CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net loss		$ (2,246)	$ (3,433)	$ (3,385)	$ (3,129)	$ (5,679)	$ (6,514)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization						1,429	1,612
Bad debt expense						449	34
Amortization of debt discount						0	45
Amortization of right of use asset						250	595
Loss on disposal of equipment						0	15
Stock-based compensation						33	61
Common stock issued for services						390	0
Loss on foreign currency remeasurement						3	(12)
Gain on extinguishment of liability						(227)	0
Impairment charges - property and equipment						48	9
Impairment charges - goodwill						0	541	$ 541
Changes in operating assets and liabilities:
Accounts receivable						1,764	1,149
Inventory						(1,205)	473
Prepaid expenses and other current assets						(702)	47
Other assets						7	(28)
Accounts payable						205	(3)
Accrued expenses and other current liabilities						408	(493)
Deferred revenue						(429)	238
Lease liabilities						(414)	(626)
Net cash used in operating activities						(3,670)	(2,857)
Cash flows from investing activities:
Purchases of property and equipment						(17)	(5)
Net cash used in investing activities						(17)	(5)
Cash flows from financing activities:
Proceeds from stock issuance, net of issuance costs	$ 11,504					11,504	0
Proceeds from PPP Loan						0	2,417
Purchase of treasury stock						0	(16)
Net cash provided by in financing activities						11,504	2,401
Increase (decrease) in cash and restricted cash						7,817	(461)
Cash and restricted cash at beginning of period			$ 5,277		$ 4,602	5,277	4,602	4,602
Cash and restricted cash at end of period	13,094	13,094		4,141		13,094	4,141	5,277
Reconciliation of cash and restricted cash
Cash	13,033	13,033		4,141		13,033	4,141	5,058
Current portion of restricted cash	61	61		0		61	0	158
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Total	13,094	13,094		4,141		13,094	4,141	$ 5,277
Cash paid during the period for interest						2	96
Non-cash investing and financing activities:
Issuance of preferred stock in exchange for accrued dividends						0	99
Accrued preferred stock dividends	$ 1	$ 1		$ 8		1	8
Inducement to convert Series A-2 Preferred Stock to common						300	0
Common stock issued for services						$ 3	$ 0