CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ (3,433)	$ (3,129)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	722	815
Bad debt expense	240	13
Amortization of debt discount	0	34
Amortization of right of use asset	130	302
Loss on disposal of equipment	0	22
Common stock issued for services	274	0
Stock-based compensation	33	32
Loss on foreign currency remeasurement	4	0
Impairment charges - property and equipment	31	0
Impairment charges - goodwill	0	541	$ 541
Changes in operating assets and liabilities:
Accounts receivable	1,147	(1,679)
Inventory	(574)	377
Prepaid expenses and other current assets	(456)	(133)
Other assets	(7)	(59)
Accounts payable	766	274
Accrued expenses and other current liabilities	332	(398)
Deferred revenue	(232)	772
Lease liabilities	(212)	(320)
Net cash used in operating activities	(1,235)	(2,536)
Cash flows from investing activities:
Purchases of property and equipment	(17)	0
Net cash used in investing activities	(17)	0
Cash flows from financing activities:
Purchase of treasury stock	0	(7)
Net cash used in financing activities	0	(7)
Decrease in cash and restricted cash	(1,252)	(2,543)
Cash and restricted cash at beginning of period	5,277	4,602	4,602
Cash and restricted cash at end of period	4,025	2,059	5,277
Reconciliation of cash and restricted cash
Cash				$ 3,964	$ 5,058	$ 2,059
Current portion of restricted cash				61	158	0
Total cash and restricted cash	4,025	2,059	$ 4,602	4,025	$ 5,277	2,059
Cash paid during the period for interest	0	90
Non-cash investing and financing activities:
Issuance of preferred stock in exchange for accrued dividends	0	98
Accrued preferred stock dividends				$ 1		$ 4
Inducement to convert Series A-2 Preferred Stock to common	300	0
Common stock issued for services	$ 3	$ 0