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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:    
Net loss (including noncontrolling interests) $ (7,268) $ (6,282)
Bad debt expense 157 77
Depreciation and amortization 632 767
Amortization of operating lease right-of-use assets 505 405
Loss on disposal of property and equipment 5
Changes in operating assets and liabilities:    
Accounts receivable and unbilled revenue, net 434 (394)
Projects in process 8
Inventory (1,440) (91)
Prepaid expenses and other current assets 247 (375)
Accounts payable and accrued expenses (406) 444
Deferred revenues (28) 64
Operating lease obligations (511) (380)
Net cash used in operating activities (7,678) (5,752)
Cash flows from investing activities:    
Purchase of property and equipment (67) (60)
Sale of investment in joint venture 2
Net cash used in investing activities (67) (58)
Cash flow from financing activities:    
Proceeds from issuance of preferred and common stock, net of offering costs 15,062 13,530
Preferred dividends (33)
Proceeds from short-term borrowings 966
Proceeds from short-term tax credits 542
Payments on short-term borrowings (516)
Payments on short-term tax credits (557)
Principal payments on finance lease obligations (487) (321)
Net cash provided by financing activities 14,575 13,611
Effect of exchange rate changes on cash 80 315
Net change in cash 6,910 8,116
Cash at beginning of year 10,473 2,357
Cash at end of year 17,383 10,473
Supplemental disclosure of cash flow information:    
Cash paid for interest 15 27
Cash paid for income taxes 146 59
Supplemental disclosure of non-cash investing and financing activities:    
Short-term borrowings and accrued interest settled for Series C-2 Preferred Stock 516
Right-of-use asset obtained in exchange for lease obligations $ 239 $ 864