UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash Flows From Operating Activities:
Net Loss	$ (1,515)	$ (1,731)
Adjustments To Reconcile Net Loss To Net Cash Used In Operating Activities:
Depreciation and Amortization	539	545
Stock-based Compensation	445	251
Write-off of Inventory	178	0
Non-cash Lease Expense from Right of Use Assets	518	519
Amortization of Debt Financing Costs and Accretion of Debt Discount and Premium	88	219
Loss on Disposal of Assets	54	0
Realized Gain on Sale of Investments	(56)	0
Changes in Operating Assets and Liabilities:
Accounts Receivable	(1,379)	(193)
Inventory	733	(202)
Prepaid and Other Assets	378	153
Accounts Payable	(944)	403
Lease Liabilities	(389)	(395)
Accrued and Other Liabilities	(1,662)	(1,938)
Deferred License Revenue	(475)	(11)
Net Cash Used In Operating Activities	(3,487)	(2,380)
Cash Flows From Investing Activities:
Purchases of Investments Available-for-Sale	(2,938)	0
Sale of Investments Available-for-Sale	3,000	0
Purchase of Equipment	(63)	(139)
Net Cash Used In Investing Activities	(1)	(139)
Cash Flows From Financing Activities:
Payments on Insurance Financing Note Payable	(201)	(244)
Payments on Financing Lease Liabilities	(146)	(138)
Proceeds from Issuance of Common Stock	0	560
Deferred Consideration Paid in Connection with Evoqua Asset Acquisition	(436)	0
Net Cash (Used In) Provided By Financing Activities	(783)	178
Net Decrease in Cash and Cash Equivalents	(4,271)	(2,341)
Cash and Cash Equivalents at Beginning of Period	15,662	8,983
Cash and Cash Equivalents at End of Period	11,391	6,642
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	190	234
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Issuance of Warrant in connection with the Third Amendment as Debt Issuance Costs	0	247
Change in Unrealized Gain on Investments Available-for-Sale	$ 5	$ 25