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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:    
Net loss applicable to common stockholders $ (9,910) $ (8,245)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Amortization and depreciation 3,873 4,033
Allowance for doubtful accounts and customer credits 641 906
Deferred income taxes   43
Stock-based compensation 2,393 2,646
Gain (or loss) on disposal of fixed assets 178  
Change in certain assets and liabilities:    
Accounts receivable, net 360 (1,280)
Prepaid expenses, other current assets, and other assets 1,152 73
Accounts payable (1,255) 675
Accrued expenses and other current liabilities (1,658) (510)
Deferred revenue and deposits (169) (633)
Net cash used in operating activities (4,395) (2,292)
Cash flows from investing activities:    
Purchases of property and equipment (1,377) (2,865)
Proceeds from sales of property and equipment 65  
Net cash (used in) provided by investing activities (1,312) (2,865)
Cash flows from financing activities:    
Settlement of a contractual obligation   (1,495)
Finance lease principal payments (185)  
Proceeds from exercises of stock options, issuance and vesting of restricted stock and employee stock purchase plan, net 25 40
Net cash used in financing activities (160) (1,455)
Net decrease in cash and cash equivalents (5,867) (6,612)
Cash and cash equivalents at beginning of period 20,474 27,086
Cash and cash equivalents at end of period 14,607 20,474
Supplemental disclosure of cash flow information:    
Foreign government paycheck assistance and rent subsidies (operating activities)   10
Cash paid for operating leases (operating activities) 1,549 1,648
Cash paid during the period for income taxes, net of refunds $ 70 55
Supplemental disclosure of non-cash investing and financing activities:    
Settlement of a contractual obligation   $ 335