UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows From Operating Activities:
Net Loss	$ (6,927)	$ (16,317)
Adjustments To Reconcile Net Loss To Net Cash Used In Operating Activities:
Depreciation and Amortization	894	422
Stock-based Compensation	714	95
Increase in Inventory Reserves	1,098	307
Non-cash Lease Expense from Right of Use Assets	1,529	1,518
Amortization of Debt Financing Costs and Accretion of Debt Discount	276	276
Loss (Gain) on Disposal of Assets	1	(3)
Realized Gain on Sale of Investments	(220)	(4)
Changes in Operating Assets and Liabilities:
Accounts Receivable, net	(3,102)	(1,454)
Inventory	1,561	(921)
Prepaid and Other Assets	875	2,058
Accounts Payable	(124)	(688)
Lease Liabilities	(1,113)	(1,435)
Other Liabilities	(1,033)	756
Deferred License Revenue	(3,798)	(1,427)
Cash Used In Operating Activities	(9,369)	(16,817)
Cash Flows From Investing Activities:
Purchase of Investments Available-for-Sale	(3,752)	(17,389)
Sale of Investments Available-for-Sale	11,301	11,972
Purchase of Equipment	(241)	(197)
Cash Paid in Connection with Evoqua Asset Acquisition	(12,361)	0
Cash Used In Investing Activities	(5,053)	(5,614)
Cash Flows From Financing Activities:
Payments on Debt	(500)	(6,750)
Payments on Insurance Financing Note Payable	(748)	(941)
Payments on Financing Lease Liabilities	(388)	0
Proceeds from Issuance of Common Stock	13,763	15,016
Offering Costs from Issuance of Common Stock	(43)	(106)
Proceeds from Issuance of Preferred Stock	0	15,000
Offering Costs from Issuance of Preferred Stock	0	(85)
Cash Provided by Financing Activities	12,084	22,134
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(5)	(3)
Net Decrease in Cash and Cash Equivalents	(2,343)	(300)
Cash and Cash Equivalents at Beginning of Period	10,102	13,280
Cash and Cash Equivalents at End of Period	7,759	12,980
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	929	1,261
Supplemental Disclosure of Non-cash Operating, Investing and Financing Activities:
Change in Unrealized (Loss) Gain on Investments Available-for-Sale	(90)	5
Increase in Prepaid Assets from Insurance Financing Note Payable	733	0
Deferred Consideration from Evoqua Asset Acquisition	$ 5,000	$ 0