UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash Flows From Operating Activities:
Net Income (Loss)	$ 276	$ (6,927)
Adjustments To Reconcile Net Income (Loss) To Net Cash Provided By (Used In) Operating Activities:
Depreciation and Amortization	1,637	894
Stock-based Compensation	910	714
Increase in Inventory Reserves	314	1,098
Non-cash Lease Expense from Right of Use Assets	1,446	1,529
Amortization of Debt Financing Costs and Accretion of Debt Discount and Premium	337	276
Loss on Disposal of Assets	0	1
Realized Gain on Sale of Investments	(51)	(220)
Changes in Operating Assets and Liabilities:
Accounts Receivable	2,024	(3,102)
Inventory	(331)	1,561
Prepaid and Other Assets	541	875
Accounts Payable	(1,909)	(124)
Lease Liabilities	(1,072)	(1,113)
Accrued and Other Liabilities	(751)	(1,033)
Deferred License Revenue	(34)	(3,798)
Net Cash Provided By (Used In) Operating Activities	3,337	(9,369)
Cash Flows From Investing Activities:
Purchase of Investments Available-for-Sale	(5,921)	(3,752)
Sale of Investments Available-for-Sale	2,003	11,301
Purchase of Equipment	(616)	(241)
Cash Paid in Connection with Evoqua Asset Acquisition	0	(12,361)
Net Cash Used In Investing Activities	(4,534)	(5,053)
Cash Flows From Financing Activities:
Payments on Debt	0	(500)
Payments on Insurance Financing Note Payable	(445)	(748)
Payments on Financing Lease Liabilities	(416)	(388)
Proceeds from Issuance of Common Stock	6,393	13,763
Offering Costs from Issuance of Common Stock	0	(43)
Deferred Consideration Paid in Connection with Evoqua Asset Acquisition	(976)	0
Net Cash Provided By Financing Activities	4,556	12,084
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(4)	(5)
Net Increase (Decrease) in Cash and Cash Equivalents	3,355	(2,343)
Cash and Cash Equivalents at Beginning of Period	8,983	10,102
Cash and Cash Equivalents at End of Period	12,338	7,759
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	645	929
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Issuance of Warrant in connection with the Third Amendment as Debt Issuance Costs	247	0
Right of Use Assets - Operating Obtained in Exchange for Lease Liabilities - Operating	1,984	0
Change in Unrealized Gain (Loss) on Investments Available-for-Sale	13	(90)
Increase in Prepaid Assets from Insurance Financing Note Payable	670	733
Proceeds from Issuance of Common Stock Upon Exercise of Options in Accounts Receivable, net	$ 9	$ 0