Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES:
Net loss	$ (3,179)	$ (3,325)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property and equipment	24	29
Amortization of intangibles and license and supply agreement	176	134
Non-cash stock-based compensation, including stock options and restricted stock	1,332	985
Loss on extinguishment of debt		199
Inventory reserve	37	70
Allowance for doubtful accounts reserve	15	40
Amortization of debt discount		34
Change in fair value of contingent consideration	(156)
Accretion of contingent consideration	51
Loss on disposal of equipment		10
Loss on capital lease termination		11
Loss on foreign currency transactions	4	3
(Increase) decrease in operating assets:
Accounts receivable	392	(391)
Inventory	(735)	(1,082)
Prepaid expenses and other current assets	(265)	(284)
Operating right-of-use assets and operating lease liabilities	51
Other assets	(21)
Increase (decrease) in operating liabilities:
Accounts payable	119	(130)
Accrued expenses	(121)	35
Net cash used in operating activities	(2,276)	(3,662)
INVESTING ACTIVITIES:
Purchase of equipment	(14)
Acquisition of Aether, net of cash acquired	(137)	(991)
Net cash used in investing activities	(151)	(991)
FINANCING ACTIVITIES:
Proceeds from issuance of common stock, net of equity issuance costs of $8 and $19, respectively	1,992	3,778
Net (payments) proceeds from secured revolving credit facility	(431)	280
Proceeds from sale of subsidiary preferred shares to noncontrolling interest		3,000
Proceeds from equipment financing	14
Principal payments on equipment financing debt	(2)
Payments on secured note payable	(214)	(149)
Payment of contingent consideration	(94)
Proceeds from issuance of secured note		1,187
Repayment of unsecured long term note payable		(1,187)
Proceeds from exercise of warrants	731	138
Proceeds from exercise of stock options	21
Net cash provided by financing activities	2,017	7,047
Effect of exchange rates on cash	(5)	(7)
Net (decrease) increase in cash	(415)	2,387
Cash, beginning of year	4,581	2,194
Cash, end of year	4,166	4,581
Supplemental disclosure of cash flow information
Cash paid for interest expense	139	150
Cash paid for income taxes	5	4
Supplemental disclosure of noncash investing and financing activities
Right-of-use asset obtained in exchange for lease liability	800
Fair value of contingent consideration related to the Aether Acquisition		499
Reclassification of capital lease to equipment		$ 39