UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Cash Flows From Operating Activities:
Net Loss	$ (7,752)	$ (7,984)
Adjustments To Reconcile Net Loss To Net Cash Used In Operating Activities:
Depreciation and Amortization	202	209
Stock-based Compensation	(236)	935
Increase in Inventory Reserves	71	0
Amortization of Right of Use Asset	412	391
Amortization of Debt Financing Costs and Accretion of Debt Discount	92	15
Loss on Disposal of Assets	6	0
Realized (Gain) on Sale of Investments Available-for-Sale	0	(2)
Foreign Currency Translation Adjustment	3	6
Changes in Assets and Liabilities:
Increase in Accounts Receivable, net	(2,426)	(384)
Increase in Inventory	(424)	(828)
Decrease in Prepaid and Other Assets	317	1,093
(Decrease) Increase in Accounts Payable	(848)	105
Increase (Decrease) in Settlement Payable	0	(47)
Decrease in Lease Liability	(410)	(339)
(Decrease) Increase in Other Liabilities	(958)	738
Decrease in Deferred License Revenue	(544)	(446)
Changes in Assets and Liabilities	(5,293)	(108)
Cash Used In Operating Activities	(12,495)	(6,538)
Cash Flows From Investing Activities:
Purchase of Investments Available-for-Sale	(7,212)	(8,872)
Sale of Investments Available-for-Sale	6,738	11,661
Purchase of Equipment	(38)	(203)
Cash (Used In) Provided By Investing Activities	(512)	2,586
Cash Flows From Financing Activities:
Proceeds from Term Loan	0	22,500
Debt Issuance Costs	0	(374)
Payments on Short Term Note Payable	0	(573)
Cash Provided By Financing Activities	0	29,557
(Decrease) Increase in Cash and Cash Equivalents	(13,007)	25,605
Cash and Cash Equivalents at Beginning of Period	48,682	11,795
Cash and Cash Equivalents at End of Period	35,675	37,400
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	485	81
Supplemental Disclosure of Noncash Investing and Financing Activities:
Change in Unrealized Loss on Marketable Securities Available-for-Sale	(7)	(7)
Issuance Costs related to Debt Financing, not yet paid	0	957
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 / Public Offering	0	8,148
Offering Costs from the Issuance of Common Stock / Public Offering	$ 0	$ (144)

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