Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net loss	$ (1,582)	$ (4,189)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	14	17
Impairment of operating lease right-of-use assets	0	125
Non-cash (gain) loss on changes in fair value of warrant liability	(137)	57
Non-cash gain on changes in fair value of embedded derivative liability	(2)
Interest expense related to amortization of debt issuance and debt discount	105	20
Interest expense related to amortization of debt issuance related to related party notes payable	1	5
Changes in operating assets and liabilities:
Accounts receivable	113	954
Inventory	(59)	(21)
Prepaid expenses and other current assets	223	214
Operating lease right-of-use assets	224	244
Other assets	1	10
Accounts payable and accrued liabilities	(175)	(521)
Operating lease liabilities	(252)	(256)
Deferred revenue	559	(41)
Related party notes payable	47	34
Long-term obligations	(4)	3
Net cash used in operating activities	(865)	(3,221)
Investing activities:
Purchases of property and equipment		(14)
Net cash used in investing activities		(14)
Financing activities:
Proceeds from issuance of related party notes payable		1,000
Proceeds from stock options & RSUs sold to cover taxes		4
Proceeds from exercise of warrants	201
Proceeds from convertible notes, net of discount		2,000
Payment on the convertible note	(565)
Debt issuance cost		(20)
Net cash (used in) provided by financing activities	(364)	2,984
Net decrease in cash, cash equivalents, and restricted cash	(1,229)	(251)
Cash, cash equivalents and restricted cash, beginning of year	7,412	3,658
Cash, cash equivalents and restricted cash, end of year	6,183	3,407
Supplemental disclosure of cash flow information:
Interest paid	35
Addition of operating lease, right-of-use asset		2,473
Fixed asset purchases, included in accounts payable and accrued liabilities		(5)
Employees and Directors [Member] | Share-based Payment Arrangement, Option [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense for options and stock issued	45	107
Nonemployees [Member] | Share-based Payment Arrangement, Option [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense for options and stock issued	12	7
Employee [Member]
Adjustments to reconcile net loss to net cash used in operating activities:
Issuance of RSUs	2	10
Accounting Standards Update 2014-09 [Member]
Supplemental disclosure of cash flow information:
Cumulative effect of adoption of New ASU		$ 56