UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows From Operating Activities:
Net Loss	$ (23,733)	$ (22,227)
Adjustments To Reconcile Net Loss To Net Cash Used In Operating Activities:
Depreciation and Amortization	535	614
Stock-based Compensation	558	(276)
Warrant Modification Expense	0	837
Increase in Inventory Reserves	89	305
Amortization of Right of Use Asset	1,312	1,090
Amortization of Debt Financing Costs and Accretion of Debt Discount	276	200
Loss on Disposal of Assets	7	7
Realized Loss (Gain) on Sale of Investments Available-for-Sale	1	(8)
Foreign Currency Translation Adjustment	3	7
Changes in Assets and Liabilities:
(Increase) Decrease in Accounts Receivable, net	(1,865)	74
Increase in Inventory	(554)	(953)
Decrease in Prepaid and Other Assets	1,760	161
Increase in Accounts Payable	679	1,172
Decrease in Settlement Payable	0	(104)
Decrease in Lease Liability	(1,266)	(1,056)
(Decrease) Increase in Other Liabilities	(825)	423
Decrease in Deferred License Revenue	(1,485)	(1,338)
Changes in Assets and Liabilities	(3,556)	(1,621)
Cash Used In Operating Activities	(24,508)	(21,072)
Cash Flows From Investing Activities:
Purchase of Investments Available-for-Sale	(19,107)	(23,531)
Sale of Investments Available-for-Sale	19,286	27,076
Purchase of Equipment	(408)	(970)
Cash (Used In) Provided By Investing Activities	(229)	2,575
Cash Flows From Financing Activities:
Proceeds from Term Loan	0	22,500
Debt Issuance Costs	0	(1,343)
Payments on Short Term Note Payable	(656)	(763)
Proceeds from the Issuance of Common Stock for payment related to services provided	107	0
Repurchase of Common Stock to Pay Employee Withholding Taxes	(6)	(18)
Cash (Used In) Provided By Financing Activities	(555)	63,317
(Decrease) Increase in Cash and Cash Equivalents	(25,292)	44,820
Cash and Cash Equivalents at Beginning of Period	48,682	11,794
Cash and Cash Equivalents at End of Period	23,390	56,614
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	1,318	906
Supplemental Disclosure of Noncash Investing and Financing Activities:
Change in Unrealized Loss on Marketable Securities Available-for-Sale	(4)	(11)
Fair Value of Warrants issued related to Debt Financing	0	501
Public Offering
Cash Flows From Financing Activities:
Proceeds from the Issuance of Common Stock	0	43,148
Offering Costs from the Issuance of Common Stock	0	(2,469)
At-the-Market Offering
Cash Flows From Financing Activities:
Proceeds from the Issuance of Common Stock	0	2,325
Offering Costs from the Issuance of Common Stock	$ 0	$ (63)