)
Purchases of available-for-sale securities     (17,160) (12,981)
Proceeds from maturities of available-for-sale securities and other     18,282 20,769
Net cash provided by investing activities     584 7,545
CASH FLOWS FROM FINANCING ACTIVITIES:        
Principal payments under vendor financing arrangements     (558) (485)
Proceeds from exercise of stock options     1,452 584
Proceeds from employee stock purchase plan     535 0
Other financing activities     27 0
Net cash provided by financing activities     1,456 99
NET INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH     2,415 8,432
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period     14,072 14,084
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period 16,487 22,516 16,487 22,516
Cash, cash equivalents and restricted cash at end of period:        
Cash and cash equivalents 16,100 22,128 16,100 22,128
Restricted cash, current 97 0 97 0
Restricted cash, noncurrent 290 388 290 388
Cash, cash equivalents and restricted cash at end of period $ 16,487 $ 22,516 16,487 22,516
Noncash activities:        
Purchase of property and equipment through vendor financing     1,099 0
Operating lease right-of-use assets, exchanged for lease obligations     $ 1,118 $ 0