CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash Flows From Operating Activities:
Net Loss	$ (480)	$ (8,439)
Adjustments To Reconcile Net Loss To Net Cash Provided By (Used In) Operating Activities:
Depreciation and Amortization	2,180	1,444
Stock-based Compensation	1,292	932
Increase in Inventory Reserves	425	1,098
Non-cash Lease Expense from Right of Use Assets	1,960	2,010
Amortization of Debt Financing Costs and Accretion of Debt Discount and Premium	426	1,107
Loss on Disposal of Assets	0	1
Realized Gain on Sale of Investments	(74)	(321)
Changes in Assets and Liabilities:
Accounts Receivable, net	2,610	(4,642)
Inventory	(332)	1,176
Prepaid and Other Assets	374	1,410
Accounts Payable	(1,647)	463
Lease Liabilities	(1,452)	(1,465)
Accrued and Other Liabilities	(1,034)	(376)
Deferred License Revenue	(46)	(3,810)
Changes in Operating Assets and Liabilities	(1,527)	(7,244)
Cash Provided By (Used In) Operating Activities	4,202	(9,412)
Cash Flows From Investing Activities:
Purchase of Investments Available-for-Sale	(5,858)	(5,701)
Sale of Investments Available-for-Sale	2,003	15,301
Purchase of Equipment	(1,011)	(284)
Cash Paid in Connection with Evoqua Asset Acquisition	0	(12,361)
Cash Used In Investing Activities	(4,866)	(3,045)
Cash Flows From Financing Activities:
Payments on Debt	0	(2,000)
Payments on Insurance Financing Note Payable	(646)	(992)
Payments on Finance Lease Liabilities	(558)	(522)
Proceeds from Issuance of Common Stock	10,181	14,861
Offering Costs from Issuance of Common Stock	0	(5)
Deferred Consideration Paid in Connection with Evoqua Asset Acquisition	(1,629)	0
Cash Provided By Financing Activities	7,348	11,342
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(5)	(4)
Increase (Decrease) In Cash and Cash Equivalents	6,679	(1,119)
Cash and Cash Equivalents At Beginning Of Year	8,983	10,102
Cash and Cash Equivalents At End Of Year	15,662	8,983
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	847	1,209
Supplemental Disclosure of Noncash 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	2,012	0
Change in Unrealized Gain (Loss) on Investments Available-for-Sale	60	(159)
Deferred Consideration from Evoqua Asset Acquisition	0	5,000
Increase in Prepaid Assets from Insurance Financing Note Payable	$ 670	$ 733