Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (6,510,000)	$ (1,475,000)	$ (11,253,000)	$ (3,521,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization			392,000	402,000
Stock based compensation expense			381,000	206,000
Amortization of debt discount/premium, net			1,257,000	1,229,000
Amortization of accelerated debt discount due to conversion			2,486,000
Reserve for excess and slow-moving inventories			3,744,000	125,000
Loss on disposal of equipment			114,000	6,000
Net change in operating assets and liabilities:
Accounts receivable			(378,000)	(1,582,000)
Inventories			(5,108,000)	449,000
Prepaid expenses and other assets			(65,000)	(165,000)
Accounts payable			1,812,000	749,000
Interest payable - related party			(912,000)	(586,000)
Accrued payroll and related expenses			238,000	(217,000)
Deferred revenue – short-term			167,000	92,000
Other current liabilities			(1,607,000)	(37,000)
Long-term deferred revenue and other noncurrent liabilities			(221,000)	(61,000)
Net cash used in operating activities			(8,953,000)	(2,911,000)
Cash flows from investing activities:
Capital expenditures			(23,000)	(142,000)
Net cash used in investing activities			(23,000)	(142,000)
Cash flows from financing activities:
Proceeds from convertible promissory note-related party			4,287,000	1,513,000
Payments on financing lease obligations			(22,000)	(15,000)
Proceeds from issuance of common stock, net of expenses			5,214,000	756,000
Proceeds from exercise of options, warrants and pre-funded warrants			1,683,000	23,000
Proceeds from long-term debt				800,000
Proceeds from note payable			646,000
Net cash provided by financing activities			11,808,000	3,077,000
Effects of foreign currency rate changes on cash and cash equivalents			(5,000)
Net increase (decrease) in cash, cash equivalents and restricted cash			2,827,000	24,000
Cash, cash equivalents and restricted cash at beginning of period			4,157,000	3,400,000	$ 3,400,000
Cash, cash equivalents and restricted cash at end of period	$ 6,984,000	$ 3,424,000	6,984,000	3,424,000	$ 4,157,000
Supplemental disclosures of cash flow information:
Cash paid for interest			2,031,000	1,668,000
Supplemental non-cash financing and investing information:
Recording of beneficial conversion feature on debt			4,981,000	2,313,000
Right-to-use asset acquired under operating lease				966,000
Transfer of equipment to inventories				33,000
Conversion of Related Party Convertible Promissory Note Into Common Stock [Member]
Supplemental non-cash financing and investing information:
Promissory note converted to common stock			3,000,000
Conversion of January 2019 Amended Notes to Common Stock [Member]
Supplemental non-cash financing and investing information:
Promissory note converted to common stock			$ 369,000