v3.26.1
Consolidated Statements of Cash Flows - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Cash flow from operating activities:            
Net loss $ (7,663,000) $ (9,920,000) $ (18,274,000) $ (23,779,000)    
Adjustments to reconcile net loss to net cash used in operating activities:            
Debt issuance costs     319,000      
Change in fair value of loan facility     (409,000) (155,000)    
Change in fair value of warrant liabilities     601,000 (1,532,000)    
Depreciation and amortization     1,232,000 1,073,000    
Stock-based compensation     3,089,000 5,369,000    
Non-cash lease expense     473,000 438,000    
Loss on fixed asset disposal     241,000 343,000    
Loss on patent disposal     2,000 6,000    
Remeasurement and foreign currency transaction loss     19,000      
Excess and obsolete inventory related charges 65,000 230,000 122,000 543,000    
Provision for credit losses     14,000 (6,000)    
Amortization of premium of marketable securities     (120,000) (193,000)    
Non-cash changes in the fair value of NQDC plan     154,000 (1,097,000)    
Changes in operating assets and liabilities:            
Trade and other receivables     (794,000) 1,373,000    
Prepaids and other current assets     (811,000) 375,000    
Inventory     1,517,000 (810,000)    
Corporate-owned life insurance ("COLI") asset     187,000 406,000    
Other long-term assets     17,000 (294,000)    
Accounts payable and accrued expenses     (2,548,000) 901,000    
Accrued wages and fringe benefits     1,008,000 (2,510,000)    
Current non-qualified deferred compensation liability     496,000 (1,709,000)    
Other current liabilities     430,000 (403,000)    
Operating lease liability     (313,000) (467,000)    
Non-qualified deferred compensation plan liability     (203,000) 1,607,000    
Contract liabilities     (17,000) (17,000)    
Net cash used in operating activities     (13,568,000) (20,538,000) $ (31,200,000) $ (48,900,000)
Cash flow from investing activities:            
Purchase of marketable securities     (3,937,000) (3,460,000)    
Maturities of marketable securities     10,000,000 22,000,000    
Purchase of plant and equipment     (127,000) (745,000)    
Patent filing fees     (6,000) (13,000)    
Net cash provided by investing activities     5,930,000 17,782,000    
Cash flow from financing activities:            
Proceeds from loan facility, net of issuance costs     49,081,000      
Repayment of Previous Credit Agreement     (42,984,000)      
Proceeds from exercise of stock options     0 374,000    
Employee stock purchase plan ("ESPP") purchases     437,000 548,000    
Net cash provided by financing activities     6,534,000 922,000    
Net decrease in cash and cash equivalents     (1,104,000) (1,834,000)    
Cash and cash equivalents beginning of the period     10,243,000 14,050,000 14,050,000  
Cash and cash equivalents end of the period 9,139,000 $ 12,216,000 9,139,000 12,216,000 $ 10,243,000 $ 14,050,000
Supplemental Disclosure of Cash Flow Information:            
Income taxes paid during the period     44,000      
Interest paid during the period     2,875,000 2,479,000    
Non-cash investing activities:            
Capital expenditures not yet paid     11 $ 169    
Non-cash financing activities:            
Exercise of penny warrants     718,000      
Warrant liability recognized upon issuance of loan facility     1,043,000      
Reclassification of warrant liability to equity due to issuance $ 1,290,000   $ 1,290,000