CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash flows from operating activities
Net loss		$ (9,238,000)	$ (16,721,000)	$ (17,174,000)	$ (25,025,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense				863,000	873,000
Impairment of indefinite-lived intangible assets		0	4,000,000	0	4,000,000
Loss on assignment of receivables				15,000
Loss on extinguishment of debt			2,663,000		4,605,000
Amortization of operating lease right-of-use-assets				365,000	363,000
Expense on modification of warrants				86,000
Series 3 warrants issued as an inducement to exercise equity-classified Series 1, Series 2 and Bridge warrants				3,696,000
Stock-based compensation				1,509,000	873,000
Issuance of common stock in exchange for services				37,000
Issuance of common stock as consideration paid under the Oasis Capital Equity Purchase Agreement				33,000
Amortization of debt issuance costs and debt discount				309,000	3,879,000
Change in fair value of warrants, conversion option and derivative liability				387,000	(161,000)
Changes in assets and liabilities
Accounts receivable				(2,258,000)	(1,102,000)
Other receivable				(3,000)	(87,000)
Inventory				(225,000)	949,000
Prepaid expenses and other current assets				(831,000)	248,000
Other non-current assets				58,000
Operating lease liabilities				(221,000)	(230,000)
Deferred revenue				1,500,000
Accounts payable				(76,000)	976,000
Accrued expenses				1,909,000	1,069,000
Total cash used in operating activities				(8,298,000)	(8,770,000)
Cash flows from investing activities
Purchase of equipment				(7,000)	(7,000)
Total cash used in investing activity				(7,000)	(7,000)
Cash flows from financing activities
Proceeds from issuance of notes payable, net of issuance costs and debt discount				350,000	5,050,000
Proceeds from insurance premium financing				776,000
Proceeds from sale of receivables, net of debt discount and issuance costs of $331				2,222,000
Repayment of notes payable				(1,515,000)	(100,000)
Proceeds from issuance of common stock					2,869,000
Payment of offering costs for July 2019 registered offering				(51,000)	(3,000)
Total cash provided by financing activities				7,437,000	7,816,000
Net decrease in cash				(868,000)	(961,000)
Cash at beginning of period	$ 1,607,000			3,883,000	2,568,000	$ 2,568,000
Cash at end of period		3,015,000	1,607,000	3,015,000	1,607,000	3,883,000
Supplemental schedule of cash flow information
Cash paid for interest				181,000
Supplemental schedule of non-cash financing and investing activities
Accretion to redemption value of Series A redeemable convertible preferred stock		(503,000)		(983,000)
Private Investment in Public Entities
Cash flows from financing activities
Proceeds from the issuance of convertible preferred stock				668,000
2019 Bridge Note Warrants
Cash flows from financing activities
Proceeds from issuance of common stock				173,000
Notes payable
Supplemental schedule of non-cash financing and investing activities
Common stock issued as redemption of notes payable and related interest					14,256,000
Issuance of warrants					5,006,000
Accounts payable and accrued expenses
Supplemental schedule of non-cash financing and investing activities
Offering costs included in accounts payable and accrued expenses		36,000	$ 333,000	36,000	333,000
PIPE Financing Warrants, Dec 2019
Cash flows from financing activities
Shares issued on conversion of Series 1, Series 2, and 2019 Bridge Note warrants; June 2020						$ 1,500,000
Ionic Series 2 Warrants
Cash flows from financing activities
Warrants issuance costs				(25,000)
Series 2 warrants
Cash flows from financing activities
Proceeds from issuance of common stock				708,000
Series 1 warrants
Cash flows from financing activities
Proceeds from issuance of common stock				144,000
March 2019 letter of credit warrant
Supplemental schedule of non-cash financing and investing activities
Issuance of warrants					$ 116,000
Series 1, Series 2, and 2019 Bridge Note warrants May 2020
Cash flows from financing activities
Payment of offering costs for July 2019 registered offering		(461,000)		(461,000)
Shares issued on exercise of Series 1, Series 2, and 2019 Bridge Note warrants, net of issuance costs of $461; May 2020				3,752,000
Series 1, Series 2, and 2019 Bridge Note warrants June 2020
Cash flows from financing activities
Shares issued on conversion of Series 1, Series 2, and 2019 Bridge Note warrants; June 2020				359,000
Underwriter Settlement Agreement
Adjustments to reconcile net loss to net cash used in operating activities:
Issuance of warrants and common stock in Underwriter settlement agreement				76,000
Cash flows from financing activities
Warrants issuance costs				(185,000)
Common Stock To Oasis Put Exercise
Cash flows from financing activities
Payment of offering costs for July 2019 registered offering				(13,000)
Proceeds from Issuance of Common Stock				10,000
Series B convertible preferred stock
Adjustments to reconcile net loss to net cash used in operating activities:
Series B convertible preferred stock inducement expense				1,647,000
Supplemental schedule of non-cash financing and investing activities
Conversion of Oasis Series B-2 convertible preferred stock into common stock		476,000
Shares issued on exercise of Series B convertible preferred shares				476,000
Series A convertible preferred stock
Supplemental schedule of non-cash financing and investing activities
Accretion to redemption value of Series A redeemable convertible preferred stock		$ 503,000		983,000
Oasis Series B-2 convertible preferred stock
Supplemental schedule of non-cash financing and investing activities
Conversion of Oasis Series B-2 convertible preferred stock into common stock				$ 320,000
Class B units
Cash flows from financing activities
Payment of offering costs for July 2019 registered offering	$ (1,635,000)