CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (3,205)	$ (1,652)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Depreciation and amortization	281	277
Amortization of operating lease right-of-use asset	56	61
Amortization of finance lease right-of-use asset	17	15
Amortization (accretion) of deferred financing costs, debt discounts and debt premiums	664	(100)
Gain on settlement of liability, net		(167)
Loss on extinguishment of convertible notes	1,225
Stock-based compensation	168	156
Provision for losses on doubtful accounts	268	204
Warrant revaluation	(936)	(240)
Derivative revaluation		(23)
Changes in operating assets and liabilities:
Accounts receivable	(577)	(315)
Inventories	(11)	48
Other assets	75	86
Accounts payable	250	(425)
Operating lease liabilities	(51)	(58)
Accrued expenses and other liabilities	187	254
Net cash used in operating activities	(1,589)	(1,879)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(24)	(3)
Net cash used in investing activities	(24)	(3)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on finance lease obligations	(23)	(14)
Issuance of common stock, net of issuance costs	1,350	1,726
Proceeds from convertible notes		250
Principal payments on convertible notes		(50)
Principal payments on long-term debt	(145)	(109)
Net cash flows provided by financing activities	1,182	1,803
NET CHANGE IN CASH	(431)	(79)
CASH AT BEGINNING OF PERIOD	848	381	$ 381
CASH AT END OF PERIOD	417	302	$ 848
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for interest	8	8
SUPPLEMENTAL DISCLOSURE OF CONSULTING SERVICES OR ANY OTHER NON-CASH COMMON STOCK RELATED ACTIVITY
Conversion of interest on convertible debt into common stock	325	2,933
Conversion of interest on convertible debt into common stock	28	193
Liabilities exchanged for convertible notes		2,150
Write-off of beneficial conversion feature in conjunction with convertible note extinguishment	523
Right-of-use assets obtained in exchange for lease obligations	0	750
Write-off of debt discounts (net of debt premiums) in conjunction with convertible note conversions	$ 63	315
Write-off of derivative liability in conjunction with convertible note conversions		$ 39