CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (4,539)	$ (3,433)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	627	722
Bad debt expense	111	240
Stock-based compensation	52	33
Stock-based expense for services	0	274
Forfeiture of unvested stock options	(84)	0
Loss on foreign currency remeasurement	0	4
Impairment charges - property and equipment	0	31
Impairment charges - goodwill	1,138	0
Changes in operating assets and liabilities:
Accounts receivable	183	1,147
Inventory	103	(574)
Prepaid expenses and other current assets	(360)	(456)
Right of use asset	127	130
Other assets	45	(7)
Accounts payable	294	766
Accrued expenses and other current liabilities	188	332
Deferred revenue	(126)	(232)
Lease liabilities	(163)	(212)
Net cash used in operating activities	(2,404)	(1,235)
Cash flows from investing activities:
Purchases of property and equipment	(11)	(17)
Proceeds from sale of equipment	1	0
Net cash used in investing activities	(10)	(17)
Decrease in cash and restricted cash	(2,414)	(1,252)
Cash and restricted cash at beginning of period	9,000	5,277
Cash and restricted cash at end of period	6,586	4,025
Reconciliation of cash and restricted cash
Cash	6,525	3,964
Restricted cash	61	61
Total cash and restricted cash	6,586	4,025
Non-cash investing and financing activities:
Accrued preferred stock dividends	0	1
Inducement to convert Series A-2 Preferred Stock to common	0	300
Common stock issued for conversion of Preferred Stock	$ 0	$ 3